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INFO: 72 - 79 Gauge Clusters and Wiring |
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Psquare75 ![]() Admin Group ![]() Member of the Stroker Club Joined: 26-November-2005 Location: United States Status: Offline Points: 4590 |
![]() ![]() ![]() ![]() ![]() Posted: 04-January-2010 at 4:17PM |
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Taken from Ranchero.us, with permission from 72GTVA
<My thanks to Spence, Dan, Rob, HR, Clark, and others for their inputs to this article. If you see an area that needs expansion or if you have questions, PM or email through the site. Part 1: While they look similiar, there are a lot of differences in the '72 to '79 Gauge Groups that merits explanation. There are, in fact, 4 distinct groups of these clusters and there is a mixture of them between the model year cars. '72 and '73 are unique to those years, '74 and '75 are also unique to those years although some of these same clusters are found in '76 models. '76 "high" series was unique to the cars it was installed in, and '77 to '79 had some variations in those years as well. Be warned that when you purchase one of these for an upgrade or to replace your existing but deteriorating dash you may be in for some surprises. These are the main groups: Front: ![]() Back: ![]() These are the gauge covers for comparison, it should be noted that for some 1974 models depending on DSO code they did not have the "UNLEADED FUEL ONLY" branding on the fuel gauge, all US Market 1975 and up did. ![]() The '72 and '73 Gauge Clusters used metal gauge face trim pieces and edge lighting to identify the gauge functions. This is the unique '72 and '73 Gauge Cover with associated pieces: ![]() Edited by Psquare75 - 05-January-2010 at 4:37AM |
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Paul
77 XR7 460/C6/3.00:1 *SOLD* 78 XR7 523/C6/3.5:1 79 F100 460/TKO500/3.25:1 'I also have some left over potatoes-I understand you can generate electricity from them'- Foote500 |
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Psquare75 ![]() Admin Group ![]() Member of the Stroker Club Joined: 26-November-2005 Location: United States Status: Offline Points: 4590 |
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Part 2:
This photo shows the difference between the '72 and '73 Gauge Cover and the later year covers: ![]() The case back where the gauges mount was modified beginning in 1974 and carried on through the 1979 models. Most of the differences are shown below: ![]() One of the changes not readily apparent is the difference in the depth of the gauges, the change being implemented by increasing the size of the stand-offs cast into the back. ![]() The printed circuit connectors and more importantly the pin outs were different for each of the main year groups: ![]() |
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Paul
77 XR7 460/C6/3.00:1 *SOLD* 78 XR7 523/C6/3.5:1 79 F100 460/TKO500/3.25:1 'I also have some left over potatoes-I understand you can generate electricity from them'- Foote500 |
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Psquare75 ![]() Admin Group ![]() Member of the Stroker Club Joined: 26-November-2005 Location: United States Status: Offline Points: 4590 |
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Part 3:
6 different printed circuits were used across the groups. 4 of the six will be shown here, '77, '78 and '79 each had it's own engineering number on the circuit however, the wiring and pin outs appear to be the same. '72 and '73 and the '74 and '75 printed circuits. Some 1976 models had the '74 and '75 cluster with printed circuit: ![]() '76 and '77 - '79 Printed circuits: High series 1976 had a unique printed circuit that could also be found in some '77 - '79 series vehicles. This was dependent on options installed with these cars: ![]() The gauge layouts differed between the year groups as well: ![]() Tachometer and indicator lights differed through the year groups '72 - '76 Green Printed Circuit Tachometers are serial tachometers: ![]() |
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Paul
77 XR7 460/C6/3.00:1 *SOLD* 78 XR7 523/C6/3.5:1 79 F100 460/TKO500/3.25:1 'I also have some left over potatoes-I understand you can generate electricity from them'- Foote500 |
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Psquare75 ![]() Admin Group ![]() Member of the Stroker Club Joined: 26-November-2005 Location: United States Status: Offline Points: 4590 |
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Part 4:
The '72 through '76 speedometers feature a 120 MPH range while the '77 - '79 featured an 85 MPH limit. Speedometers for the year groups: ![]() Shown below is a Police 140 MPH speedometer fitted into a member's '77 - '79 Gauge cluster. Note no Trip Odometer. ![]() auge Cluster wire harness on the back of the cluster differed between groups with the '72 and '73 using a harness that included one of the turn signal indicators in addtion to tachometer, ammeter, and clock wiring, shown below: ![]() The '74 -'79 eliminated the need for turn signal indicator on the harness, and the '77 - '79 change the connector type and added a ground wire for the tachometer: ![]() The '77 to '79 Tachometer changes from a serial tachometer. The wiring as shown in the picture above shows the three leads, connections for these tachometers is: Red - power through ignition switch Black - Ground G206 Green/white dots - signal from the (-) of the coil to the tach Edited by Psquare75 - 04-January-2010 at 4:29PM |
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Paul
77 XR7 460/C6/3.00:1 *SOLD* 78 XR7 523/C6/3.5:1 79 F100 460/TKO500/3.25:1 'I also have some left over potatoes-I understand you can generate electricity from them'- Foote500 |
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Psquare75 ![]() Admin Group ![]() Member of the Stroker Club Joined: 26-November-2005 Location: United States Status: Offline Points: 4590 |
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Part 5:
Wiring: This is the factory harness that connects the harness on the back of the cluster to the engine wiring harness: ![]() This is the factory engine to fuse block harness that contains the integral tachometer and ammeter wiring: ![]() For those that are troubleshooting Tachometer or ammeter wiring issues or those retrofitting a gauge cluster into a standard car the following rough sketches show the proper wiring paths: 1972 through 1976 (Green Printed Circuit) Tachometer: ![]() Ammeter: To properly install the wiring for the ammeter you need an insulator junction block, one or two (recommended) 14 Gauge fusible links, 30-36 inches of yellow 10 gauge primary wire, and yellow and red 14 gauge primary wire (approximately 12' of each). Install the insulated junction block on the flat boss under the starter solenoid, take the original primary wiring off of the starter solenoid and attach to the insulated junction block, then install the shunt per the diagram below: ![]() For those that are retrofitting a gauge cluster into a standard dash car you need to change the oil pressure switch with an oil pressure sending unit and then install the tachometer and ammeter wiring above. The final item required is to tap off of your cigar lighter power feed (light blue / white stripe) for clock power. |
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Paul
77 XR7 460/C6/3.00:1 *SOLD* 78 XR7 523/C6/3.5:1 79 F100 460/TKO500/3.25:1 'I also have some left over potatoes-I understand you can generate electricity from them'- Foote500 |
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Psquare75 ![]() Admin Group ![]() Member of the Stroker Club Joined: 26-November-2005 Location: United States Status: Offline Points: 4590 |
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Part six:
This is the gauge harness pin-outs: ![]() This is the standard cluster in the '72 and '73 (74 - 76 are similiar): Front: ![]() Back: ![]() The Gauges and Optional clock: ![]() It should be noted that the same printed circuit connector is used appropriate to the year groups, a '72 and '73 standard cluster would not be "plug and play" with a '74 and later cluster. |
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Paul
77 XR7 460/C6/3.00:1 *SOLD* 78 XR7 523/C6/3.5:1 79 F100 460/TKO500/3.25:1 'I also have some left over potatoes-I understand you can generate electricity from them'- Foote500 |
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Psquare75 ![]() Admin Group ![]() Member of the Stroker Club Joined: 26-November-2005 Location: United States Status: Offline Points: 4590 |
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This is a sketch of the parallel tach used in the '77 through '79 models and some '76 vehicles as well:
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Paul
77 XR7 460/C6/3.00:1 *SOLD* 78 XR7 523/C6/3.5:1 79 F100 460/TKO500/3.25:1 'I also have some left over potatoes-I understand you can generate electricity from them'- Foote500 |
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picon3 ![]() Senior Member ![]() Joined: 20-February-2007 Location: North Carolina Status: Offline Points: 2095 |
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Excellent info. We may want to put it at the top of the forum like the tire one so it doesn't move down and get lost. What ya' think? Paul~ |
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1972 GTS 351CJ-4V black/black
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Psquare75 ![]() Admin Group ![]() Member of the Stroker Club Joined: 26-November-2005 Location: United States Status: Offline Points: 4590 |
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It's been 'stickied'. Not going anywhere. One of the admins at Ranchero.us gave us his permission to use his thread so I copied the pictures and moved it here.. :)
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Paul
77 XR7 460/C6/3.00:1 *SOLD* 78 XR7 523/C6/3.5:1 79 F100 460/TKO500/3.25:1 'I also have some left over potatoes-I understand you can generate electricity from them'- Foote500 |
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Torinogts73c ![]() Senior Member ![]() ![]() Joined: 14-February-2004 Location: Tucson Arizona Status: Offline Points: 1034 |
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Lots of good info even for troubleshooting problems. Thanks Paul!! |
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Gary 73 Gran Torino Sport 351CJ,17 Mustang Ecoboost,15 Jeep Grand Cherokee LTD, Ford Ranger parts hauler
"Never complain Never explain" Henry Ford |
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neejah ![]() Member ![]() Joined: 13-June-2009 Location: GA Status: Offline Points: 114 |
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Does anyone have any idea what the pin outs are for the clusters? I've been wiring up a 73 cluster into a 72 which obviously have different connectors........but I don't think that the wiring color code remained the same between the years (I could be wrong tho......but I connected the color codes from the 72 onto the 73 connector, and the indicator & brake warning lamps illuminated together) ideally if someone has a list with the pin outs for a 72 ( with color codes) and 73 it would be good.
The wiring diagram leaves a little to be desired! Either that or it's me in the garage with a multimeter and a pencil tracing the PCB! Thanks Neil
Edited by neejah - 29-March-2010 at 3:16PM |
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neejah ![]() Member ![]() Joined: 13-June-2009 Location: GA Status: Offline Points: 114 |
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For posterity (fitting a '74/'76 cluster into a '72) -
Pin PCB Connections ('74-'76) Car ('72) 1 Purple/White (Brake) Purple/White 2 Red/White (Eng Temp) Red/White 3 Blue/Red (Illumination) Blue/Red 4 Black (-ve supply) 5 White/Blue (Right Turn Ind) White/Blue 6 Green/White (Left Turn Ind) Green/White 7 Green/Black (High Beam Ind) Green/Black 8 Black - Don't Splice (+12v) Black - Don't Splice (+12v) 9 Yellow/White (Oil Pressure) White/Red 10 White/Red (Fuel) Yellow/White 11 Green/Red (No connection on PCB) Green/Red 12 Yellow/White (Top RH Warning Lamp) 13 Green (Btm RH Warning Lamp) 14 Red/Yellow Dash (-ve) Red/Yellow Dash (under hood conn.) Notes: Pin 14 & Pin 4 I routed to a new ground - the harness for pin 14 terminated in an underhood connection which didn't go anywhere. Pins 12 & 13 I haven't connected at the minute - I might use them for a shift light at some point in the future.......didn't really care about the fasten seat belt warning! Hopefully it might help someone in future......... Neil Edited by neejah - 08-April-2010 at 1:36PM |
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GRAN1976TORINO ![]() Member ![]() Joined: 20-September-2006 Status: Offline Points: 108 |
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Would you happen to know what wires off the engine to firewall "cluster" would specifically be dedicated to a 1976 Torino water temperature sending unit? I have replaced the gauge on the dash (standard version - not sport cluster) as well as the actual sending unit on the engine and it still wont work. I even tried "shorting" out the sending unit in hopes to "ping" the gauge but still no-go. I am wondering if I need to just run new wires. Thoughts? Thanks!
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picon3 ![]() Senior Member ![]() Joined: 20-February-2007 Location: North Carolina Status: Offline Points: 2095 |
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Neil,
Wow, that was a lot of work! Cudos to you and for posting the info.
Paul~
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1972 GTS 351CJ-4V black/black
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neejah ![]() Member ![]() Joined: 13-June-2009 Location: GA Status: Offline Points: 114 |
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I'd have expected that the wire colours are as shown above - the water temp wiring runs to a four pin connector near the wiper motor, I'd check for corrosion in that first. Do a continuity check on the short under hood harness to the sender & back to the clocks - it should tell you which area has the problem - it could also be in the firewall multi plug. Is the PCB on the rear of the clocks OK? If the worst comes to the worst I wouldn't see a problem running a new wire in! Good Luck Neil
A while sitting with a multi meter! Hopefully it might help someone else out.......although it just confirmed the fact that I'd like to get my hands on the "mechanic" that did some wiring on mine ![]() Cheers Neil Edited by neejah - 10-April-2010 at 1:24PM |
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TechMdawg ![]() Member ![]() ![]() Joined: 24-July-2006 Location: Augusta Maine Status: Offline Points: 39 |
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Because of this post I may have to remove my instrument cluster to clean and possibly replace the bulbs with led lights, lots of great and interesting work.THANKS!!!!!!
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Tech Mdawg 1975 Ford Torino Elite
1973 Gran Torino "sold" |
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GA Army Vet ![]() Member ![]() Joined: 24-October-2010 Location: 30525 GA Status: Offline Points: 126 |
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What size tach fits in the 73 gran torino sport, spot on the dash? Something from summit, they have alot of sizes, I want something that will mount inside the empty spot. Is there a spot in my wire harness to wire it in if it didnt come with it?
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1973 GTS-351c C6 28sp axle 2.73gears (looking to change)
2004 electric wheelchair super fast! Disabled Iraq Vet, IED boke my back and severed my nerves into my legs I can walk but it hurts bad. |
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steeler80 ![]() New Member ![]() Joined: 26-April-2010 Location: southeast KY Status: Offline Points: 7 |
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This thread is terrific. Thanks! I had found a 73 Ranchero with the gt gauge cluster and was wondering if it would work in my 74. Now I know.
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Damo70 ![]() Member ![]() ![]() Joined: 13-April-2010 Location: Melbourne Status: Offline Points: 76 |
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Hi Psquare
I have installed a dash cluster into my 75 gran torino, everything was working fine however no lights around fuel gauge, changed globes and all sorted. I connected all back together and blew a fuse for the cluster. Now I have no lights it and no oil/temp working. Any ideas as to what to do, I have checked the fuse replaced the 4 amp with a 3 amp as thats all the autoshop had. would this make any difference, should I change all the globes again, they look ok when you pull them out. No fuses on the cluster itself I need to look at is there? Any feedback appreciated as I had it all working perfectly.
Cheers
Damian |
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BackInBlack ![]() Senior Member ![]() ![]() Joined: 11-January-2011 Location: Virginia Status: Offline Points: 1012 |
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Very helpful post!!
Anyone know how to check and set the tachometer calibration?
My tach, when sitting in a normal position removed from car, reads about 500rpm for zero. When I set the tach flat on a table on its back the needle reads 0.
I want to make sure this is calibrated before I put the dash back together with the restored gauges.
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-John
1973 GTS |
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BackInBlack ![]() Senior Member ![]() ![]() Joined: 11-January-2011 Location: Virginia Status: Offline Points: 1012 |
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I have a problem with my dash lights and gauge lights, completely dead. They used to work until I had the headliner replaced. The installer shorted something out and blew out 2-3 fuses.
I have since replaced fuses and replaced the headlight switch, thinking that the rherostat might have been blown. Gauges work but the Instrument lights and the lights that shine over the knobs do not come on. Are there any other fuses or something I'm missing... Thanks, John
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-John
1973 GTS |
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lynchster ![]() Senior Member ![]() ![]() Joined: 07-January-2006 Location: Pennsylvania Status: Offline Points: 2141 |
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Brake lights working?
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Chuck
72 Gran Torino Sport 08 Taurus (Maytag) 03 Dakota (Rusty) |
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BackInBlack ![]() Senior Member ![]() ![]() Joined: 11-January-2011 Location: Virginia Status: Offline Points: 1012 |
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Yup...brake lights, blinkers...etc everything else working. Gear shift and interior floor and headliner lights work.
Just the dash lights. No voltage to the dash bulbs. |
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-John
1973 GTS |
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torkair ![]() Senior Member ![]() Joined: 01-May-2010 Location: Tucson, Az Status: Offline Points: 430 |
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I'm wiring a 74 GT cluster into a 73 Sports roof car and need to know which wires need to be connected to each other for it to all work correctly.
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72 Gran Torino "sport"- in progress
73 Ranchero GT- Q code-460/C6/3.25 open rear |
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Psquare75 ![]() Admin Group ![]() Member of the Stroker Club Joined: 26-November-2005 Location: United States Status: Offline Points: 4590 |
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That's what this INFO thread is for. You are better off getting a '74 cluster.
Worse case, Everything is there that you need to wire it from scratch if necessary.
Edited by Psquare75 - 08-May-2011 at 1:42AM |
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Paul
77 XR7 460/C6/3.00:1 *SOLD* 78 XR7 523/C6/3.5:1 79 F100 460/TKO500/3.25:1 'I also have some left over potatoes-I understand you can generate electricity from them'- Foote500 |
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GA Army Vet ![]() Member ![]() Joined: 24-October-2010 Location: 30525 GA Status: Offline Points: 126 |
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I had the same issue this weekend, I forgot to change the fuse.
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1973 GTS-351c C6 28sp axle 2.73gears (looking to change)
2004 electric wheelchair super fast! Disabled Iraq Vet, IED boke my back and severed my nerves into my legs I can walk but it hurts bad. |
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crispy23c ![]() Senior Member ![]() ![]() Joined: 10-November-2007 Location: New Hampshire Status: Offline Points: 1100 |
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Anyone do anything besides putting in LEDs to brighten the cluster lighting?
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Psquare75 ![]() Admin Group ![]() Member of the Stroker Club Joined: 26-November-2005 Location: United States Status: Offline Points: 4590 |
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Washing the interior of the cluster case helped a little.
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Paul
77 XR7 460/C6/3.00:1 *SOLD* 78 XR7 523/C6/3.5:1 79 F100 460/TKO500/3.25:1 'I also have some left over potatoes-I understand you can generate electricity from them'- Foote500 |
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76 cougar ![]() Member ![]() Joined: 21-July-2006 Location: N. Ga. Status: Offline Points: 90 |
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I wonder if you spray the inside with chrome paint if it would help.
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76 one owner Factory 460/moonroof cougar
1975 ford 2600 97 jeep TJ 96 jeep cherokee 2000 ford f350 |
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BackInBlack ![]() Senior Member ![]() ![]() Joined: 11-January-2011 Location: Virginia Status: Offline Points: 1012 |
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I restored the cluster except for having any silkscreen work done.
Careful cleaning with damp clothes, very low pressure on the air hose, and careful use of a swiffer duster. I used Plastic headlamp polish on the gauge lens. Carefully repainted the gauge needles with the correct fluorescent orange paint. the only problem I had is the trip meter numbers blew off while blowing out the dust. My car is from the desert and it is hell on interiors. All-in-all turned out nice. I just finished my interior. Looks almost new now. I'll post some pics on my car link soon. Oh BTW I replaced all the bulbs in the dash and interior with LED bulbs. Looks great. Stock colors so it all looks original. The best thing I like about the LED bulbs is the reduction of the heat and the fact that if I leave a dome light on it doesn't drain the battery, leaving me with a dead battery. Edited by BackInBlack - 19-June-2011 at 1:39PM |
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-John
1973 GTS |
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