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Coolant temp sender

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ssregal39 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ssregal39 Quote  Post ReplyReply Direct Link To This Post Topic: Coolant temp sender
    Posted: 21-August-2016 at 10:14AM
I just got done with a 302 to 351W swap on my 78 bird.
I'm using a 2 pin temp sender that was in the 302 and the original half round connector. After break in I've found the gauge not working and I'm pretty sure it's the sender. It's open to both pins when I check the resistance on it.
The thing is I can't find a two pin temp sender anywhere (napa online etc). I have two single pin senders on other motors and my parts car. I suppose I could adapt the single pin but, I'm just confused as to what this two pin sender is.
Any thoughts out there in Ford land?? Is this a one off bastardized part?Confused
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californiajohnny View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote californiajohnny Quote  Post ReplyReply Direct Link To This Post Posted: 21-August-2016 at 10:29AM
i've seen those senders like you describe on the later vehicles, not sure what the second wire is? possibly an independent ground??? the single wire senders are grounded through the threads and the wire is the negative side of the gauge.
JOHN
74 GRAN TORINO S&H CLONE
74 CORVETTE COUPE CUSTOM
90 S10 BLAZER 4X4 LIFTED
77 CELICA CUSTOM
75 V8 MONZA SUPERCHARGED
79 COURIER VERT. SLAMMED
75 VEGA V6 5 SPD
70 CHEV C10 P/U
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Big Bird View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Big Bird Quote  Post ReplyReply Direct Link To This Post Posted: 21-August-2016 at 12:00PM
My 79 has the same connector. Thought maybe 1 pin is for gauge, 1 is for idiot light, but I might be mistaken.
The above post should be read in a "Grumpy Old Man" voice.
Almost forgot: "Get off my lawn!!!"
Randy
1979 T-Bird
2006 GMC Sierra
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ssregal39 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ssregal39 Quote  Post ReplyReply Direct Link To This Post Posted: 21-August-2016 at 12:29PM
I don't know either. I have a complete set of1978 ford FSMs and they don't show it like it is on the car.
I'll try some more research.
thanks for the info so far. 😊
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ssregal39 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ssregal39 Quote  Post ReplyReply Direct Link To This Post Posted: 22-August-2016 at 4:05AM
Well, I wasn't able to find a two pin switch anywhere. So, I stuck the single pin in it. I had to connect the sensor wire to the harness red wire and the yellow harness wire to ground and the gauge works fine.
S, I guess the other pin on the sensor was for ground. Odd.
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