Temp Gauge Wiring - Team Camaro Tech
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post #1 of 3 (permalink) Old Oct 7th, 18, 02:16 PM Thread Starter
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Bob
 
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Temp Gauge Wiring

I am installing an aftermarket temp gauge, etc in my 68 -- it only had the idiot light. My question has to do with the existing wiring, and I'm going crazy trying to deal with the wiring diagram. Searched the forum but have not found an answer. The diagram(s) show a green wire from the sensor to the instrument panel plug, and a green wire from the ignition switch (the "GD" terminal) to the same terminal on the instrument panel plug. I have installed the new temp sensor in the engine block, and cut the green wire coming from the sensor to the instrument panel plug and connected it to the new gauge.



I think the green wire from the ignition switch is a momentary ground to test the temp idiot light when in the start position? If so can/should I disconnect that wire from the panel plug?



Also, what's the best way to get 12 v "accessory" power to the gauge cluster?


Thanks,
Bob H
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post #2 of 3 (permalink) Old Oct 7th, 18, 04:50 PM
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Re: Temp Gauge Wiring

Leave OE temp wire circuitry alone.
Use the ACC spade on fuse panel.

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post #3 of 3 (permalink) Old Nov 8th, 18, 11:40 AM Thread Starter
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Bob
 
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Re: Temp Gauge Wiring

So I researched this a bit more and I think I have answered my own question. First of all my question was about the (green) wire coming from the oil pressure sensor on the block to the instrument panel connector [I had already used the Acc terminal on the fuse block for positive voltage to the gauges]. The stock oil pressure sensor simply creates a ground when the pressure drops below a certain level, and this completes the circuit to the idiot light in the instrument panel. The other green wire that attaches to the same terminal in the instrument panel connector comes from the "ground" terminal on the ignition switch and provides a momentary ground to test the oil press idiot light.

Since the Auto Meter pressure sensor I installed in the engine block needs to be connected directly to the oil press gauge, I used the existing green wire running from the block to the instrument panel connector. I cut that wire near the connector and connected it to the oil pressure gauge. Works great. I left the other green wire coming from the ignition switch to the instr panel connector alone, since I'm not 100% sure whether it has any other function.
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