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4ZUA787
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Discussion Starter · #1 ·
hey i need to no which wires go to the temp gauge theres 3 connections on the back of the gauge one has a (+) which i would assume is a 12 volt connection the other has a (G) i believe thats the ground and i assume that leaves the connector inbetween those two for were the gauge wire attaches too, can any one clarify this for me??
 

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Banned
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of the upper 3 together the G is to the thermostat. HTH
 

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As per the '72 FSM (tell me if your's is a pre-'71), the upper terminal should be a "+", and is connected to a black wire with a red stripe, which also connects to the "+" terminal on the fuel gage. This is a "hot" from the fuse box.

The centre post should be connected to a brown wire, which is the ground.

The lower terminal should be marked "G", and is connected to a blue wire, which is connected to the temperature sending unit.

If you are going to play with wiring (or darn near anything on an Opel), you REALLY need a service manual, and preferably a FSM (Factory Service Manual). Or at LEAST download the wiring diagrams from the Photo Gallery. JM2CW, IMHO, FWIW.
 

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4ZUA787
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665 Posts
Discussion Starter · #4 ·
mine is a 72 and i have a print out of the wireing diagram just dont have access to it till monday so i wanted to no befor hand so i could start messin wit it. thanks for the help.
 
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