Hooking up the Temp Guage

[byates2]

So i put the temp guage in the passenger side header because according to the wiring diagram its a yellow wire that is wrapped with the starter/solenoid wiring.

Is that in fact the temp guage wire?
It looks as if i need a terminal connector or something like?
Do i need to redo that wire with the terminal?

[ls1nova71]

Temp wire is dark green, that yellow wire goes from the starter to the coil.

[asolde]

Your temp sensor should go on the drivers side head. You should have a green wire going along the drivers side with a special connector for the sensor.

[byates2]

I have HEI and its supposed to be an updated wiring harness for HEI. I started the engine for the first time today and it fired right up. Does that hook up on the starter itself then? What would be the sypmtoms of that not being hooked up?

On the diagram i have it says "temp gu" on the passenger
on the driver side, it says "temp sw". I think i found the wire, how do i tell if my harness has warning light?

[VetteVet]

Here's a diagram to help you see how the temp wire is routed.
When you get yours hooked up if it doesn't work then try using a conductive sealer on the threads instead of the teflon tape.
The wire end is a slide on to the sender not a ring terminal.



You can see the yellow wire on the starter and the green temp sender wire is to the left of the engine block.

[byates2]

So how do i tell if a need that mushroom head style sender or the one with the wire clip on the end. I know the one with the electrical connection has warning lights, how can i figure that out

[VetteVet]

First things first.
That yellow wire is connected to the key switch and is the old ignition wire for the points. It is shown as the pink/black wire in the diagram. It goes through the firewall block by the master cylinder into the cab and to the ignition switch.
You must have a different wire to power the HEI distributor.

You have to check the yellow wire for power with the key on and it if is hot then you have to tape it off or insulate it somehow or it may short against the block or starter and blow a fuse or start a fire in the harness.

You need to locate the green wire with the slide on clip and connect it to the sender. There are two senders for our trucks, one for the idiot light in the dash and one for the temperature gauge in the gauge dash. What do you have in your dash? The sender will work in either head because the heads are interchangeable. They will fit on either side of the block but they will be reversed.
The sender just grounds the wire as the engine heats up but at a different rate for each sender. If you find the dark green wire just hook it up and see if the gauge or light works. If it doesn't work or it works but not correctly then start a new thread and we'll help you with it.