I had done some rewiring and now some issues with my gauge cluster have come up. When I turn my key to the on position my Oil press gauge shoots to the top. The Coolant temp does the same but much more slowly. I've checked the wires that seem to be grounds from the service manual and those seem to be fine. What kind of signal would these things need to get to act like they have been?
Any help would be great.

Thanks
~Luke

 

The circuit is grounded somewhere. Both those gauges work by varying the resistance to ground, depending on temp or pressure.

 

In the wiring diagram I'm seeing that the only ground for the gauges seems to be through the sensor that they are responding to. Is there another ground that i'm missing? It seems there is pretty much 3 leads coming off the gauges, one runs to the meter fuse, another to the room, and their sensor. i think i'm missing something here.

 

haha i had that problem. look at the left side of the FSM on the gauge cluster, i think 2k? there's a ground wire hard to see at first glance. that's a common ground and goes through about 7 connections... if you take your gauge cluster out it's on the (iirc) black plug on the left ( driver) side lookign at the gauge side of the cluster. that ground wire controls all the gauge. i had tach adn speedo problems also. when i put a multimeter it showed ground... but the gauge wouldn't work... so what i did instead of tracing.... was t taps a ground and passed a wire with a loop and ground it to the dashboard bolt. and all my gauges work flawlessly. check it. out. if you need me to i can get the exact page abnd wire number and color to help you find it. theres' actually 3 actual grounds on the for the cluster. 1 on the left plug. and 2 on the right side. BUT the 2 on the right crimped together and became a single wire. took me a while to follow it all and notice everything. tell me how it works. late.


Los.
93 VR Non-Sq

 

I looking at the wiring diagram and cant seem to see the wires you are reffering to. So any specifics would be great.

I also unhooked the wire that goes to the oil press sending unit and it no longer jumps up while the key is in the on position.