Icannap1 thank you.
I had success, sort of. I used the jumper cable connected to the battery ground and put it in the passenger window, removed the instrument cluster and found the one ground on the top rear of the cluster. I started the disco and let the temp gauge spike and then touched the jumper wire to the instrument cluster ground and HOORAY the temp needle went to normal.
I then removed the drivers kick panel and touched the jumper wire there and HOORAY, temp gauge went to normal, dash lights went to normal brightness and fan speed went up to normal speed?
I tried to follow the large gauge black wire out under the hood. I removed the air filter box and cleaned the ground wires near the fender, but that did not correct the temp gauge.
It was getting ready to rain, so I ran a 10 gauge wire from the battery negative into the firewall and attached it to the grounding bundle in the driver's kick panel.
All is working as it should.
I did remove the battery ground cable at the frame, and the motor cable at the frame, but didn't have time to do the motor ground at the engine side.
I'll look at your diagrams, but I would really like to know where the grounding strap in the driver's kick panel go out under the hood and where they pull ground from? It looked like they might go behind the engine near the firewall and down to the transmission or engine?
Any thoughts on where those grounds pull from would be helpfull.
Thanks for all the help. Maybe not the "correct" solution, but it is workable for me for now. If I track down the exact ground problem, I'll be sure to post it. I found a lot of posts on the web about temp gauge spiking with headlights and fan on.
I had success, sort of. I used the jumper cable connected to the battery ground and put it in the passenger window, removed the instrument cluster and found the one ground on the top rear of the cluster. I started the disco and let the temp gauge spike and then touched the jumper wire to the instrument cluster ground and HOORAY the temp needle went to normal.
I then removed the drivers kick panel and touched the jumper wire there and HOORAY, temp gauge went to normal, dash lights went to normal brightness and fan speed went up to normal speed?
I tried to follow the large gauge black wire out under the hood. I removed the air filter box and cleaned the ground wires near the fender, but that did not correct the temp gauge.
It was getting ready to rain, so I ran a 10 gauge wire from the battery negative into the firewall and attached it to the grounding bundle in the driver's kick panel.
All is working as it should.
I did remove the battery ground cable at the frame, and the motor cable at the frame, but didn't have time to do the motor ground at the engine side.
I'll look at your diagrams, but I would really like to know where the grounding strap in the driver's kick panel go out under the hood and where they pull ground from? It looked like they might go behind the engine near the firewall and down to the transmission or engine?
Any thoughts on where those grounds pull from would be helpfull.
Thanks for all the help. Maybe not the "correct" solution, but it is workable for me for now. If I track down the exact ground problem, I'll be sure to post it. I found a lot of posts on the web about temp gauge spiking with headlights and fan on.