Originally Posted by Red90
I guess I would trace the white/slate wire from the cluster then. You need to see where it goes and what is wrong.
I am pretty sure you are right with this module.
I was fixing my not working diff lock today (adjusted linkage and turned switch out a couple turns, and she is working) and I decided it was a good opportunity to trace the wires, being that I had both floor pans, and tranny tunnel off.
Sure enough I follow the harness off fuel sender up the engine side firewall. I see the ground bolt to the upper bulkhead. I see the green and slate go to a harness, but wait! The green mates with another wire on the other side. The slate, there is no wire on the other side. The connector is blocked off. Nada. From the factory.
To double check I disconnected this harness and sure enough the fuel gauge goes to zero. Definitely the right harness.
So that means the slate is in fact not hooked up to anything and the green must be my low fuel light wire as well.
Once my new VDO gauges get here I will trace the wire behind the dash to find the module to see if I can find the problem. If not I will grab that one you linked (big help thank you!)
Alternatively I can run a wire to the slate/grey off the sender harness directly to the dash to create my own 3 wire setup.
The only other possibility is the dash warning cluster is screwy, but every other light works as it should so that is unlikely.