1999 3930 instrument cluster wiring

[huntlouviere]

Hello all. New member here. I recently purchased a 1999(I think) NH 3930. None of the gauges or warning lights worked. I removed the cluster and at some point it was a rat house. I spliced the broken wires I could match up and now two warning lights come on (not sure which ones they are) with key on engine not running. The fuel gauge still doesn’t work and I can’t tell if the temp gauge does. Anyone have a wire diagram for the cluster?

 

[huntlouviere]

Minus the lights and tach cable these are the only wires I have going into the back of the cluster. Is there a power supply wire that should plug into the spade above the red wire on the right side of this picture? That the back of the temp gauge. I should add that someone prior installed a toggle switch to work the fuel shutoff solenoid.

 

[Harry in Ky]

No surprise on the toggle switch. The fuel shut off solenoid wiring is a bit tricky, not just a single wire from the key switch like the cluster. Lots of those tractors have been "toggle switched" because those working on them couldn't figure out how it's supposed to work. That's another matter.

Yes, there should be an ignition (power there with key on) wire to the spade neat the back of the temp gauge. It will come from the fuse block. That supplies both gauges. The warning lights are all separate, not supplied by that particular wire. The black wires are all ground wires.

 

[huntlouviere]

Thank you. I thought if I run a wire from that toggle switch to that spade would remedy this issue. Any chance you know which size fuse??

 

[Harry in Ky]

I think a ten amp is what they used.