Gauges are going ape sh*t!

[blueridgerobbie]

My gauges are going every which way but loose. When I crank the truck the volt guage goes up, weird. RPM seem to work fine. Haven't got to actually drive it yet to test the MPH. Can anybody tell me why the Volt gauge is wack? I am thinking it is a ground somewhere but where do I start looking and does anyone have a clue how many there are and location?

 

[blueridgerobbie]

Anybody?

 

[gmcyukondriver]

If your truck is a 95, then this should be the same for you (since it says Yukon). Sounds like a grounding issue or short to me. Hopefully this helps.

http://www.gmtruckcentral.com/wirin...ig 29 Instrument Cluster Circuit Gasoline.pdf

 

[blueridgerobbie]

Thanks man, I'll give it a look