I recently installed some indiglo gauges in my 91 pick-up and wired it to the back of the gauge cluster by cutting into the original light panel wiring. The gauge work great, but now the gas and temperature gauges only partialy work or don't work at all. I still want the gauges to work without having to jack into the dimmer switch. Any help on rewiring this puppy would be greatly appreciated. Mahalo!

Partially working sounds like a poor connection. Use a wiring diagram to see which wire(s) would be best for your application.