i swapped my old EX cluster out for a GSR cluster. I had to cut the EX harness to fit into the GSR cluster. I then decided to use my old EX cluster later on, i put all the wires back together and it worked great....then i decided to get glow gauges, put those in and also was fine, until one night when i was messing around with the wires in theback of the cluster, and then the dash lights and cluster lights went out. i checked all fuses and were fine.
when i take the interior light wire on the cluster and put it to ground, the heater control lights turn on, but not my cluster lights, i don't really know what's going on, i think it might be a bad switch, but not 100% sure. i can still see my cluster because of the glow gauges, but it would be nice to see my heater controls and my milage on my cluster? could i have blown the bulbs in the back of the cluster or the whole cluster itself is fried?

any suggestions or comments would be great....

thanks

 

Easiest thing to do is start at the dimmer switch. Tap it, if the cluster lights come on, you've found the problem. If they don't, it still could be the switch.

If you know the switch is good and the wiring is correct and secure, then you'll have to remove the cluster and have a look around to see if anything is burnt, melted, etc, or just blown bulbs.