dash lights will not work.I have replaced dimmer switch.

I'd take a look at the system ground...the 1/0 battery lug as it attaches to the frame...wirebrush it until 300 cold cranking amps can get thru without welding itself too much (and this connection DOES weld itself with the amperage) and will create a comprimized connection....all we can do is wirebrush off the "burnt" stuff stopping a SOLID connection to ground from happening...be sure to wirebrush it clean that way the Starter motor with it's Giant requirements and the ignition and ECU with it's tiny requirements can both enjoy a connection that does not vary in voltage and available amperage.....bust out the wirebrush and wrench and clean it up there at that bolted connection to the 1/0 battery cable...also the one that goes to the block (mounted near the alternator)~

The dashboard/chassis just ain't gettin' it...you aim to correct the situation~

Check all fuses and relays very carefully . Incomplete circuits have been known to bleed back thru other circuits

I have the same problem. For a while I could hit the dash with my fist, the lights would come on. But the light in the counsel had a mind of it,s own . Sometimes it would work and some times not. Now I can,t get the dash lights or counsel lights to work. Can anyone help?