Dash lights and ac stoped working after installing anew stereo. is it just a fuse or relay

You blew a fuse or relay. Check the fuses in the fuse panel, if those are good, check for burnt and\or "popped"-"blown" relays. Relays are usually located in a (black) box under the hood. (some are a different color, like red). Remove the cover, and on the inside (or out) you will find a diagram of the relay placement. Locate the desired relay and if it ls clear, take not as to whether its got a split in the "diode". You'll see it. If not clear, buy or find a fuse tester. Pull the relay and touch any two prongs until the light comes on, on the tester. If light stays off, the relay is bad. Chances are its simply a fuse, as fuses will blow before a relay.

obviously it may have to do with the installation of the new stereo, while installing some fuse may have blown or wires are cut or wires were not put back in order.

my question to you have you installed aftermarket stereo
sometimes wires get switched up
if not most likly a electrical failure or a relay

is the switch on the colum or on the dash

there should be a flasher under the dash looks like a metal can in fuse box if this is whst you call the relay then the switch is bad if not replace this it is a 552 flasher

Check your Ignition 1 & ignition 3 fuses in the inside fuse block,also check the body fuse 10amp in the inside fuse block.Keyless entry should take back off once you found the blown fuse.hope this helps

Not sure where the realy is, but there should be a 30 amp fuse in your fuse box. Did you check that?

i had some similar problems after i installed my aftermarket radio and i had to go back and rewire it and now the dash works fine. you might want to double check your wireing. i know wiring a stareo is simple but after rewiring i didnt have any more problems with dash lights

Most factory stereos are wired to the dash dimmer switch. Usually if the dash lights go out after an after market stereo installation, it is because the wire that originally went to the factory stereo is not used for after market stereos. Double check the fuses and ensure the wire that controlled the lights on the factory stereo is not grounding out on something.

you have a short circuit somewhere in whatever #19 fuse protects. you might want to consider replacing some of the relays that control those items.

Robert