Parking & dash lights out. Fuse blows

[cashmoneyspeed]

The other day i installed a different radio head unit into my '86 regal. Just a simple 11 wire hook up. Other than that i haven't touched the electrical system recently.

I noticed the dash lights, parking lights front/back, & license plate light dont turn on. The fuse was blown and the new one blew right away. Interior lights, headlights, radio all work. Anyone have a wiring diagram or similar issue like the headlight switch shorting out?

 

[pontiacgp]

Since it just happened after you installed the radio I would suspect the wire lead that powers the light for the radio may be grounded.

 

[Geo's66]

Wouldn't you want the radio head unit grounded? Learning myself that's why I ask, thanks

 

[pontiacgp]

yes you want the head unit to be grounded but you want to make sure you don't create ground loops which cause the radio to hum/buzz

 

[cashmoneyspeed]

From the radio There is only black wire to ground, red wire to factory orange wire for constant 12v, yellow wire that i have wired to fuse box, then the blue remote wire to an amplifier and the 8 speaker wires.

Which would be for illumination?

 

[pontiacgp]

illumination would be an orange wire. Have you unplugged the radio to see if the fuse still blows?

 

[cashmoneyspeed]

Fuse was fine with the radio unplugged. The problem ended up being that i had the ground from the radio to a dark brown factory wire which seems to be the dim signal wire. I switched it back to the black/ground wire and capped off the dark brown wire. Everything works again.