any mechanics?

[Tappen]

I have a bit aof a problem with my 1990 gmc sierra, i currently have no high beams drivinglights or tailights, this all happened outa nowhere, i have break all my signals and low beams, but the low beams only turn on with key on and the light switch on the dash doesnt work. If anyone could help me with this itd be much appreciated.

[Bills Custom Calls]

Did you check your fuses
You should have 2 fuse boxes 1 under the hood and 1 in the dash
If the owners manual is still with the vehicle that will help you a lot

If all your fuses are good then it could be as simple as putting a new switch in

That is where I would start

[FinsnFur]

I'd lean towards the headlight switch too.

[pitw]

I'd lean towards the headlight switch too.

Some folk lean which ever way the wind is blowing  . 

[Tappen]

it was the switch, put a new one in, and its good to go, thanks guys.

[FinsnFur]

  HaHa Barry

[Bills Custom Calls]

Not a bad guess for a Northern Hill Billy

Your Welcome!!