HI
I have a 01 Yukon.
Last night I went to high beans and they didnt come on.But the foglights stay on and the high beam indicator in the gauge cluster doesnt light up either.

Do I have a bad dimmer switch.relay etc..where should I start to look for the problem..

any help or suggestions would be helpful..thanks

 

Start with the headlights, relay, then your headlight switch on the dash and finally your dimmer switch on the column

 

check the under hood fuse for the hi beams, could be loose or bad

 

ok thanks...headlights R ok..so R the fuses..and so R the relays..I will check dimmer switch next

thanks again