2007 GMC Yukon - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


GMC/Chevrolet Truck/SUV When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made.

Reply
 
 
 
Thread Tools Search this Thread
Old 05-21-2012, 05:02 PM   #1
Junior Member
Thread Starter
 
Join Date: Jan 2012
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
bloomco is on a distinguished road
Default 2007 GMC Yukon

2007 GMC Yukon battery dead this morning. Jump started, headlights will not shut off. Cannot turn headlights off manually with switch. Checked relay, fuses-ok. Unplugged BCM, multifunction switch, headlight switch, headlights stay on. Going by the wiring diagram there is 1 wire that runs from low beam relay to BCM. I am thinking 2 options- bad wire or something bad inside fuse box. Anyone have any other ideas?
bloomco is offline   Reply With Quote
Old 05-21-2012, 07:46 PM   #2
Junior Member
Posts like a V-Tak
 
Join Date: Mar 2012
Location: west of chicago, il
Posts: 26
Thanks: 0
Thanked 0 Times in 0 Posts
greg409 is on a distinguished road
Default

Forgive me, but it'* not the driving lights?

My sonoma headlights are on anytime the engine is running (@ a lower voltage)

Were any extras added recently? - something that may have been spliced into a convenient hot/ground wire?

Or as you wondered, short in fuse box, tho' that would be my last guess - I'd imagine 12volts from the fuse goes to headlight relay, the switch closes the relay sending on to the headlights.

luck,greg
greg409 is offline   Reply With Quote
Old 05-22-2012, 01:05 PM   #3
Junior Member
Thread Starter
 
Join Date: Jan 2012
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
bloomco is on a distinguished road
Default

No Greg, not driving lights. The DRL is also a separate relay. Tried swapping relays. And the headlights do not shut off with engine not running, key out. Thanks for your thoughts.
bloomco is offline   Reply With Quote
Old 05-22-2012, 01:41 PM   #4
Senior Member
Certified GM nut
 
2k2cse's Avatar
 
Join Date: Jan 2011
Location: Newfoundland, Canada
Posts: 2,112
Thanked 18 Times in 17 Posts
2k2cse has a spectacular aura about2k2cse has a spectacular aura about
Default

It sounds like a short somewhere. Have you tried disconnecting the battery to let them go out, then reconnecting it?
2k2cse is offline   Reply With Quote
Old 05-22-2012, 01:43 PM   #5
Senior Member
True Car Nut
 
jwfirebird's Avatar
 
Join Date: Dec 2009
Location: western,ny state
Posts: 9,616
Thanked 563 Times in 481 Posts
jwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond repute
Default

dont have time to look in the drawings but most of the relays are ground controled so if the control wire for it was chafed touching ground it would be always on
jwfirebird is offline   Reply With Quote
Old 05-22-2012, 03:09 PM   #6
Junior Member
Thread Starter
 
Join Date: Jan 2012
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
bloomco is on a distinguished road
Default

Yes, we did have battery unhooked. Did not help. We agree the wire to the relay is gounded somewhere. Just have to find it.
Thanks for the input.
bloomco is offline   Reply With Quote
Old 12-31-2013, 10:27 PM   #7
Junior Member
 
Join Date: Dec 2013
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
scubaduo is on a distinguished road
Default

I had this same issue and found that when I pulled the top of the under hood fuse block toward the driver side fender the lights went out, then came back on when let go. I removed the fuse block, cable connectors, and fuse block housing/mount. The wiring harness under the housing was routed over and rubbing against an edge of the fender body. I taped a piece of old inner-tube over the fender edge for the wiring harness to rest on, then put everything back together. So far problem solved!
scubaduo is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
2007 Yukon low oil pressure RobPegausch GMC/Chevrolet Truck/SUV 2 12-11-2013 11:16 AM
2007 yukon xl no crank jaire8886 GMC/Chevrolet Truck/SUV 13 09-21-2013 08:47 AM
2007 Yukon burning oil acarrera GMC/Chevrolet Truck/SUV 15 05-03-2011 11:43 AM
2007 Yukon XL Burning Oil maineac89 GMC/Chevrolet Truck/SUV 9 01-04-2011 08:37 PM
GMC Yukon Seat = $99,999,999? Hans Lounge 9 11-19-2007 04:31 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 01:20 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.