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Car expert, ASE Certified Technician
Category: Car
Satisfied Customers: 10370
Experience:  ASE MASTER TECHNICIAN,30 YRS EXPERIENCE
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low-beams went out at once on my 2007 GV. High-beams..Checked fuses

Customer Question

Both low-beams went out at once on my 2007 GV. High-beams still work, fogs still work. Checked fuses, all good. Swapped relays around, no change. Hand brake switch appears to work based on icons in speedo. Likely cause? Where can I get a wiring diagram? Haynes hasn't published one, probably too low a volume vehicle.
Submitted: 7 years ago.
Category: Car
Expert:  Car expert replied 7 years ago.

there is 2 low beam fuses , see if theres power at these 2 fuses.

the ground side of the headlights are controled by the body control module . the module may be bad so we need to do some tests .

graphicgraphic

Customer: replied 7 years ago.
OK, will test this evening, on my work lunch break right now.
Expert:  Car expert replied 7 years ago.
ok
Customer: replied 7 years ago.

Hi Sean,

 

Ok, got 12v at the fuses, and I can hear the headlight relay click when I turn on the headlight switch on the turn indicator stalk. Do you have higher rez versions of the wiring diagrams? these are hard to read.

Expert:  Car expert replied 7 years ago.
TURN ON THE HEADLIGHTS AND AT THE DIMMER SWITCH IF YOU GROUND THE RED/BLUE WIRE THE LOW BEAMS SHOULD COME ON , IF THEY DO THE THE COMBO SWITCH IS BAD