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Dan
Dan, Technician
Category: GM
Satisfied Customers: 23789
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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I have a 2005 GMC Savana, the low beam headlights are not

Customer Question

I have a 2005 GMC Savana, the low beam headlights are not working. The high beams work, the daytime driving lights work, the turn signals work. I've swapped relays between my High-Beam and Low-Beam relays and it still happened, I've also replaced the fuses and bulbs.
Submitted: 1 year ago.
Category: GM
Expert:  Dan replied 1 year ago.

Hello, my name is***** sounds like the body control module may have failed. Unplug body control module and ground the pink/white wire at pin A4. If this turns on low beams then body control module needs to be replaced. If not pink/white wire between body control module and relay needs to be repaired/replaced. Let me know if you have more questions or if there is anything else I can do to help. Thanks.

Customer: replied 1 year ago.
I will check that first thing in the morning, I only checked the following fuses and relay.
Fuses
42 - RH - LOBM (10A)
43 - LH - LOBM (10A)
Relay
58 - HDLP-LOBMWould any other fuses cause Lo-Beam issues, any of the TCB fuses? I don't think it would be 19 - TCB because everything else works like the Hi-Beam, Interior Lights, Driving Lights etc. Could it be as simple as any other TCB fuse?
Expert:  Dan replied 1 year ago.

There is no fuse that would cause this, here is a wire diagram so you can see how system works. Let me know if you have questions, thanks.
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https://www.dropbox.com/s/7xso8zdtg1cc73e/clb1.pdf?dl=0
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