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No power to passenger's side headlight

JKeshler
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JKeshler Enthusiast

JKeshler

Posted
Posted (edited)

I noticed that my passenger side headlight was out however the daytime running lamps still worked so I figured I blew a bulb. However when I put the bulb into the drivers side headlight it works fine. I used an electrical tester and I found that I have no electricity to the passengers side bulb. Is there a blown fuse to check or what should I do?

 

2014 GMC Sierra 1500 All Terrain

Edited by JKeshler
  • 3 years later...
rav3 Senior Enthusiast

rav3

Posted
Posted

Just curious, anyone find the fix?

rav3 Senior Enthusiast

rav3

Posted
Posted
4 minutes ago, tlaw91 said:

Probably has a blown BCM 3 fuse
F6DL
My first guess


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Where is "F6DL" located?

moraisjr7 Enthusiast

moraisjr7

Posted
Posted
15 minutes ago, tlaw91 said:

Probably has a blown BCM 3 fuse
F6DL
My first guess


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My issue is with the drivers side rather than the passenger side. Would it be a different BCM fuse or would I still want to look at the BCM3?  Also what’s of F6DL?

tlaw91 Enthusiast

tlaw91

Posted
Posted

Not looking at a diagram right now I think it’s F7DL
Fuse 7 Driver Left
So the fuse box on the left side of the dash
Hope this helps


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moraisjr7 Enthusiast

moraisjr7

Posted
Posted
7 minutes ago, tlaw91 said:

Not looking at a diagram right now I think it’s F7DL
Fuse 7 Driver Left
So the fuse box on the left side of the dash
Hope this helps


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I went through nearly every fuse including all the BCM fuses and they all seemed fine. I’m dropping the truck off tonight at my buddys garage and he’s going to take a look for me tomorrow. I’ll post an update as soon as he tells me what the issue is and what the fix for said issue is. 

rav3 Senior Enthusiast

rav3

Posted
Posted
8 minutes ago, tlaw91 said:

Not looking at a diagram right now I think it’s F7DL
Fuse 7 Driver Left
So the fuse box on the left side of the dash
Hope this helps


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ok, that's helpful. Here's an online layout of all fuses.

 

Fuse Layout Chevrolet Silverado 2014-2018

tlaw91 Enthusiast

tlaw91

Posted
Posted

Remember the BCM will shut off power if it deems the resistance is too high on the circuit
It’s not like an old school all power all the time
So it can get tricky with incorrect bulbs or high resistance in the underhood fuse block or not clearing the dtcs after a repair etc etc


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moraisjr7 Enthusiast

moraisjr7

Posted
Posted

Update: Truck wise, there’s nothing wrong with the truck wiring or fuses. My issue is with the truck side wiring for my fisher plow. Once he bypassed the plow wiring, the headlight worked fine but once he reconnected it, the light no longer worked. So I’ll have to take it back to the plow dealer and have him sort it out. Hopefully it’s a cheap fix. 

moraisjr7 Enthusiast

moraisjr7

Posted
Posted

UPDATE:

I Ended up needing a new Isolation Module for the plow setup. Apparently the old ones are infamous for causing headlight issues both truck side and plow side but this new module is a soft start module and should not have the same issues. Fingers crossed... $260 for parts and labor for the new module.

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