DS low beam out

Connor M · Sep 16, 2019

My driver's side low beam does not work. I tried other bulbs, then broke out the test light, and I get nothing in the low beam side of the plug or stabbing the wire further back. Before I tear apart the harness, is there anything else easy I could check? I assume the headlights are on the same fuse so I ruled out that as a possibility.

PO had a plow setup he pulled out of the truck prior to sale. Don't think that has anything to do with it but I'm throwing that out there.

White_monster · Sep 17, 2019

Go back in the harness until the next connection and see if you have power.

eng53ine · Sep 17, 2019

Does it have separate fuses for each side? I know some vehicles do, never paid attention to it in fords.

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Connor M · Sep 17, 2019

So there are separate fuses for h/l and r/l but those were good and I had power at the fuse panel. Apparently the BCM controls the lights, there are no traditional relays. For now I rigged up the low beams to work all the time off key on power, and I will have the BCM replaced but it’s enough for me to drive at night with at the moment.

Connor M · Oct 2, 2019

Update on this- it was a BCM issue. While I wait for my new BCM to come in, I just wired both lows up to a key-hot fuse (both so that it doesn't look weird driving around with one headlight on in the day) and it's working great. PO was driving around like that for a while, the wire had become dislodged and I clipped it thinking it was something to do with some plow wiring. One phone call and I was back in business.