2021 F150 Headlight

761 Views | 9 Replies | Last: 3 mo ago by burtonsnow
FunnyFarm14
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AG
Caught a rock on the lease road now the passenger headlight is cracked - allowed in some moisture. Quad Beam LED's

Light was working up until recently but now it blows the fuse constantly. Even with headlights off the fuse blows immediately.

My thoughts are that the moisture fried the light and fried the HCM? Because I don't see how killing the headlight switch on the dash would still send power to the light unless the HCM shorted?
But I still have low/high beams on the remaining light.

Being that its my rig ride and my time in town is always when the parts houses are closed figured I'd ask before ordering both a headlight and an HCM? Is there a way to test the HCM?

OR better question since I'm not fully aware if the new HCM will need to be programmed or not, would this be a better dealer/shop question? I just hate not having the answer before I drop it off to someone's who's incentive is to jack up labor costs as much as possible
1agswitchin4lanes
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See if there are any codes?

I'd buy a used unit and see where that gets you.
JamesPShelley
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1agswitchin4lanes said:

See if there are any codes?

I'd buy a used unit and see where that gets you.

Codes for a headlight?
sts7049
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lots of modules these days gramps
FunnyFarm14
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Define "used unit"..... because I googled the closest dealers' phone number and now am looking at a newer used truck instead of biting the bullet on a headlight.... LOL
FunnyFarm14
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JamesPShelley said:

1agswitchin4lanes said:

See if there are any codes?

I'd buy a used unit and see where that gets you.

Codes for a headlight?

I didn't think to check but I presume the BCM will show a code if I plugged in my forscan. Good call-will have to do that when i'm not dodging frac sand trucks.
I forget they will log codes for everything these days
txyaloo
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JamesPShelley said:

1agswitchin4lanes said:

See if there are any codes?

I'd buy a used unit and see where that gets you.

Codes for a headlight?

...your 25yr old 986 has headlight modules and sets codes in them.
JamesPShelley
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txyaloo said:

JamesPShelley said:

1agswitchin4lanes said:

See if there are any codes?

I'd buy a used unit and see where that gets you.

Codes for a headlight?

...your 25yr old 986 has headlight modules and sets codes in them.

Thanks. News to me.

The "Gramps" moniker ringing correct.
1agswitchin4lanes
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JamesPShelley said:

1agswitchin4lanes said:

See if there are any codes?

I'd buy a used unit and see where that gets you.

Codes for a headlight?


Yes. BCM will detect issues.
burtonsnow
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Edit: nvm
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