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Daniel Wilson
Daniel Wilson,
Category: Medium and Heavy Trucks
Satisfied Customers: 5161
Experience:  Owner at DJ Wilson
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Passenger side headlight low beam not working on a M2

Customer Question

Passenger side headlight low beam not working on a M2 Freightliner truck
JA: What is the complete model and serial number of your machine?
Customer: 1FVACXDT4HHHS8773
JA: Are you fixing this yourself? What have you tried so far?
Customer: It has 1 active code SA 33 code 6891 fmi 4
JA: Anything else you want the equipment mechanic to know before I connect you?
Customer: So far I checked bulb, wiring, which both wires are grounded.
Submitted: 12 days ago.
Category: Medium and Heavy Trucks
Expert:  Daniel Wilson replied 12 days ago.

Hi my name is***** will be glad to try to help. What year chassis is this?

Expert:  Daniel Wilson replied 12 days ago.

6891 4 CHM power feed
VBAT1 — low voltage
The output circuits that are powered by VBAT1 will all be
inoperative. Other fault codes may be present, but troubleshoot
for this first. The fuse in the main PDM powering this circuit may
be open. The root cause could be excessive loads on an
output, or a short to ground in the VBAT1 supply to the CHM

Expert:  Daniel Wilson replied 12 days ago.

Test all fuses for power on both sides with the key on. Replace any with power on only one side. Thoroughly inspect the wiring harness and connector pins for damage and corrosion and the lighting circuit for faulty bulbs, grounds, etc. Let me know.

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