NO LIGHTS ON TRUCK AND NO LIGHTS ON PLOW
NOTE:
It is unusual to have both high and low beams missing from both the plow and the truck. Even
with no power to the headlight relays they should route the truck lighting signals to the truck headlights.
Verify that both high and low beams are missing from both the plow and the truck.
Check that relays RL1 (low beam) and RL2 (high beam) are installed and firmly seated in their holders.
DID THIS FIND THE PROBLEM?
No.
Yes, done.
|
Check that J5 (vehicle lighting system) connector is firmly seated in P5.
DID THIS FIND THE PROBLEM?
No.
Yes, done.
|
Check that the driver side and passenger side headlight adapters are firmly seated in the truck head
-
light connectors.
DID THIS FIND THE PROBLEM?
No.
Yes, done.
|
Perform Under Hood Harness Test Procedure.
DID UNDER HOOD HARNESS TEST OK?
No.
Yes.
|
See Special Problems Section.
|
DID THE TRUCK WIRING PROVIDE LOW AND HIGH BEAMS INTO THE HARNESS?
No.
Yes.
|
There may be multiple problems.
|
See Special Problems Section.
|
Refer to vehicle owner’s manual.
Check vehicle lighting fuses.
DID THIS FIND THE PROBLEM?
No.
Yes, done.
|
See Special Problems Section.
28 Lighting Problems
