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Dodge Repair/headlights not working: '03 ram 1500


My headlights worked only on low beam then one stoped working so replaced both of them now only drivers side high beam is working then I replaced headlight switch and same thing one high beams working I checked power fuses and there good checked wirez they look fine can not figure out whats wrong.the truck is a 2003 dodge ram hemi mag 1500 5.7

Hi John,
The headlamp bulb filaments are each independently wired and come from the integrated power module on the back side of which are a number of multi-wire plugs. The gray, 26-pin  plug is where the four wires to the headlamp bulbs come from. Here are the assignments:
pin 6 white/dark green left low beam
   7 white/light blue right high beam
  15 white/light green left high beam
  22 white/tan         right low beam
The wire colors should be identical at the bulb sockets. The ground wires are black/light blue at the bulb sockets
So see whether you are getting 12v as requested at the C7 plug and at the bulb sockets. There are some connectors along the way which might be at fault or the wires could be flakey. Otherwise there is an issue inside the integrated power module (the part called the front control module).
So let me know what you find.

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Roland Finston


Get a Free Fast answer to your repair question about a Chrysler/Dodge/Plymouth car, minivan, SUV, or truck. Problems with electronically controlled engines and transmissions as well as body wiring problems are my specialty. This free troubleshoot advice forum helps you diagnose faults, minimize repair costs or do-it-yourself.

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