Question about 2004 Dodge Ram 2500

1 Answer

IS THERE A HEADLIGHT RELAY FOR HIGH/LOW BEAMS, OR IS THAT THROUGH THE MULTIFUNCTION SWITCH IN THE TURN SIGNALS ON THE STEERING COL. HAVE AN ALTERNATING PROBLEM. I HAVE HIGH BEAM ON FRNT. RIGHT,NO LOW BEAM AND LOW BEAM ON THE FRNT. LEFT WITH NO HIGH BEAM. CHECKED MY LAMPS-GOOD, GROUND-GOOD BUT ALSO HAVE A WESTERN PLOW SET-UP WITH LIGHTS, SAME THING HAPPENS WITH THE PLOW LIGHTS PLUGGED IN. IS IT POSSIBLE THE MODULE WESTERN PUT IN THERE IS BAD. AND IS THERE AN IN-BETWEEN MODULE FOR THE PLOW SET-UP? HELP ME SOMEBODY I'M A GREAT MECH. MYSELF BUT AM GOING CRAZY AND ELECTRICAL PRODUCTS ARE NORMALLY NONRETURNABLE AND CAN'T AFFORD TO MAKE A MISTAKE DURING THESE TIMES WITH NO INCOME COMING IN RIGHT NOW. OH ONE MORE THING, I AN AN ELECTRICIAN AND NOT A DUMMY. ANY INPUT WOULD GREATLY BE THE BEST PRESENT I GET THIS X-MAS. THANKS, *****

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  • 2brbeyers Dec 12, 2009

    THANKS MrMark52 I DO KNOW THAT MOPARS AND JEEPS DO SHARE A LIKENESS IN PARTSAND I THINK I WILL TAKE THAT RIDE TO THE LIBRARY FOR A WIRING DIAGRAM, I CAN FOR SURE KNOW WHAT MIGHT BE GOING ON IF I GET A FACTORY VISUAL. THANKS AGAIN

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Headlights in my '03 Jeep Cherokee are through a relay, both both light's are on the same relay I believe.

I would be suspect of any added modules which drive the headlights. Hopefully, they didn't "splice" in, but used one with factory connectors, so you can remove the module and reconnect the connectors as the vehicle was shipped from the factory.

When it's all said and done, you really need a wiring diagram for the vehicle. I can get one for my Jeep at the local repository library. Don't know about your truck. You may be able to find a diagram through some hard searching on the www.

Let me know if you need someone to bounce thoughts off of.

Posted on Dec 10, 2009

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2 Answers

All of my running lights and blinkers work and high beams but no low beams on my 1997 Chevrolet TahoeA


Headlamps Inoperative - Low Beams

Step

Action

Value(s)

Yes

No

DEFINITION: This diagnostic procedure should only be used if the high beam headlamps are operating properly and the low beams are inoperative.

1

Did you perform the Headlights System Check?
--
Go to Step 2
Go to Headlight System Check

2

  1. Turn the headlamp and panel dimmer switch to the ON position.
  2. Move the headlamp dimmer switch to the LOW position.
  3. Backprobe the headlamp dimmer switch connector with a J 35616-200 from cavity A to ground.

Does the test lamp light?
--
Go to Step 3
Go to Step 5

3

  1. Remove the daytime running lamp relay.
  2. Connect a J 35616-200 at cavity G5 to ground.

Does the test lamp light?
--
Go to Step 4
Go to Step 6

4

  1. Re-install the daytime running lamp relay.
  2. Backprobe cavity B at the high/low beam headlamp with the headlamp dimmer switch in the LOW position.

Does the test lamp light?
--
Go to Step 7
Go to Step 8

5

Replace the headlamp dimmer switch.

Is the repair complete?
--
Go to Headlight System Check
--

6

Repair the open in CKT 359 (PPL) between the headlamp dimmer switch and the daytime running lamp relay.

Is the repair complete?
--
Go to Headlight System Check
--

7

Replace the high/low beam headlamps.

Is the repair complete?
--
Go to Headlight System Check
--

8

  1. Inspect for an open in CKT 12 (TAN) between the daytime running lamp relay and S120, repair as necessary.
  2. Replace the daytime running lamp relay if no open was found in CKT 12 (TAN) between the daytime running lamp relay and S120.

Is the repair complete?
--
Go to Headlight System Check
--

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