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Electrical 3rd Gen Dodge Ram Electrical Problems and Questions.


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  #1  
Old 11-22-2008, 07:29 PM
929nitro
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Default Headlight command module

Hey everyone. I am posting here for my dad (it is his truck), he has a 2004 2500 and he has been having some problems with his headlights. Every now and then his drivers side headlight will go out, and usually stay out. Also when this happens, if he is towing a trailer, the trailer running lights will also go out. There doesn't seem to be any consistency to this happening, sometimes it will be out when he turns the lights on, other times it will just go out as he is driving down the road. Nothing seems to fix the problem either.

He has been told, by a dealership, that it is the headlight command module. I have two questions that I can hopefully get some help with. First question is, where is the location of the drivers side headlight command module? The second questions is, does anyone have any other ideas of what could be causing this problem? Thank you in advance for all of your help.
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  #2  
Old 11-23-2008, 06:12 AM
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Hi 929nitro ! Sorry I can't help you with your problem, but I guess someone else here will. Just wanted to say WELCOME and enjoy your stay! I hope you'll solve your problem. p.s. 929nitro... do you have a Nitro?
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Old 11-24-2008, 12:11 PM
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Originally Posted by LYC79 View Post
Hi 929nitro ! Sorry I can't help you with your problem, but I guess someone else here will. Just wanted to say WELCOME and enjoy your stay! I hope you'll solve your problem. p.s. 929nitro... do you have a Nitro?
I have a 21' Nitro bass boat.
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Old 11-24-2008, 12:23 PM
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I have a 21' Nitro bass boat.
Ah ok ... a bass boat ... sorry I was thinking about a Dodge Nitro !
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Old 11-24-2008, 12:29 PM
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It sounds like a relay somewhere, but I have no idea where. Try unplugging the fuse that controls the trailer brake and see if that helps. It could be that the extra electrical load from the trailer is popping a relay. ????

Just a thought.

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Old 12-27-2008, 11:13 AM
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Not sure, it could be your daytime running lights module? But your headlights, when turned on, should bypass the module, but check to make sure.
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Old 04-06-2010, 06:33 PM
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Hello I got a 2000 dodge ram. The daytime running light's stay on when ignition is shut off. If anyone has any info on what it may be. Thank you.
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Old 04-06-2010, 06:35 PM
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Quote:
Originally Posted by locknload View Post
Hello I got a 2000 dodge ram. The daytime running light's stay on when ignition is shut off. If anyone has any info on what it may be. Thank you.
Welcome to the forum bud, we're glad to have you here. Go ahead and start a new thread in the "newbie checkin" section, we'd love to hear about you and your truck

How long do they stay on for?
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Old 04-06-2010, 06:40 PM
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Time to stop blindly guessing, people! First of all, whoever used the phrase "headlight command module" doesn't have a clue what they're talking about. Chances are the FCM (front control module) is at fault. They have a fairly high failure rate and as you can see by the diagrams below, that it controls the lights that are malfunctioning.



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Old 04-06-2010, 06:44 PM
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Quote:
Originally Posted by locknload View Post
Hello I got a 2000 dodge ram. The daytime running light's stay on when ignition is shut off. If anyone has any info on what it may be. Thank you.
Most likely a bad DRL module.
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