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Electrical 3rd Gen Dodge Ram Electrical Problems and Questions.


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  #1  
Old 10-28-2010, 12:28 AM
cadco cadco is offline
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Default No left hand signal light on trailer

2003 ram 2500 with factory trailer wiring
I have no left signal at either of the trailer plugs (4 pin or RV)
harness is good at back, no corrosion, good ground, no power to LH signal on trailer
I understand there are relays below the fuse box on a board.
are they serviceable?
What is the part name/number of the board?
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Old 10-28-2010, 10:03 AM
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This may aid in your diagnosis. Start by checking the fuse and then move onto the realy coil ground.

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  #3  
Old 10-30-2010, 10:14 AM
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Randy
Thanks for the diagram I will check it out this morning
Best regards
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Old 10-30-2010, 07:55 PM
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are you sure the problem is on the truck and not on the trailer itself??
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Old 11-02-2010, 12:48 AM
cadco cadco is offline
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Yes The trialer checks out, it is in the truck.
Thanks.
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Old 11-02-2010, 12:55 AM
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Randy is the IPM below the fuse box or is it some place else?
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Old 11-02-2010, 03:22 AM
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The IPM is the 'Fuse Box'. Fuses and relays on top.....electronics below.
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Old 11-04-2010, 12:35 AM
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Brad thanks for the clarification.
It does not appear that this truck has the trailer tow relays.
Is this possible?
Or am I missing something.
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Old 02-06-2011, 12:05 AM
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Ive got the same problem with mine. What were ya able to find out?
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Old 02-06-2011, 10:18 PM
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Default

had the same issue with mine except it was the right turn.i chased it all the way to the fuse box(isp) and could not see any problems or broken wires in the plugs.thought it was the module on the side of the fuse box(side closest to the drivers fender) so i replaced it and still didnt work.not sure if thats the bcm,maybe someone will know.anyways i went with a powered towing module that is mounted under my box and feed from 12v directly from the battery.havent had any issues yet with it. i pulled all the fuses for the trailer circuits aswell.when i spoke to the one electrical tech he told me that the trailer wiring systems in these trucks where borderline sufficient if you have a trailer with mutiple lights because of the amperage draw.hope this helps.let me know if you need any other info.
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