Question about 2004 Dodge Ram 1500

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The left trailer light is not working. I traced it to the Integrated Power Module( fuse box). The yellow wire is dead. The price for a new IPM is high and there is a 29 unit backorder right now with no promise date. I replaced the FMC(Front Control Module) on the side of the IPM with no results. I was told the built in relay in the IPM is blown. I would like to tap into the regular trucks lights and bypass the faulty IPM but I am not sure which wires to tap into. The shop manual states the Darkgreen/White wire feeds the left turnsignal but I get no voltage on it when signal tracing. Do I need a converter of some kind?

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SOURCE: My 2003 tacoma with factory 4 pin trailer harness is bad.

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SOURCE: Right turn signal on trailer connect is not getting the turn sgna

a bad earth or grounding will cause t!

Posted on Jul 18, 2009

pops296
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SOURCE: LEFT TRAILER TURN SIGNAL DOES NOT WORK

I have seen once before that the fuse box was bad on a 2003 Dodge 3500. I had power in and nothing out. We had to replace the box. Not cheap! Hope it is simple like a loose connection though. I think I had to pull the inner fender on the drivers side to access the bottom of the fuse box. Pain in the ****, but...

Posted on Oct 01, 2009

GodBlessU
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SOURCE: 2005 f-150. travel trailer right

Hi

1. Check to see if there was any trailer wiring spliced in, underneath, by the back bumper, if there is or was splicing done you may have wires corroded through. Look for green color on the wires.

2. Check the bulb sockets. You have to open the tail gate to get to the 2 screws on the tail light lenses.

3. Make sure you have good ground at the tail lights.


Please get back to us if you have further query else please accept the suggestion.

Thank you for contacting fixya.com


Posted on Mar 22, 2011

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1 Answer

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Hey Bob, how's it going ? The two big ones there with the 125 amp fuse or breaker , they go to the rear fuse block ,that's power supply ! power supply for trailer hook-up comes from rear fuse box. The other wire supply's the body control module ! 42 TR PARK Fuse 10A Trailer Connector .
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There is no under dash fuse block in this vehicle, only the one under the hood. Here is the description from Dodge.


DESCRIPTION The Integrated Power Module (IPM) is a combination of the Power Distribution Center (PDC) and the Front Control Module (FCM). The IPM is located in the engine compartment, next to the battery. The PDC mates directly with the FCM to form the IPM. The PDC is a printed circuit board based module that contains fuses and relays, while the FCM contains the electronics controlling the IPM and other functions. This IPM connects directly to the battery positive through a four pin connector. The ground connection is through two other connectors. The IPM provides the primary means of voltage distribution and protection for the entire vehicle.

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your vehicle has a "integrated power module". its a fancy name for a smart fuse box. What likely happened is there is a problem with the trailer wiring. The power module detected the fault and shut down the running lights. The power module will need to be reset at the dealer.

Fuse 15 is a 50 amp fuse for the park lamp relay
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After it is reset I would not plug in the trailer until the fault is located and repaired.

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I have seen once before that the fuse box was bad on a 2003 Dodge 3500. I had power in and nothing out. We had to replace the box. Not cheap! Hope it is simple like a loose connection though. I think I had to pull the inner fender on the drivers side to access the bottom of the fuse box. Pain in the ****, but...

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