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Old 05-14-2015, 03:54 PM   #1
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Trailer wiring harness

Need some help here. Got a 2004 journey on a freightliner chassis. Last week I lost my right turn signal and of course my right brake light. I've checked the obvious,connector plug at the 6 way, and followed the wire loom as far as the drive line and then it really got buried in all the other looms. I had assumed at some point the trailer harness would be spliced into the rear coach light harness,but it seems they are both separate. So, does anyone out there know where this harness originates? Also could you enlighten me as to how these electric brake feed is incorporated into the service brakes. I have power back there when I step on the brake, but it boggles me as to how it regulates the amount of voltage going to the trailer without a controller. Thanks in advance to anyone who can help me on this signal issue.
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Old 05-14-2015, 08:48 PM   #2
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You might have separate fuses for trailer lights.

For brakes, the only way I know that you get trailer brakes is with a controller.
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Old 05-14-2015, 10:20 PM   #3
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Quote:
Originally Posted by jesilvas View Post
You might have separate fuses for trailer lights.

For brakes, the only way I know that you get trailer brakes is with a controller.
He is right.
How many pins on the trailer connection? How many on the MH connection? The wiring requires at least 5 pins to get power to the trailer electric brakes and other required lighting; AND,an aftermarket brake controller.
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Old 05-15-2015, 07:51 AM   #4
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I would assume you have checked the bulb .... but you should also have a fuse that is RT Turn/Brake on the coach ...
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Old 06-18-2015, 08:51 AM   #5
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I too have the same problem. Right turn on tow. Jeep lights are good on its own. I too have Freightliner chassis. Called fleetwood, they said FREIGHTLINER. Freightliner said arens box which is the 12 volt controller board which is in a back compartment. I had a pinched cable with shorted wire. Replaced cable and no right turn/ brake lite. Scoured arens box fuses and nothing seems amiss. The coach lights work fine. I am at a loss. Thinking about replacing arens board. Will keep you informed
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Old 06-18-2015, 09:39 AM   #6
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Freightliner chassis do indeed have separate circuits and fuses for trailer lighting. They usually end up in a rear bay on the passenger side after the RV builder adds the body.
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Old 06-18-2015, 10:29 AM   #7
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I see nothing like that on mine. I think I see the trailer wires plugged into the 12 volt controller board here you said, passenger rear. I see nothing that relates to trailer fuses. I am very frustrated with this. No schematics available, shooting in the dark. Appreciate help. Dean
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Old 06-18-2015, 02:13 PM   #8
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Gary, quit trying to follow the wiring. I'm knew to a Freightliner chassis, but the fuses for mine are in with the engine batteries (right rear passenger bay). There is a box in there with several fuses. The right and left turn signals are individually fused on mine.

You need to find that fuse panel/box.
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Old 06-18-2015, 03:44 PM   #9
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On my 2004 those fuses are in the shore power compartment behind a removable panel. That panel looks or appears to be one the compartment walls but has six (maybe 4) screws holding that panel. There are several fuses and small black boxes behind that panel.
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Old 06-19-2015, 07:24 AM   #10
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Found my problem in the electric bay,2004 journey, behind the fake wall as stated here previously. 20 amp mini fuse for right turn burned out. A very simple fix once you find the fuse box. Don't know why they keep moving it around the coach though.like playing hide and seek to find some of this stuff.
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Old 06-19-2015, 08:14 AM   #11
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This is beginning to sound like a snipe hunt.
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