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Old 08-12-2019, 10:48 AM   #1
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2007 Workhorse trailer wiring

We have a 2007 Fleetwood Fiesta that we will be towing our Jeep Wrangler behind and it appears that the power wire in the 7 Pin plug on the coach does not have power to it. Is there a special fuse box somewhere for the trailer wiring? The turn signals, brake lights and running lights all power up but I need the power wire for the Mopar RV wiring harness to run the lights. Thanks for any help.
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Old 08-12-2019, 10:59 AM   #2
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I'm confused. You say you have power for running lights. So what additional lights do you need power to?





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Old 08-12-2019, 11:27 AM   #3
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I'm confused. You say you have power for running lights. So what additional lights do you need power to?





Mike
Nothing on the Jeep works while plugged in to the MH. Checking with a test light there is no power to the "supposed" hot wire in the 7 pin plug on the MH. There is power to each turn signal, brake light and running lights. My understanding is the Mopar wiring harness requires that hot wire to operate and I can't figure out why there is no power to it.
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Old 08-12-2019, 10:57 PM   #4
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You may have to run a separate fused wire to your chassis or house batteries. Can also get 12V from the generator which will be closer.

I also needed to install a converter to combine the L/R turn signals with brake light to connect to trailer wiring. Electric brake blue wire should be marked and located under dash.
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Old 08-13-2019, 06:22 PM   #5
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You may have to run a separate fused wire to your chassis or house batteries. Can also get 12V from the generator which will be closer.

I also needed to install a converter to combine the L/R turn signals with brake light to connect to trailer wiring. Electric brake blue wire should be marked and located under dash.
The interesting thing is I have a black wire going to the #4 pin in the plug but no power and I am having a heck of a time trying to trace where that black wire goes from the plugin. There is no power to the wire so I assume it is either not connected or it is fused and blown.
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Old 08-13-2019, 07:14 PM   #6
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2007 Workhorse trailer wiring

Quote:
Originally Posted by mtnxr View Post
Nothing on the Jeep works while plugged in to the MH. Checking with a test light there is no power to the "supposed" hot wire in the 7 pin plug on the MH. There is power to each turn signal, brake light and running lights. My understanding is the Mopar wiring harness requires that hot wire to operate and I can't figure out why there is no power to it.


I have a 6 pin but had to run a dedicated wire from the batteries to a pin on my plug for a charge line.
White/Gray probably backup lights on the chassis harness? Looking thru some old notes not sure but there is a electric brake wire too.
Ok remember this I had to discover this. The plug wire colors do Not necessarily coincide with the Chassis Harness wire colors. You will need to reveal where they are spliced to see what you have. OK I found my notes hope this helps in your discovery.

Chassis Harness Colors below:

Wh/Yel =LF
Wh/GR = RT
Wh/BK = Ground
WH/GRAY= Backup lights(must be in gear)
Gray= Tail/Marker
Blue = Electric Brakes

I hope thus helps I had to edit numerous tines for clarity.
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Old 08-13-2019, 08:55 PM   #7
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I have a 2004 WH chassis and can tell you on mine as apparently wired from new, both the brake and the power feeds to the trailer plug terminate in the dash area. I forget the colours but I needed to install inline fuses and connect both of them.
They’re run properly through the chassis, just need to be connected.
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Old 08-14-2019, 10:42 AM   #8
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Originally Posted by Mountain Art View Post
I have a 2004 WH chassis and can tell you on mine as apparently wired from new, both the brake and the power feeds to the trailer plug terminate in the dash area. I forget the colours but I needed to install inline fuses and connect both of them.
They’re run properly through the chassis, just need to be connected.
That is what I am thinking. Now if I can just find the wires and hook them up I will be a happy guy! LOL
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