Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×


Reply
 
Thread Tools Display Modes
Old 07-05-2022, 08:43 PM   #1
Junior Member
 
Join Date: Jul 2022
Posts: 3
Camper wiring issue - Iím stumped.

I have a 2005 F250 and a 2021 FR Salem. When I picked up the camper the dealership said my truck trailer tow wiring was bad, as the right turn signal didnít work on the camper. I verified this with a 7-pin plug tester - right flasher signal was bad. Had the Ford dealership fix it. Now tests fine on the plug tester but the right camper turn signal still does not work.

I hook the truck up to my car hauler and the right turn signal DOES work. So I of course think itís just a blown bulb on the Salem. But hereís the weird part - when I hook the Salem up to my 2014 Durango - all lights work properly. 😬

What could possibly be causing this?
EVOlutionary is offline   Reply With Quote
Old 07-05-2022, 09:56 PM   #2
Senior Member
 
Join Date: Feb 2018
Location: TEXAS
Posts: 6,182
Got to be the Ford if it works when you hook it up to the Durango and all lights work properly.
__________________
2015 Dynamax REV 24TB class C
Reverse_snowbird is online now   Reply With Quote
Old 07-06-2022, 06:27 AM   #3
Site Team
 
Join Date: Mar 2008
Location: Southwest Alabama
Posts: 9,752
Does your car hauler have LED lights?

It could be the Ford circuit failing when put under load. If possible, I'd hook it to another trailer that has incandescent bulbs and see if it works then.
__________________
Salem 29RKSS Pushing a GMC Sierra 2500HD!
Gotta go campin!
Bama Rambler is offline   Reply With Quote
Old 07-06-2022, 11:16 AM   #4
Junior Member
 
Join Date: Jul 2022
Posts: 3
Quote:
Originally Posted by Bama Rambler View Post
Does your car hauler have LED lights?

It could be the Ford circuit failing when put under load. If possible, I'd hook it to another trailer that has incandescent bulbs and see if it works then.
It does indeed. Good idea. Iíll check that out.
EVOlutionary is offline   Reply With Quote
Old 07-06-2022, 05:25 PM   #5
Senior Member
 
Join Date: Nov 2017
Posts: 1,448
Quote:
Originally Posted by EVOlutionary View Post
It does indeed. Good idea. Iíll check that out.
Does it still work at the plug?
aircommuter is offline   Reply With Quote
Old 07-06-2022, 09:30 PM   #6
Junior Member
 
Join Date: Jul 2022
Posts: 3
Quote:
Originally Posted by aircommuter View Post
Does it still work at the plug?
The 7-pin on the truck? I have a plug-in tester and all lights work properly on the tester.
EVOlutionary is offline   Reply With Quote
Old 07-06-2022, 11:21 PM   #7
Senior Member
 
Join Date: Nov 2017
Posts: 1,448
Quote:
Originally Posted by EVOlutionary View Post
The 7-pin on the truck? I have a plug-in tester and all lights work properly on the tester.
Sounds like the trailer load doesnít agree with the truck control module.
aircommuter is offline   Reply With Quote
Old 07-07-2022, 03:52 AM   #8
Senior Member
 
Join Date: Apr 2022
Location: Tarpon Springs FL
Posts: 144
Quote:
Originally Posted by aircommuter View Post
Sounds like the trailer load doesnít agree with the truck control module.
multi meter will tell you if each pin is working and how much voltage it has


5 minute job ... you just need someone to operate brakes turn signals etc while you test
__________________
Tarpon Springs FL
2022 Salem 24RLXL
Aussieguy is offline   Reply With Quote
Old 07-07-2022, 08:54 AM   #9
Senior Member
 
Join Date: Sep 2016
Location: Colorado
Posts: 1,260
I had the same issue with my Chevy. Turned out to be the turn signal module. Trucks of that vintage use a multi pronged module that separates the truck lights from the trailer lights. They are also fused separately. YouTube would be a great place to start to find the location and procedure on how to replace it. The turn signal switches are not like the old days. Mine was 60 bucks, and was a ten prong connector. My guess is your Ford is similar.
__________________
2003 Duramax
2017 Crusader 315

2016 Boston Whaler Montauk 150
Former Montana owner
Colorado Cruiser, Over the Pass and Down the Hill
Comanchecreek is offline   Reply With Quote
Old 07-07-2022, 04:29 PM   #10
Senior Member
 
Join Date: Nov 2017
Posts: 1,448
Quote:
Originally Posted by Aussieguy View Post
multi meter will tell you if each pin is working and how much voltage it has


5 minute job ... you just need someone to operate brakes turn signals etc while you test
While the meter will give information it is still controlled by the module which will shut off the feed for the load being too low or high. The module could also be defective.
aircommuter is offline   Reply With Quote
Old 07-07-2022, 04:46 PM   #11
Senior Member
 
Join Date: Jul 2017
Posts: 3,273
Quote:
Originally Posted by aircommuter View Post
While the meter will give information it is still controlled by the module which will shut off the feed for the load being too low or high. The module could also be defective.
I would think if you tested the lights at the trucks 7 way with no load and got good readings then it would work hooked up with some load even leds
MR.M is offline   Reply With Quote
Old 07-07-2022, 06:08 PM   #12
Senior Member
 
Join Date: Nov 2017
Posts: 1,448
Quote:
Originally Posted by MR.M View Post
I would think if you tested the lights at the trucks 7 way with no load and got good readings then it would work hooked up with some load even leds
Those modules have a mind of their own sometimes.
Lots of large wires going to the turn signal switch are a thing of the past and have been for a while. Three or 4 small wires send codes to the module and they do the work, sometimes the module will be controlling relays for the trailer circuits.
aircommuter is offline   Reply With Quote
Reply

Tags
camper, wiring

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Forest River, Inc. or any of its affiliates. This is an independent, unofficial site.



All times are GMT -5. The time now is 11:09 AM.