7 pin trailer plug issue

[Megadesertdiesel]

i have a problem with my 7 pin plug at the bumper. i have checked all brake and turn bulbs on the truck and the trailer works fine when hooked to two other trucks.



i do not have any drivers side turn signal and brake light. i have running lights all the way around. its a Carson 16' carhauler i just replaced all of the lights and wiring. any ideas? any issues with the plug?



i have taken the plug off the bumper recently and blew out the dirt and cleanned the contacts.

 

[AllianceDiesel]

sounds like you have a problem in your total intergrated power module, or front control module, the new trucks don't have fuses for the lights, sounds like it needs to get into the shop and have them do an tsb for the trailer wiring and if that doesn't work get it fixed under warrenty.

 

[AClayton]

i have a problem with my 7 pin plug at the bumper. i have checked all brake and turn bulbs on the truck and the trailer works fine when hooked to two other trucks.



i do not have any drivers side turn signal and brake light. i have running lights all the way around. its a Carson 16' carhauler i just replaced all of the lights and wiring. any ideas? any issues with the plug?



i have taken the plug off the bumper recently and blew out the dirt and cleanned the contacts.

I wouls suggest using a test-light 1st to see if power is getting to plug. If so, the connection between truck and trailer is compromised. If not... Mopar-tech has your only other solution

 

[AllianceDiesel]

This is so funny, my dad just bought a 06 mega, and when he hooked his boat/trailer up to the truck, only the right turn signal would work on the trailer, so I get my test light out and do some looking, found that the right turn filiment on the trailer had busted and actually contacted the other filament in the bulb, so we thought that was the problem, replaced the bulb and still had problems so knowing what I have gone through on other trucks I starting check the wires at the back of the tipm, sure enough now there is no power going to the left turn signal but now have power going to the right. So called the dealership and tell them that the truck needs the flash done and the service manager says, "you will just have to come by and see if we can get it in" my response was "its just a flash, I have done many of them and it only takes a few minutes" well I don't think that impressed him so we will see what happens monday. Hopefully the flash will take care of it.

 

[Megadesertdiesel]

i have checked all fuses and no bad ones. now what voltage should i be seeing when the truck flashes? check voltage at plug correct?

 

[bnbrown]

you should see 12v (+/- 2) at the plug, if it is the turn signal/flasher it will pulse... so if it is a digital meter might vary quite a bit, analog will bounce pretty good, might be easiest to just use a test light...
I just built myself a test plug, a spare plug wired out to lights (labeled of course).

 

[Simplysmn]

the newer trucks have a fuse for stop light's , and then turn lights in the under hood junction box that way it saves the whole system .

 

[AllianceDiesel]

the stop lights have a fuse, but the turn signal have what they call a high side drivers whcih detect a ground and then don't supply power to the circuit.

 

[DMcGalliard]

Pin Issues

#@$%!I have issues with my 05 and the fifth wheel pigtail, I think it is the truck connection, it caused the brakes to not work all the time and sometimes I get a short on my Brakesmart. I measured the amount of connection depth and it did not seem that it full engaged. Looking for connectors that engage better.



I did make a tempory fix that is working, Insert the pigtail hard into the truck, clamp the holder around the pigtail with a hose clamp, tight. This works and I get the right reading from my Brakesmart. I know it takes a minute or to disconnect and connect, but is worth to make sure you have brakes. You might try this.



Dave Mc

 

[AllianceDiesel]

well, drove 60 miles to get to the dealer, get the flash done, I specifically ask did they test to make sure there was power to all the plugs and the service manager said it was tested, drive home and check it with my test light, no power to the left turn signal, so now I am ****** gonna have to call the dealer tomorrow and figure out whats gonna happen, told dad that is was fixed and everything is good, but don't have the balls to tell him that it isn't working, because I don't want him to regret buying the truck, I think I might wire it so the trailer wiring works off the truck wiring and bypassing the computer and see what happens, probably put some 15 amp fuses between the truck and trailer to protect everything. And Im gonna rewire the whole trailer to make sure that it doesn't have any more problems (don't know if the computer was tripped before dad bought the truck or not so we will see)

 

[Megadesertdiesel]

UPDATE********





finally took my truck to the ******* and they replaced the Power distribution center PDC/ totally intergrated power module TIPM module (B). from their paperwork the module was $653 plus install, all warranty in my case but how long will this one last?

 

[seafish]

UPDATE********





finally took my truck to the ******* and they replaced the Power distribution center PDC/ totally intergrated power module TIPM module (B). from their paperwork the module was $653 plus install, all warranty in my case but how long will this one last?

I am pretty sure there is a thread on here somewhere that describes putting in inline fuses downstream of the TIPM which then protect the TIPM from overdraw conditions.

 

[AllianceDiesel]

well I have to give an update too, took it to the dealer last week tell them that the tipm would need replaced like I told them before, sit there for about 30 min. they come out and say well the tipm needs replaced and they are on national back order, nice, I am freaking ****** I told them two weeks before that they should just order a tipm because I knew what the hell was wrong, luckely dad is pretty calm about it.



We are gonna re-wire his boat trailer just incase its the boat (he just bought the truck 2 months ago so we don't know if the tipm was bad when he bought it) we are gonna put inline fuses on all the power wires so that if there is a ground we can stop it before the computer see it, hopefully that will fix the problem.

 

[HBarlow]

Over a year ago when I was transporting I was dispatched to a company in Oxnard, CA to pick up a heavy construction silo storage trailer with my then Ram, an '06.



I hooked up and the trailer lights didn't work so I went inside and told the shop foreman at the company that owned the trailer. They sent an airhead doper kid with red, blue, green and yellow died hair out to "fix it. " I stood around talking with the man who owned the company I worked for who was also picking up a trailer. Suddenly smoke rolled out of the seven pin female on the back of my truck and the doper kid looked panicked and did nothing. I arn over and jerked his seven pin male out of the connector.



Short version of the story: The airhead doper destroyed an isolator module at the rear frame of my truck and couldn't repair it so part of my turn signals didn't work. A trailer company in Elkhart, IN who specialized in supporting transporter trucks repaired the problem by installing a brand name but aftermarket isolator module. It cost only a fraction of what a Dodge dealer wanted.

 

[AllianceDiesel]

where is this module, the tipm is what everybody is having problems with and that is the fuse box assembly.

 

[HBarlow]

Mopartech,



If you're asking me it was hanging on the driver's side rear frame rail. I never saw the original OEM version because I was stuck in the customer waiting area.

 

[AllianceDiesel]

i don't know of anything that would be along the rail, there is only one module that is on the trailer wiring circuit and thats the tipm up in the engine bay.

 

[HBarlow]

They tech who did the work may have told me what he wanted me to hear. There was snow on the ground in IN, I had a trailer hooked up to deliver to the west coast, and one side of my tail/stop lights weren't working.



Maybe the tech hung an aftermarket isolator module on the truck to compensate for the fact that the TIPM had a burned out circuit or two. He told me he replaced a factory module with an aftermarket.



I'll never know because I didn't troubleshoot the problem myself, wasn't able to observe him doing it, and I sold the truck three months ago.



The price I was charged was reasonable, less than $100 as I remember, and he restored the lights so I have no complaint.