newer ford and sensing trailer hooked up

I have this problem with my 5th wheel on a chev. I use Dielectric grease and the problem goes away. If it comes back, I clean things up, add more Dielectric Grease and it goes away again.

Works for me.

StirCrazy wrote:

BB_TX wrote:
I would start by cleaning the contacts on the trailer cord connector and truck receptacle. Do you have both a bumper connector and an in-bed connector? If so, try the other one (which ever you do not normally use).

ya I have both as I still use the bumper one for my camper and the in bed one for my 5th. I'll do that and see if it makes a difference

I sometimes, but not always, had a connection issue with my in-bed connector but not my bumper connector. Ended up replacing the in-bed connector.

StirCrazy wrote:

JBarca wrote:

BB_TX wrote:
I would start by cleaning the contacts on the trailer cord connector and truck receptacle. Do you have both a bumper connector and an in-bed connector? If so, try the other one (which ever you do not normally use).

X2 on this above BB_TX.

I have had the same issue; the DOT lights work, but I lose the brake wire connection, and the controller shows the trailer disconnected. The issue on mine was with the trailer plug, and it depended on which trailer I plugged in. On some trailers, the plug fit into the Ford truck receptacle was not tight, and it seemed the brake wire lost the connection, mainly in turn. Or that I never saw the lights flicker as the controller used the brake wiring as the system to detect trailer was connected or not.

And then, on some trailers, dirt was jammed in the cord plug, holding the contacts apart on a friend's trailer I was repairing for him using my truck to tow it.

If you have the DOT lights but lose the brake, it points most times to the plug and receptacle connection.

I have found that using a velcro wrap over the receptacle cover and the trailer plug to hold them tight helps them wiggle loose in a turn situation.

Let us know what you find out. I'm sure there are more ways to have the problem happen. You need to keep those good tips for a day when you might need that info.

John

I'll look into that. I wonder if a bit of dielectric grease would help for trouble shooting.

Steve

Dielectric grease is good stuff, but where do you want to use it? It helps prevent corrosion but is also an insulator; electricity will not pass through it. If you are considering cleaning the 7-wire plug, try CRC contact cleaner/electrical cleaner. It cleans and only leaves a slight film to help with corrosion.

I learned the hard way using dielectric grease on ignition system control wiring, and never again.

BB_TX wrote:
I would start by cleaning the contacts on the trailer cord connector and truck receptacle. Do you have both a bumper connector and an in-bed connector? If so, try the other one (which ever you do not normally use).

ya I have both as I still use the bumper one for my camper and the in bed one for my 5th. I'll do that and see if it makes a difference

JBarca wrote:

BB_TX wrote:
I would start by cleaning the contacts on the trailer cord connector and truck receptacle. Do you have both a bumper connector and an in-bed connector? If so, try the other one (which ever you do not normally use).

X2 on this above BB_TX.

I have had the same issue; the DOT lights work, but I lose the brake wire connection, and the controller shows the trailer disconnected. The issue on mine was with the trailer plug, and it depended on which trailer I plugged in. On some trailers, the plug fit into the Ford truck receptacle was not tight, and it seemed the brake wire lost the connection, mainly in turn. Or that I never saw the lights flicker as the controller used the brake wiring as the system to detect trailer was connected or not.

And then, on some trailers, dirt was jammed in the cord plug, holding the contacts apart on a friend's trailer I was repairing for him using my truck to tow it.

If you have the DOT lights but lose the brake, it points most times to the plug and receptacle connection.

I have found that using a velcro wrap over the receptacle cover and the trailer plug to hold them tight helps them wiggle loose in a turn situation.

Let us know what you find out. I'm sure there are more ways to have the problem happen. You need to keep those good tips for a day when you might need that info.

John

I'll look into that. I wonder if a bit of dielectric grease would help for trouble shooting.

Steve

We had this same problem and did all the above including replacing the pigtail, and having the dealership check the connection (without the FW hookup up). We ended up taking the FW to get the brakes checked. One side was completely disconnected, wires worn through and magnets floating free. Turned out the truck sensor was right!

BB_TX wrote:
I would start by cleaning the contacts on the trailer cord connector and truck receptacle. Do you have both a bumper connector and an in-bed connector? If so, try the other one (which ever you do not normally use).

X2 on this above BB_TX.

I have had the same issue; the DOT lights work, but I lose the brake wire connection, and the controller shows the trailer disconnected. The issue on mine was with the trailer plug, and it depended on which trailer I plugged in. On some trailers, the plug fit into the Ford truck receptacle was not tight, and it seemed the brake wire lost the connection, mainly in turn. Or that I never saw the lights flicker as the controller used the brake wiring as the system to detect trailer was connected or not.

And then, on some trailers, dirt was jammed in the cord plug, holding the contacts apart on a friend's trailer I was repairing for him using my truck to tow it.

If you have the DOT lights but lose the brake, it points most times to the plug and receptacle connection.

I have found that using a velcro wrap over the receptacle cover and the trailer plug to hold them tight helps them wiggle loose in a turn situation.

Let us know what you find out. I'm sure there are more ways to have the problem happen. You need to keep those good tips for a day when you might need that info.

John

I would start by cleaning the contacts on the trailer cord connector and truck receptacle. Do you have both a bumper connector and an in-bed connector? If so, try the other one (which ever you do not normally use).