Trailer brake light not working - FIXED
Moderator, please move this if in the wrong place. I have a 2012 Keystone Sprindale 179QB and I am having a problem with my passenger side brake light not working. I changed bulbs with the driver ...
Forum Discussion
Thanks for all your input on this. It is fixed. Caig DeoxIT is your friend.
I had already found the fuses for the trailer turn circuits, removed them, and tested them for zero ohms. So I figured it was the truck’s wiring. Not something to trace down on 100 degree days so I waited until today. Only 84 when I went to look at it. I was able to disconnect the connector from the truck wiring to the 7-pin jack for the trailer and checked that out. Comparing the response for the left vs right, I found the right was still not working correctly. Using a test light on the pin for the right turn signal, the bulb was only dimly lighting when brake was applied. For the left turn it was bright. That meant it was in the truck somewhere.
Not wanting to trace wires, I decided to recheck the fuses for the 2 lines. I pulled them and used the test light to check power to them. With the brake applied, one side of each fuse socket had the test light shine bright, so voltage was getting to the fuses. I recently got a small kit with Caig’s products recommended by Mexicowanderer and Landyacht so I thought I’d try DeoxIT in the fuses. I had already tried just pulling the fuses and reinserting and wiggling them with no effect. I used a swab to wipe down the fuse contacts and the socket, waited a few minutes and reinserted the fuses. I put in my LED trailer plug tester and the correct lights were lit when applying the brakes. Just to make sure, I hooked up the trailer plug and the lights were finally working correctly. I never thought the fuses might be the source of the bad connection.
Anyway, things are looking good but you can be sure I will be closely watching the lights. And getting a spray can of the DeoxIT. Thanks Mex and LY!
I had already found the fuses for the trailer turn circuits, removed them, and tested them for zero ohms. So I figured it was the truck’s wiring. Not something to trace down on 100 degree days so I waited until today. Only 84 when I went to look at it. I was able to disconnect the connector from the truck wiring to the 7-pin jack for the trailer and checked that out. Comparing the response for the left vs right, I found the right was still not working correctly. Using a test light on the pin for the right turn signal, the bulb was only dimly lighting when brake was applied. For the left turn it was bright. That meant it was in the truck somewhere.
Not wanting to trace wires, I decided to recheck the fuses for the 2 lines. I pulled them and used the test light to check power to them. With the brake applied, one side of each fuse socket had the test light shine bright, so voltage was getting to the fuses. I recently got a small kit with Caig’s products recommended by Mexicowanderer and Landyacht so I thought I’d try DeoxIT in the fuses. I had already tried just pulling the fuses and reinserting and wiggling them with no effect. I used a swab to wipe down the fuse contacts and the socket, waited a few minutes and reinserted the fuses. I put in my LED trailer plug tester and the correct lights were lit when applying the brakes. Just to make sure, I hooked up the trailer plug and the lights were finally working correctly. I never thought the fuses might be the source of the bad connection.
Anyway, things are looking good but you can be sure I will be closely watching the lights. And getting a spray can of the DeoxIT. Thanks Mex and LY!
