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Open Roads Forum  >  Fifth-Wheels

 > Brake Controller failure

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LadyRVer

Florida

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Posted: 05/05/20 07:36pm Link  |  Quote  |  Print  |  Notify Moderator

I had an intermittent problem with my brake controller showing the now brakes when rolling down the road. Turned out to be the plug on the trailer end.

7.3 psdman

Northern Illinois

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Posted: 05/06/20 01:38pm Link  |  Quote  |  Print  |  Notify Moderator

With this being an intermittent problem I was wondering if I buy one of those 7 blade testers can I leave it plugged in until I see that the numbers drop out on my controller and then go back and read what the tester diagnoses? That is what I have in mind right now.

7.3 psdman

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Posted: 05/12/20 05:59pm Link  |  Quote  |  Print  |  Notify Moderator

I was disappointed that the tow vehicle circuit tester doesn't mimic having the trailer hooked up. The tester showed that there was no power to the backup lights. Everything else works according to the tester and the I double checked with the meter and no power to the center post. The truck itself has backup lights. I checked the fuses and relays under the hood and they all work. I am thinking about buying a tow harness for the truck. But I think I will take the old one off and look at it first to see if a wire came loose.

enblethen

Moses Lake, WA

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Posted: 05/12/20 08:42pm Link  |  Quote  |  Print  |  Notify Moderator

Some trucks have a harness that plugs into the back of the seven pin. The ears come loose that holds it in tight.
Is there another trailer you can plug it into to test the receptacle?


Bud
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7.3 psdman

Northern Illinois

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Posted: 05/18/20 03:05pm Link  |  Quote  |  Print  |  Notify Moderator

I replaced the pigtail wiring harness on the front of the trailer. I had read the reviews and knew that the Chinese use a different color code for their wiring. I plugged the wiring harness into the truck connection and then used a couple of small jumper wires and figured out the color pattern from the pigtail wires. NO PROBLEM. I think the Chinese wired my trailer too.
I installed a new towing harness on the truck and a new brake controller too.
The whole job cost a little under $140. Not bad when you figure the number of years that I have been towing the fifth wheel around.

laknox

Arizona

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Posted: 05/19/20 11:30am Link  |  Quote  |  Print  |  Notify Moderator

7.3 psdman wrote:

I replaced the pigtail wiring harness on the front of the trailer. I had read the reviews and knew that the Chinese use a different color code for their wiring. I plugged the wiring harness into the truck connection and then used a couple of small jumper wires and figured out the color pattern from the pigtail wires. NO PROBLEM. I think the Chinese wired my trailer too.
I installed a new towing harness on the truck and a new brake controller too.
The whole job cost a little under $140. Not bad when you figure the number of years that I have been towing the fifth wheel around.


Cr@p. The Chinese probably would have done a better job, though the wiring itself may have been suspect. Lots of incentive to do a good job when the alternative is likely a beating, at minimum.

Lyle


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