"Check trailer wiring" DING DING DING

[Bikemobile]

I bought an old, 1991 Jayco 1006 popup trailer the other night, drove it home 70 miles in the dark. All the lights worked miraculously. It has a metal round 6 way trailer lights plug. I used an adapter to the large plug on my Sierra. As i started driving home, I would get a DING DING DING "trailer attached", "check trailer wiring" all the way home, every 30 seconds or so.

 

Very annoying. It didnt tell me I had a trailer attached or to check the wiring for the last 20 miles or so. The wierd thing is, the trailer lights didnt flicker like there was a bad connection or anything. The trailer does have a place for an onboard car battery. No battery there.

 

I am trying to decide if I need to convert the trailer to the large round plug to prevent the DINGs all the way to the campsite.

 

Any ideas? I have towed my small 5x8 utility, a large 8x12 utility and a horse trailer with no issues or messages.

[Bikemobile]

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[Bikemobile]

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[Waaazooo]

Mine did that when I had a short (animal chewed through the shielding). Doubly check your wiring

 

 

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[bdbake01]

Yeah it's wiring. It's just blinking so fast you're not noticing it.

[Hewshal Thornton]

So is the 30 amp cord the problem, or something in the 7 way. Are all the lights blinking super fast.

[midwestdenaliguy]

The trailer brake control module mounted under the bed (by the spare tire) gave me DIC messages. I can't recall if it was a wiring message though, I think it said 'service trailer brake system'. When I replaced it I noticed the pins were corroded, so I put bulb grease on the pins of the new one (dumb location as it gets covered with dirt and water). It didn't effect trailer lighting either. But it doesn't sound like this is the issue for you, figured I'd mention it though in case you run out of troubleshooting options. Part # for the module is 23337305. Good luck figuring it out.

Edited August 12, 2022 by midwestdenaliguy