Re: [tabtrailers] Re: Electrical Problem

4:51 PM |

Heather, Nada and I just got back home from our big Glacier+ trip a few hours ago, but hope to be addressing this problem a little later tonight. We have found a number of issues regarding miswiring when the 4-pin adapter is rewired (or wired in parallel with the 7-pin adapter. One is simply getting the appropriate wires mixed up. Another is the failure to add a larger ground lead to the 7-pin, since the 4-pin ground is usually too small to handle the extra return current from the battery charge lead.

If someone wishes to check the wiring from the tow vehicle, contact Mary Whitmore and she will mail a little test meter I cooked up to check the 7-pin tow vehicle wiring. Look back to find the message from her and contact her off-forum by using the "Send email" option beside her message. It will go to the first requester, on condition that person will forward it to the next person asking, and send me a tracking email.

As David Bertschinger pointed out, the external lights on the trailer are entirely separate--or are supposed to be (with the exception of the ground lead) from all the other tow vehicle wiring, and the battery charge lead.

More, later

Jerry J

----- Original Message -----

From: hfrystak

To: tabtrailers@yahoogroups.com

Sent: Tuesday, August 31, 2010 11:36 PM

Subject: [tabtrailers] Re: Electrical Problem

Has this situation been resolved? Just asking because my sister is going to borrow my trailer. We hitched it up tonight and had an "oh crap" during the light check - everything was fine with blinkers and side lights, but *everything* turned off when they hit the brakes. We were testing with the headlights of the TV (a Dodge Dakota w/ an aftermarket plug-it-in tow wiring that has a 7 pin & 4 pin hook up). Needless to say, she left without the trailer & I haven't hooked the trailer up to my truck to see if it's doing the same with my big dodge.

Heather

--- In tabtrailers@yahoogroups.com, drb777@... wrote:
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> mariolw3, I would suggest you check the junction box under the trailer, at the other end of the trailer's 7-round cord/plug. After removing a small plastic shroud, open-up the metal junction box and inspect the (in my case vary sloppy) wire-nut connections. It's possible that any of the 3 wires directed to the rear, R & L turn and tail wires, is grounding-out and causing the fuse to trip. Which fuse is it? Actually, the fuses inside the trailer don't directly control the outside trailer lights. Let us know what you find out. Good luck, David-OKC-TABalloy #905
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> -----Original Message-----
> From: mariolw3 <mariolw3@...>
> To: tabtrailers@yahoogroups.com
> Sent: Sat, Aug 28, 2010 12:38 pm
> Subject: [tabtrailers] Electrical Problem
>
>
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> This problem may have been listed before, but I checked the database and files without finding an answer to it.
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> When we hooked up our T@B #056 to our tow vehicle, a Dodge Dakota and go through the electrical check of brakes and lights we found a problem.
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> When the brakes on the truck are applied the brake lights on the T@B do not come on. And also a fused in the trailer then is tripped.
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> We have used sandpaper on the connection plug for any corrosion, but are wondering what the solution might be?
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> Has anyone had this problem?
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> Happy Trails.
> mariolw3 #056
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