The ground wire is the first thing I would check.
Use a test light to check the power lead at the plug and work your way back to the source
SOURCE: No trailer right turn signal or brake light
Hey Boon,
The pinouts for a 7-way plug are as follows:
Seven wire Trailer plugs:
Horse, stock or utility trailers:
White = Ground - 1
Blue = Electric Brakes - 2
Brown = Tail and clearance lights - 3
Black = Battery, aux power - 4
Yellow = Left turn/Brake - 5
Green = Right turn Brake - 6
Orange or Purple (not both) = Auxilliary or Reverse - 7
Recreational Vehicle:
White = Ground - 1
Blue = Electric Brakes - 2
Green = Tail and clearance lights - 3
Black = Battery, aux power - 4
Red = Left turn/Brake - 5
Brown = Right turn Brake - 6
Yellow = Auxilliary or Reverse - 7
In both cases 4 is battery and 7 is reverse, aux or not used.
Double check your wiring using these lists as a reference.
Click here for my post on Trailer wiring
This should get us closer to the answer.
Best regards,
Mike
SOURCE: tow plug
you have one of two things going on first check to see if the brake light on the left side is shorted out, it will be a 1157 bulb replace it and see if it works looking good does not mean it's good if it has a single contact then it's a 1156 bulb, check to make sure where the bulb socket is that the rubber inside the socket is not worn out and the bulb is shorting to ground. if it is buy a 1157 pig tail repair kit at any Nappa auto truck store or any trailer store. replace it if it needs it. Next if that does not fix it pull the left wheel off pull the drum off and look at the wires on the inside, if they are bare inside it's shorting out if you don't see a bare wire look at the color of the two wires and with a ohm meter and one wire disconnected from that side touch them at the plug and to ground one at a time you should have one wire going to ground one not if both wires going to the left side show they are shorted then you need to replace the wire or the electric coil. if you need more help just ask. If I can e-mail you I can send you a diagram and show you how to test if yo don't know. good luck.
SOURCE: 2001 Dodge Ram 2500, no running lights on trailer
The truck is protecting itself from the load impose by the trailer.. Chk the plug on the truck for wire gauge size. Turn any electrical loads off on the trailer, any and all. If fuse still blows then the fuse is either underated or the trailer has a dead short. In fact turn trail main power panel of. All lights work you say. So ck the inverter for defect byturning off the inverter on one of the trailers.
SOURCE: I have a 2008 Dodge Ram that came with the tow
If you have amber signal lights & red brake lights, it's 2 separate circuits. You'll need to buy a small converter that you wire into harness to correct that. Not expensive, try autoparts store or RV/trailer sales, should have them.
SOURCE: No left turn signal or brake light on trailer
I had the same problem on 06 ram, the problem is one of the controll modules under the fuse panel under the hood on the drivers side. My trailer mechanic told me this was a common problem and dodge will only charge about 700 dollars to replace it. he solved my problem by installing a converter on the wires to the tail lights of the truck then running down to the trailer plug. it was most likely caused by a short in the trailer and dodge in their infinate wisdom failed to put a fuse between the trailer and control module. and by the way even though this is a manufacturing defect they will not warranty the module. hope this helps.
Brakes - 2,
aux power - A
Brakes - 2,
aux power - A33 views
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