I tried to hook up my 4 pin trailer to my 7 pin connectrer with an adapter I bought. now I have no brake lights. I have signals and markers. I tried to replace all of the fuses in the power center for the brake lamps and the trailer relay, still nothing. I have power for the blinkers and markers at the bulb sockets and in the power block. I have no power on any of the connector wire pins for the brake switch. I replaced the brake switch. I tried to test the plug both out of the brake relay and in, still nothing? I have tried everything i can think of? what am I missing?
Have you checked the fuse
SOURCE: 2001 dodge ram 1500 brake lights
I would guess the brake fuse ( this does not use the same fuse as the tail lights/blinkers) or the ground for the brake light bulb.
SOURCE: 2001 dodge neon tail lights inop
looking at your schematics and , you say tail lights don't work , you didn't mention if front parking lights and license plate lights are working , they all come from the same source , a black /yellow wire , a good clue if front work and rear don't , please advise .if fronts work then you have a open circuit somewhere between junction S118 (near breakout for left headlamp) and rear sockets.
SOURCE: 02 RAM 2500 no power at trailer plug
It should have a fuse for the marker lights. Do they work on the truck. Brown is the color for the marker lights. Good Luck
SOURCE: factory 99 dodge trailer plug wiring
You'll need to disconnect the wires from either the truck connector or the trailer connector...
I highly suggest purchasing a voltage checker- it looks like a screwdriver with a pigtail of wire with an alligator clip on the end. The tip of the 'screwdriver' has a point for probing. The light in the probe will light up...makes it easy to trouble shoot without a helper behind the trailer.
Hook the aligator clip to a good positive grounding point on the bumper or frame(not painted).
then pin by pin on the truck connection, stick the probe on each terminal tab.. and write a simple diagram where you find brake, tail, backup, etc...
Then i'd suggest, taking the connector off of your trailer, exposing the wire ends.
Run again thru your diagram and turn on each light of the truck. As you do, touch the wires from the trailer to that specific terminal. (make sure your ground wire is attached on the trailer) you can mark each wire with a piece of tape and label it which is which.
then simply attach your trailer wires according to your diagram to the terminals in the connector... that should get you in business..
hope that makes sense...
That way if the factory wiring harness remains the same, you'll be able to use it with other trailers if the need arises..
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
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have you checked your computer for blown capacitors..they will smell or be swollen at the tops and bulging..they should be flat and not have any electrical odor..odds are you may have had the key on in the run position when you inserted the adapter and created a dead short to a relay or worse case the computer..check your main relays under the hood 1st.
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