Looking for color code (diagram) - 7 wire trailer harness/wiring
Want to install 7 point trailer connector in box of truck for towing fifth wheel trailer as opposed to plugging into 7 point bumper connector. would like to know correct color code for each wire before proceeding with installation. any other advice or tips welcomed. Thanks!
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Your wire colors are roughly the same as for a standard 4 wire trailer. Dark green is right turn, yellow is left turn. You have brown with white stripe for park lamps--connect this to the brown trailer wire. The white or black trailer wire connects to the car body or frame. Ok?
the simplest way to do this is to go to a tow bar installer shop and buy the harness ( around $25.00 aud)
it is a simple action of pulling a harness plug apart and inserting a piggy back plug in the connection
the wires for the trailer are properly installed and all you have to do is wire the plug connection according to the wiring diagram that came with the plug
The connectors for towing wire harnesses on foresters are generally on the passenger side, below the rear taillight inside the cargo space. some require pulling up the foam block that is between the spare tire compartment and the taillight. Check where you replace the tailights from inside the car, if there isn't a matching connector hanging out there, check around the spare tire compartment, see if you can remove the carpeted foam block next to the compartment and find the plug under there.
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..
Go to an auto parts store and see if you can have a look at some electric brake modulators and trailer connectors they almost always have instructions in them that detail standard colors for any install. The standard diagram is often right on the back of the connector package.
I believe you can look up the manufacturer of the trailer plug kit and find the wiring diagram there. On alot of the trailer plug kits, they have pics and diagrams in the package. The 7 pin plug (truck side) is available with the pig tail set up that plugs directly into the wiring harness for the lights. Then all you would have to worry about is the 2 wires for the electric brakes.