What you're experiencing is a textbook gound issue. The ground connection isn't strong enough to handle the power draw from the brake and turn signals with the running lights on but it's strong enough to handle them with the running lights off.
Improve the gound location on both the trailer and vehicle. Both should be grounded to a clean, bare metal, steel surface. view full answer...
It sounds like you have one of two problems. First, I would check the wiring harness at the back of the vehicle. Disconnect the trailer and make sure the ground wire is connected to a clean, rust, paint and corrosion free ground location. Then using a circuit tester, item # PTW2993 if needed, test the wires going into the converter.
The red wire should have the brake signal on it, the green wire should have the right turn signal on it, the yellow wire should have the left turn signal on... view full answer...
It sounds as if the ground connection is not keeping continuity through the removable portion of the trailer tongue. Try running a jumper wire from the fixed portion to the removable portion of the tongue. If this fixes the issue, you have confirmed that the point where the tongue comes apart is not providing enough continuity for the ground circuit. view full answer...
I'd start by going into the fuse block in the engine compartment. The fuses that protect the left trailer tow stop/turn signal circuits is located in location number 19 in that fuse box. Examine the fuse and replace if needed, but BEFORE plugging the trailer back in, you'll want to closely examine the wiring carrying the left side stop/turn/taillights on the trailer to find the short circuit that caused the fuse to blow in the first place. If you plug in the trailer without locating and... view full answer...
If the trailer brake magnet is energizing with the turn signal then the turn signal wire is either connected to brake magnet power wire or there is a short between the turn signal wire and the brake output wire on the 7-Way. First, lets make sure that you have the 7-Ways on the vehicle and on the trailer wired up correctly.
Take a look at the picture I have included. Ignore the colors and look at the functions then compare the diagram to how your 7-Ways are set up. It looks like you have... view full answer...
Since the lights on the trailer work on a different tow vehicle, we can eliminate the trailer as the problem and focus on the wiring harness and the 2008 Jeep Commander. The running light wire on the harness is the brown wire. It is on the same side as the yellow wire which should be on the driver side of the vehicle.
You can test the wiring harness using a circuit tester like # PTW2993. Do this test without the trailer connected. Turn on the running lights on the vehicle and use the circuit... view full answer...
In order to troubleshoot your braking issues with the Curt Echo # C51180, first start by adjusting the output settings on your controller. Curt recommends testing the controller output by driving forward on a dry and level paved or concrete surface. At approximately 25 mph, apply the vehicle's brakes. If the trailer brakes lock up, decrease the max output. Repeat this process until stops are firm, just short of lock up. Then repeat the same process for setting the sensitivity until you... view full answer...
This could definitely be a ground problem. Without a proper ground, the circuit cannot be completed which can cause light failure and/or malfunction. You will also want to make sure you are using the correct wiring harness. For a 2006 Jeep Commander with no factory package, you will need to use Tow Ready Custom Fit Vehicle Wiring, # 118408, instructions linked below. With a tow package, you would use Tow Ready Custom Fit Vehicle Wiring, # 118381. I have included a link to the installation... view full answer...
Thanks for sending a diagram!
The fuse panels on your 2007 Jeep Commander are located under the hood and on the lower instrument panel just to the left of the steering column.
I did some research on your Jeep and fuse location number 21 (rear turn/taillights) in the front underhood fuse box is a 20 amp yellow mini fuse. Replace if blown. I would still take a look at your owners manual to confirm and I think it's page 399.
I would also check your 10-pin connector for any corrosion and... view full answer...
Since you trailer's right side turn and tail lights are dim, but still operate somewhat, the most likely cause is a bad ground at the light unit itself. If the main trailer ground were at fault this would affect both sides of the trailer so odds are that the issue is at the light assembly.
If the light uses a mounting stud for its ground remove the fixture and sand/clean the area to remove any paint, primer or grease that may be interfering with the ground connection. If the light uses... view full answer...
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