If your bolts are getting loose, I recommend using Loctite Threadlocker 262 - High Strength - Up to 3/4" Nuts/Bolts - 0.20-Fl-Oz Tube # LT37420 and torquing your bolts to the manufacturer specs. The Loctite will keep the bolts from coming loose and prevent further wear because of loose hardware.
If you need to replace the unit you currently have due to the oblong holes, I recommend the Fulton Fold-Away Coupler Hinge Kit for 3" x 3" Tongue - Bolt On - Up to 5,000 lbs # FHDPB330301. Unfortunately... view full answer...
It sounds like you are on the right track with the ground problem.
Check your trailer connector on the Grand Cherokee, and make sure the white wire is grounded to the frame of the vehicle.
Even though your trailer works fine when connected to your truck, you still might have a weak ground on the trailer. It is not unheard of that a given trailer will work fine with one vehicle, but not with another.
Check the grounding point where the white wire from the connector attaches to the trailer... view full answer...
Everything works okay until you activate the running lights and draw maximum amperage through the system. This is the classic symptom of an insufficient ground connection.
Find the main grounding point on the trailer by tracing the white wire from the trailer connector. This wire will usually ground to the trailer tongue. Make sure this connection is tight and that the connection is not corroded. Then check the ground connection for each of the trailer lights. Trailer lamps can ground... view full answer...
I cannot speak for all fold-away coupler hinge kits but the ones we offer, the Fulton Fold-Away Coupler Hinge Kit part # FHDPB230101, part # FHDPB330301, and part # FHDPB350101 do not contain any bushings. It can be rather difficult to just look at a bolt or hinge pin and determine whether or not it has stretched or deformed but I would be willing to bet that is the issue you are having. The loose connection between these bolts and pins is a rather serious safety issue so I highly recommend... view full answer...
Okay, so there's a few things you can do to troubleshoot why your running lights are not working after installing your new lights, and while a ground is likely the issue, let's just go ahead and be thorough here. While the dealer may have said the wiring on the truck wasn't the issue, you didn't mention fuses, so start with that; take a look at your owner's manual to locate any trailer fuses or relays and ensure they are all there and in working order.
If so, you'll need a circuit tester... view full answer...
What you're describing is the classic symptom of a poor ground connection somewhere in the trailer wiring on the vehicle or on the trailer. Everything works fine until you draw maximum amperage through the system by turning on the running lights. Check the ground connection on the vehicle where the trailer connector attaches to the vehicle frame or chassis. Make sure this connection is tight and not corroded.
Trace the white wire from the trailer connector back onto the trailer tongue,... view full answer...
Things seem to work okay until you apply the vehicle brakes, is that correct? If so, it sounds like a poor ground connection. Make sure the white wire from your trailer connector grounds to the trailer frame (usually on the trailer tongue). Make sure this connection is secure and not corroded. Check the ground for each trailer lamp, as well. Each lamp should ground either through its mounting studs being in direct contact with the trailer frame, or by its own ground wire connected to the... view full answer...
Sounds like you are trying to figure out why the left brake light on your trailer isn't functioning but the rest of the trailer lighting seems to be working. Typically this problem is due to a bad ground on the light assembly.
The light grounds should be attached to clean and corrosion free bare metal surfaces. If there is anything between a light ground and the metal trailer frame or if the trailer has an aluminum frame, tilt bed, or folding tongue, any of these things can interrupt... view full answer...
What you describe still sounds like it might be a ground problem.
I'd make sure the adapter you used on the vehicle is securely grounded to the vehicle with good attachment to clean metal. Check the main ground on the trailer tongue, which is where the main ground from the trailer connector should attach, make sure this connection is also secure and not corroded. I like to install a star washer on my ground connections between the ring terminal and the trailer frame to get a good bite... view full answer...
Sounds like the ground of your trailer is too weak to illuminate both trailer taillights at the same time and that is why the turn signals work but the brake lights do not.
Make sure that the trailer side connector are clean and free of corrosion inside and out. The main connector grounds should be attached to clean and corrosion free bare metal surfaces. The light grounds should also be attached to clean and corrosion free bare metal surfaces. If there is anything between a light ground... view full answer...
There are a couple of things that you can check to see what the problem is with your trailer light. Since you mentioned that power is getting to the light it could be that the circuit is not being completed meaning a bad or weak ground connection.
Light # ST40RB grounds through its mounting hardware. The attachment point must be clean and corrosion free. If there is anything between a light ground and the metal trailer frame or if the trailer has an aluminum frame, tilt bed, or folding... view full answer...
It sounds like there is either a lot of corrosion on either the vehicle's trailer connector or the connector on the trailer. Or, your trailer has a ground problem.
First thing you should try is thoroughly cleaning the pins of the connectors with fine grit sandpaper to get the pins down to bare metal.
The main connector grounds should be attached to clean and corrosion free bare metal surfaces. The light grounds should also be attached to clean and corrosion free bare metal surfaces.... view full answer...
Dim trailer lights can be a symptom of a bad ground or wiring harness connection. Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside and out. The main connector grounds should be attached to clean and corrosion free bare metal surfaces.
The light grounds should also be attached to clean and corrosion free bare metal surfaces. If there is anything between a light ground and the metal trailer frame or if the trailer has an aluminum frame, tilt... view full answer...
This is likely a ground issue. Ground problems normally show up when there is more draw on a system such as when you have the running lights on and then use another function like a turn signal or brake light.
Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside and out. The main connector grounds should be attached to clean and corrosion free bare metal surfaces.
The light grounds should also be attached to clean and corrosion free bare metal... view full answer...
The turn signal and brake lights are on the same circuit. If one is not working then it is likely because there is a bad or weak ground connection that will need to be addressed. Make sure that the vehicle and trailer side connectors are clean and free of corrosion inside and out.
Next make sure the main trailer connector ground and the grounds for all of the lights are attached to clean and corrosion free bare metal surfaces.
If the trailer has an aluminum frame, tilt bed, or folding... view full answer...
This sounds like a ground problem. Ground problems normally show up when there is more draw on a system such as when you have the running lights on and then use another function like a turn signal or brake light.
Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside and out. The main connector grounds should be attached to clean and corrosion free bare metal surfaces.
The light grounds should also be attached to clean and corrosion free bare... view full answer...
This sounds like a potential ground issue. Weird things can happen when there is a ground problem.
Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside and out. A short from one of the turn signal/brake light circuits to the other could cause this issue. The main connector grounds should be attached to clean and corrosion free bare metal surfaces.
The light grounds should also be attached to clean and corrosion free bare metal surfaces. If... view full answer...
This sounds like a bad ground either on the wiring harness # 118412, on the trailer or both. First try moving the ground from the wiring harness. Make sure it is attached to a clean and corrosion free bare metal surface. Also make sure that the main trailer side connector is grounded to a clean and corrosion free bare metal surface. Do the same for each of the lights on the trailer. Make sure the trailers connector is corrosion free.
If the trailer has an aluminum frame, a tilt bed, or... view full answer...
If you are turning on your vehicle headlights and the lights on your trailer are not working, and you did this with your other vehicles the issue is on the trailer and is almost certainly the ground. I know you said you cleaned it already but you also want to double check to ensure the ground wire is attached securely to the trailer frame via ring connector. If your trailer has a folding tongue, put the ground connection on the main body of the trailer frame and not the tongue; it should... view full answer...
Sounds like the problem is actually on the trailer side of the equation. Most likely the grounds on the driver side of the trailer wiring are insufficient and causing the lights to illuminate dimly.
Make sure that the trailer side connector are clean and free of corrosion inside and out. The main connector grounds should be attached to clean and corrosion free bare metal surfaces. The light grounds should also be attached to clean and corrosion free bare metal surfaces. If there is anything... view full answer...
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