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Check that the wiring between the truck and the trailer are connected. Unplug them and then plug them in again. Also check the fuses under the dashboard (if it is a moving truck, there are also fuses under the hood) to be sure they are ok. Finally, check the bulbs in the lights.
What else can I help you with?
What fuse controls the exterior lights on a trailer on a E350?
By "exterior" lights I am forced to assume that your mean the tail lights, brake lights, license plate lights, and if available, the side marker and clearance lamps. When a trailer light wiring harness is attached to a towing vehicle's electrical system, it is generally tied into the tail/brake/license light wiring harness. If that is the case with your setup, then the same fuses that serve the vehicles light system[s] also serves the towed vehicles lights. Usually, one fuse serves the brake lights, and another serves the tail, license, side marker, and clearance lights.
Why do your brake lights work and reverse lights work but your tail lights and license plate light do not on your 1995 suburban1500?
Check under the rear bumper where the trailer light harness is wired in and check for any corroded, worn or disconnected wires. That is always the first place to look for rear light problems on these vehicles.
Why would a 1999 Saturn have no tail lights and dash lights?
If you installed a trailer light set up you should go back and verify the connection or remove it to see it the problem goes away. I have had the same problem with other vehicles and yes the dash light are tied in with the tail lights.
When you plug your boat trailer light to your 2006 GMC sierra the lights on the trailer will not come on if you use another truck the lights will work where do you look is it a fuse or a circuit break?
Trailer Lights Work on Other Vehicles but Not MineIF the lights [tail, turn, and brake] are working on your vehicle, AND the trailer lights will work on some other vehicle, that confirms:That the problem is NOT in your vehicle's wiring system.That the problem is either in the trailer wiring, OR is caused by the IMPROPER connection of the connector plug wires to the wiring of your vehicle.It is critical that the connector plugs [on the vehicle and the trailer] are properly connected to the correct wires.The fact that NONE of the lights work when connected to your truck suggests that the defect is related to the GROUND wireas that is the only wire common to all the different light circuits.
How do you install 1998 Honda CR-V trailer light wiring?
how do I install a trailer lights to a Honda 1998
Why is the fuse to your trailer tail lights blowing when you step on the brake pedal?
short circuit on trailer light wiring
Why don't the clearance lights on the trailer work when connected to the trailer harness all other lights on the trailer work?
Check your fuses and look for a dead-short on the tail light wire (probably brown).
When are light required to be installed on trailer?
Lights are always required to be installed on a boat trailer. This is so no one runs into the back of the trailer, especially at night.
On a 1995 land rover discovery What is the dash board symbol that looks like a trailer mean?
It's a green light that should flash once every time you put your signal light on (either direction). This light tells you that the trailer wiring system that was built into the Disco is working properly. When you tow a trailer and connect the trailer lights to the LR wiring connection next to the hitch, the green "trailer" light on the dash should flash in sync with the signal light arrows every time you put on your signal light. This is telling you that your trailer lights are working properly. If the green "trailer" dash light does not flash, then you might have something wrong with the trailer lights or with the wiring. Unfortunatly Land Rover abandoned this feature on the Disco II.
How do you turn on the parking lights on a 2002 Volkswagen beetle?
The parking lights are turned on when the headlights are on and you pull out on the light switch. The parking lights cannot be turned on by themselves.
Where is your issue when all the boat trailer lights work when they are hanging but when you touch the bolts on the light to the trailer they get stuck on?
poor ground wire
Where is the trailer light fuse in a 2006 peterbilt 387?
I have no running lights on my 2006 Peterbilt 387 all of the lights work
