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Answered 2007-04-20 01:22:21

Make sure you have a good ground

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Are you getting power to sockets? Make sure you have a good ground circuit


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You rewired your trailer and you have all of the lights but no brake lights?

Your trailer tailights are dual-filament, with one being the running lights and the other the brake lights. You need a separate power source from your towing vehicle's brake lights to power them. The easiest way to do this is go to U-Haul and but a set of their trailer towing taillight bulbs for your towing vehicle. The bulbs replace your standard tail/brake light bulbs, and they have two wires coming out of the base of the bulb. One of the wires connects to your trailer's running lights, and the other one connects to your trailer's brake light circuit. I'm trusting that when you re-wired your trailer, you ran two wires from the taillight socket, one for the running lights and one for the brake lights. In some trailers, the brake light circuit also doubles as your turn signals. Good Luck.


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What is the purpose of the Control Unit and Control Unit harness for the towing hitch wiring for a 2005 Honda Odyssey?

The Control Unit and Harness are strongly recommended if you are going to tow anything that requires lights/brake controls. FYI, you don't have to get HONDA control units, most businesses that sell trailers sell various name brands and can do the wiring for you. Anyway, the wiring for the taillights and brakes lights of the vehicle are not strong enough to carry enough power to supply the electrical on a trailer (very dim-could cause a short). The Harness connects a power source (battery) to the trailer wires. The Control Unit is connected to the vehicle wiring as well as the Harness. When you step on the brake pedal, the Control Unit senses it and allows the power to go to the proper wiring on the trailer directly from the power source, therefore you will have brighter lights on the trailer. The same for parking and turn indicators. This is worth the money. I have this set up on my 2003 Odyssey.


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Why wont your trailer brake lights work?

If you have a 1998 or newer it could be a fuse in the power distribution center under the hood. The whole trailer light system is fused through there.


Is there a fuse for a factory installed trailer wiring harness on a 2004 Chevrolet Silverado Z71 The lights work on the truck but no power goes to the trailer?

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Why does your stop fuse blow when you tow trailers?

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The trailer wires are not fused. If the corresponding lights e.i. right turn, left turn, park, or stop lights work on the vehicle, then the corresponding wires of the trailer harness should have power at the same time (have someone put their foot on the brake and the brake light wire will have 12 volts while the brake light of the vehicle are lit. Same with the turn signals). Remember that one of the wires is a ground and one is available for an auxiliary use.


Is it legal for trucking companies to not put the tags on the vehicle?

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Do you need a CDL if you are hauling a trailer with electric brakes?

If the total weight rating of the combination (power and trailer) is over 26,000 lbs., and it's not a vehicle under exemption for CDL requirements, then yes.


Trailer backup lamp relay location on 1999 Ford E-350 not the switch - the RELAY for the TRAILER backup lamps?

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How do you convert 24 volt trailer lights to 12 volt?

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How much can a truck gross weight with a 34 ft trailer?

Well, that's going to depend on the Gross Vehicle Weight Ratings of the power unit and of the trailer. If it was a tractor-trailer with a trailer that short, then it wouldn't be able to gross 80k - in order to do that, the bridge between the drive tandems on the power unit and the tandems on the trailer must be at least 35 feet - a length greater than the trailer you described. You'd need some specifics about the tow vehicle and the trailer in order for this question to be answered accurately. We only know a trailer length - we don't know the GVWR of the trailer, and nothing about the tow unit, which could be anything from a Class 1 truck (0 - 6000 lbs. GVWR) up to a Class 8 truck (GVWR in excess of 33,000 lbs).


What would cause my tail lights to go out completely after plugging my standard trailer harness into the u-haul trailer harness by accident on a 1996 Ford Explorer?

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What kind of vehicle is the Sierra 4x4?

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When you plug your boat trailer lights to your 2006 dodge ram 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?

Based on experience with my own 2006 Dodge Ram 2500, your TIPM may have failed. In the infinite wisdom of Dodge Chrysler engineers and management, the year model 2006 and forward has a TIPM which controls the power circuites to the trailer harness - there are no fuses, only computer module. For reasons unknown except to profit the corporation and dealers, if there is a trailer fault the TIPM shuts off power to the effected trailer circuit, which then must be reset by the dealer. If the circuit shut out condition repeats more than 5 times, then the TIPM must be replaced (I was quoted $711). More information around the TIPM and SB's: http://dodgeram.info/tsb/2006/08-021-06.htm There is no information in the owners manual around the TIPM and how to protect it from trailer wiring faults. == == The trailer lights working on another vehicle suggests that the trailer wiring is all done correctly. You did not mention if the tail lights and turn signals on your Ram pick up are working, or not. IF your truck tail, brake, and turn signal lights operate properly, then there is nothing wrong THEIR FUSES OR CIRCUIT BREAKERS, leading to the conclusion that the problem is in the very short section of wiring harness which is is supposed to be properly wired into the tail light, break light, turn signal for your truck. None of the trailer lights working when plugged in, suggests that the ground wire in the harness is open/not connected. IF the trailer lights worked, but turned on the wrong lights when activated, would suggest that some of the wires were "crossed," miss routed. Again, the fact that none of the lights are working when plugged into your truck indicates that the short wiring harness between the light system on your truck to the connector plug is not connected properly, and probably has an "open" ground. As a mechanic at a Dodge dealer, Answer #2 is most likely.


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1998 ford f150 5.4 liter v8 triton 4x4 20 amp fuse is not blown but has no power to it for the trailer stop & turn but has running lights



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