Question about Ford F-250

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Can you tell me which of the fuses in the fuse box are for the trailer lights? I have traced the wire connections back and all looks good and wired correctly but I cannot locate the correct fuse. Thank you

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The trailer wiring runs directly from the turn signal and running light fuses, if the fuses are good check for a bad ground in the wiring on the trailer

Posted on Aug 27, 2010

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I need a fuse diagram for a 2006 Ford F250 2WD. My lights all work great on the PU but when I connect the trailer the lights work but no brake lights or turn signals.


If all the lights work properly with the trailer wiring not connected then the truck itself is fine. If attaching the trailer wiring causes the lights to permanently stop working on the truck then you are blowing a fuse and it will need to be replaced. Your owners manual will show you where the fuse panel is. You should be able to check the wiring plug at the back of the truck to be sure it is working properly with a test light and a helper. If the power for signals/brakes etc are not all working at the plug, then trace back and fix these. If all is good at the truck's plug, then the trailer wiring must be faulty. Again, go through it and fix anything that is broken or corroded. Of course it goes without saying, make sure all the bulbs are good.

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1 Answer

2000 chevy cutaway 3500. clp lights on the box are out but all of the fuses are good. any ideas??


trace down the wiring. check any splices or trailer wiring hookups, check for ground to the box lights

Jun 29, 2013 | Cars & Trucks

1 Answer

I am putting in a trailer brake controler. I found the wires to hook the plug to, but where do they come out at the front of the truck? Are they under the dash?


Look at the harness on the back side of the fuse box under the hood. Pull the fuse cover and the fuse box housing. You will probably have to remove the fender brace. They usually run the wires to connect to in the harness and bend them back into the wrap. Should be orange and blue. You will have to splice into them under the hood and run wires into the cab along with a GOOD ground and the drake switch and a hot fused wire. Look at the owners manual and see if fuse post 1 and fuse post 2 are connected. If not, one will feed to the brake controller and the other to 12 volt power to the trailer... Blue brake and orange to trailer power.
Also look at http://www.etrailer.com/faq-wiring.aspx. Full of useful info.

Sep 17, 2010 | 1996 GMC Sierra

1 Answer

Fuses


You didn't say if your trailer wiring was factory or after market installed so... look under the back end and trace the wiring from the tail lights. Look for a splice connection. There may be an inline fuse installed between the tail lights and the fuse block. Also look for a bad wire(s) which may have caused the fault.

Jun 29, 2010 | 2003 Ford F250 Super Duty Crew Cab

1 Answer

Trailer wiring


Have you checked the fuse box under the hood? There are seperate fuses for the truck lights and the trailer lights. If the fuses look good use a 12 volt test light to check for power on the turn signal pins when the brake is pushed. The brake lights and turn signals use the same wires to work. Power here would indicate the wiring and fuses on the truck is all good, meaning the trouble is on the trailer. Check the bulbs to be sure they are the correct ones, they should be dual element bulbs. Make sure you have a good ground on the trailer, usually the white wire in the 4 way plug is grounded to the trailer frame, do not depend on the trailer ball to be the ground, this is asking for trouble.

Apr 06, 2010 | 2001 Chevrolet Silverado 1500

1 Answer

My trailer wiring on my 2001 gmc sierra works i just dont have brake lights. all the lights on the truck work. its a 7 pin factory install ive never had problems until now. ive checkd all the fuses and...


First replace the trailer light brake/turn signal fuses. I have seen where the fuse will show good, but loose connection in the block. You can easily do it by using the flashers. Using a test light you can check power in and out of the fuse. Just touch the tester to the metal pin on top of the fuse... on both sides. Power in and power out. If power is there on both sides and still nothing below the fuse box, the box is bad. Not a common problem. Also check http://www.etrailer.com/faq-wiring.aspx.

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1 Answer

Dodge trailer wiring


Check the owners manual to be sure of the location of the trailer fuses. Most have several locations for the fuses. Other than that, look for a loose or corroded connection. Also check http://www.etrailer.com/faq-wiring.aspx.

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2 Answers

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Did yo check the fuse panel inside the truck its located on the drivers side dash , you have to open the driver side door, in there is a 10 amp fuse that is linked to rt trailer brakes and rt turn signal for the trailer, if the fuse is good there is a black box under the dash located on the floor on the driver side, just to the left of the break, thats where must of the plug in wire harness is for the trailer breaks!

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1 Answer

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I have seen once before that the fuse box was bad on a 2003 Dodge 3500. I had power in and nothing out. We had to replace the box. Not cheap! Hope it is simple like a loose connection though. I think I had to pull the inner fender on the drivers side to access the bottom of the fuse box. Pain in the ****, but...

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1998 GMC Sierra Signal Fuse Blowing


it seems you have a short in either one of the lights or interlock. all are connected to the same fuse. trace the wiring from the fuse box back to the component. Using a test light test in between the wires. check for any obvious breaks in the wiring.

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