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Why trailer brakes don't work when you press on the brakes everything is connected on f-150 2001?
Wiki User
∙ 17y ago
check wiring on your plug make sure the wire on your truck that has power when you press the brakes is connected to the wire for the brakes on the trailer Remember you must have a brake controller installed in the vehicle, just because the vehicle has a "tow package" does not necessarily mean you are ready to tow a trailer with electric brakes. The only vehicles that currently have this capability are the late 05 and 06 Ford trucks f-250 and up, and that is an option that must be ordered when purchasing the vehicle. If you have a brake controller, check the fuses, if the fuses are good, and the brake controller is NOT a digital one, the controller may not be levelled correctly.
Wiki User
∙ 17y ago
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Why would air release when you press on the brakes?
Do you drive a tractor trailer (semi) with air brakes? where is the air coming from when you notice this. This person's probably talking about a car......It is atmospheric pressure entering the vacuum booster, the air rushing past the valves inside.
Instructions on how to hook a trailer up?
Im not going to get into a gooseneck because you should already know how to do that. Now though A semi Trailer I will. 1. Staight tractor with trailer EVENLY 2. Get out of tractor a remove any hazard in path (take key out) 3. Return to tracor begin backing prcess 4. DONT hit the trailer lightly tap it. STOP 5. Exit tractor take key connect serive blue, emergency red, and electrical green. Make sure king pin is dead center with fifth wheel might sound sill make sure king pin is tight not wigling around. 6. Return to tractor press red knob in supplies trailer brakes air. After thats complete pull red knob out exhaust trailer air trailer brakes now locked. 7. SLOWLy back tractor into trailer the trailer will rise a few inches calm your little ass down its fine. the fifth wheel has a locking jaw that when properly working will lock between the head (bottom of fifth wheel and shank (top of fifth wheel. 8. Exit tractor take key service your work there should be NO daylight between the top of the fifth wheel and trailer. Oh yeah and if so grease fifth wheel. Push locking lever over locking jaw. 9. Go under trailer look at the locking jaw is the trailer on the outside of it if so you f'd up. Make sure jaw is completely shut between head and shank if it is great. 10. Just do a check of the trailer make sure its fine. Return to cab press red knob in release trailer brakes press press yellow knob in release tractor brakes. What ever you do after that not my problem.
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You have a poor or no ground between the vehicle and trailer.
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You have a warped rotor.
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Is that clicking sound a relay fuse when you press on brakes?
maybe
