Question about Ford F-150

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Brake light fuse blows imediately when you put it into receptical. SOMETIMES. sometime it dont blow until driving. also the blinkers are blinking fast like a bulb is blown but they all seem fine. the fuse pannel says the same fuse runs the automatic transmission shift interlock. what and where is this? the trans also sometimes shifts into OD when going slow 20mph the brake lights arent working help please

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Seems like you got a short circuit!!!!

now all the circuits from what u described above is individual circuits so more than likely you burnt a wire in the main harness causing those to short out.. And its a live wire.. now what u need to do is change the harness or you can track the harness loosing out all the loom from the fuse box under the hood all the way to the inside of the car then track the rear harness, in the same manner,, trust me you will see the wire thats burnt. now you need to cut the burnt wires out and replace it with new ones..

try removing the brake fuse and see if the indicator lights work if they do then chances are the short is in the rear harness..

Posted on Oct 13, 2010

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Hello. you definitely have a short in the transmission. If you have an AAMCO repair shop nearby drive there. I like AAMCO because they give you a free computer scan to help identify the cause of the problem. Joe

Posted on Oct 12, 2010

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1 Answer

My 2006 Ford focus keeps blowing blinker fuses. Sometime they last a few days and sometimes only a day. It's all the blinkers including hazard lights....please help


Check all the wiring all the way back to the lights, somewhere there is a wire that is rubbed through and grounding out the circuit, this blows the fuse, as to where the wire in question will be is why most mechanics hate electrical problems like this. No simple fix in most cases.

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My turn signal fuse blowed got new one now they dont work why


canada or USA, (diffr. laws, different wiring, even DRL up there)
station wagon or NOT?
THE TURNS FUSE BLEW OUT. 2nd time, 3rd,,,?????
that means the circuit is overloaded or shorted.! (prevents fire)
but did it blow a 2nd time, why not say so???

all 4 lamps dead. or stuck on, or flash odd. or what? dim?
does the cluster lamp flash, , in blink or emerg. mode?
wont work , means what, (dead or stuck on or dim)?????
do emergency flashers work? ,dead, stuck on what?
does car drive perfect day or night?
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we see all this , 1st 5 min in a shop, zero here.
ive answered Forenza blinks here, many times.
ever search?

ill now answer by guessing USA non stationwagon and no DRL.
dash box fuse 4 kills blinkers

EF1 (engine fuse) 1 good?
dash fuse 14 and EF1 can kills emerg. flasher

so of Emergancy flash lamps blows fuse 14,(smaller of 2)
then the blinkers are in fact shorted.
does it?
if yes, then find out which side blows the fuse 3.
turns left blow or turns right blows.
so if say turns right blows, F4 fuse.
if true ?remove all bulbs front rear right bulbs.
does the fuse hold now,(means not blown)
then buy new lamps there. problem solved
bulbs can in fact short.
not just blow open.
Tell the full story and all this gets easy.
For sure emergency flash,

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Right blinker blinking fast and then now sound or light on either right or left and brake light does not work now.


when you have a fast blinking light the front or rear turn signal is probably blown and for your brake light check your fuse.

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I have a 99 Jeep Grand Cherokee Limited i have brake lights that work when i apply brakes, but as as soon as i turn my headlights on the fuse blows and i have no working tailights with the headlights on. ...


There is definitely a short in the park lights system. Did you just have a radio installed....since the illumination wire sometimes gets grounded and will cause that fuse to blow until you fix that wire.

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1 Answer

NO BRAKE LIGHTS - FUSE BLOWS


Really need more info but if it blows fuses you have a hot wire touching metal somewhere......
or something plugged in where it shouldnt be.....Or wrong size fuse..You have a brake light switch attached to the brake pedal which is common to fail.....also brake light bulbs and fuse ...check where bulbs are installed at recepticles....check for naked wires touching metal.....also use a good rated fuse...
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Normally with the blinker blinking really fast, it's telling you that one of the bulb is blown, front or rear signals. Check your fuse, and fuse relay to see if it would fix the promblem

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1 Answer

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Sounds like a problem with the turn signal switch.

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