electrical short
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electrical short
i have an 02 F-350, auto tranny, and when you shift from 2nd to reverse, it blows the fuse. the accelerator and gueages dont work when this happens. wondering what it may be a short in? does it have something to do with the brake pedal? because when you go from drive to reverse, you touch the brake... any help would be great. thanks!
Senior User
Joined: Sep 2006
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From: Linden, VA
What fuse is blowing? I would think it would not have to do with the brake because it does not blow when you just hit the brake. More likely, I would suspect something in the steering columb or the trans itself.
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
Originally Posted by jwolf1
i have an 02 F-350, auto tranny, and when you shift from 2nd to reverse, it blows the fuse. the accelerator and gueages dont work when this happens. wondering what it may be a short in? does it have something to do with the brake pedal? because when you go from drive to reverse, you touch the brake... any help would be great. thanks!
Senior User
Joined: Sep 2006
Posts: 276
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From: Linden, VA
I show fuse #15 as a 5amp. In my truck it is located 4th from the left on the second row and it controls: Stop lamp switch, Generic Electronic Module, PCM,ABS Brake Shift Interlock, Cluster and PCM memory.
I bet this is the one. The brake shift interlock sound very likely. I agree with Tenn, you are going to have to open up the column and blow a few fuses to find the problem.
I bet this is the one. The brake shift interlock sound very likely. I agree with Tenn, you are going to have to open up the column and blow a few fuses to find the problem.
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
Edit: Whoops, my bad, I looked at his profile. Been distracted. Sorry.
Last edited by Tenn01PSD350; Apr 25, 2007 at 03:23 PM.
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Fleet Mechanic
Joined: Feb 2005
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From: Northern Colorado
Originally Posted by jwolf1
i have an 02 F-350,........
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Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
It shows:
F2.45 10A Overdrive cancel switch (7G550), Accelerator pedal position sensor, Four–
wheel drive control module, Instrument cluster – Excursion
Clutch pedal position switch, Auxiliary Powertrain Control Module (APCM),
Accelerator pedal position sensor, Overdrive cancel switch (7G550), Four–
wheel drive control module, Instrument cluster – Pickup
I bet it is in the column. Probably the OD switch if not the wiring. BTW, it appears the spec on my diagram calls for a 10amp fuse.
F2.45 10A Overdrive cancel switch (7G550), Accelerator pedal position sensor, Four–
wheel drive control module, Instrument cluster – Excursion
Clutch pedal position switch, Auxiliary Powertrain Control Module (APCM),
Accelerator pedal position sensor, Overdrive cancel switch (7G550), Four–
wheel drive control module, Instrument cluster – Pickup
I bet it is in the column. Probably the OD switch if not the wiring. BTW, it appears the spec on my diagram calls for a 10amp fuse.
Fleet Mechanic
Joined: Feb 2005
Posts: 1,797
Likes: 1
From: Northern Colorado
Tenn is correct. It's the same old problem that Fords had since the early OBS trucks. The overdrive wires from the shift lever run over the column and rub the wire insulation off. Intermittant shorts whenever you move the lever.
I would say the the wrong amperage fuse is there because someone ran out of the 10A because it kept popping them and only had 5A left.
I would say the the wrong amperage fuse is there because someone ran out of the 10A because it kept popping them and only had 5A left.
