Ford Super Duty (1999-2016) :: Overdrive Switch Blowing PCM Fuses
Sep 16, 2007
Just recently I started blowing PCM fuses (#19 in the fuse panel) After replacing lots of fuses, I finally figured out what was causing them to blow. I unhooked the overdrive switch, and no fuses blow. I can't see anywhere where the wire is chafed. Maybe it is chafed, and I can't see it or the switch is bad. Can the whole OD switch be replaced? If so, how??
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2000 7.3L SD .. The check engine light is on and if you hook it up to the reader it kills the engine and if you replace the lighter fuse it has power and if you hook it up to trailer it blows fuse and no power any...
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I have a 2006 F350, it keeps blowing fuses for the brake/turn signals. The puzzling​ part is it only does this when the truck is running.
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2001 F450/6.8. The trim ring is missing on the shift lever switch and the switch doesn't seem to light up or take the truck out of overdrive when pressed. Truck shifts just fine in all other aspects. Fuses all appear to be good.
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I had a fuse blow today that runs the throttle and we could not move it. Replaced it and it blew again. I think this fuse is blowing because the wires on my overdrive are broken. Is there anyway to disconnect the overdrive until I can get replacement parts? As there not enough wire there to put them back together.
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The switch for turning overdrive off that's located on the auto trans shifter stopped working. I've taken off the column cover to see if the wires have been severed from the tilt wheel, but nothing wrong there. I also checked the fuses, and all is well. Is it possible that the switch is bad at the end of the shifter, or somewhere farther down the column?
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I did a bad thing last night, I put a jumper in the 20 amp cigar/data link connector and all kinds of things went out, will not shift out of park, no directional, power windows, power mirrors, no brake lights ,no hazards, no wipers, no interior lights and I don't know what ever else is not working.
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02 f350 xl with factory cd player. I have power going to the unit like the clock but will not turn on completely. I have checked all the radio fuses and they are fine. I also swapped another factory radio from another one of my trucks and it does the same thing. Any thoughts?
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About 11pm 2 nights ago on our way to Florida, hit a nasty bump on I-95 in SC and there went the fuse to the tail lights and dash lights (#17 I believe). Obviously something shook loose from the jarring of that bump and blew the fuse. I've blown this fuse before, but I thought it was due to a cracked LR tail light assembly holding water, which was replaced last weekend.
Now I replace the fuse, and as soon as I hit the headlight switch...it blows again. Holding my breath running around FL at night until the man pulls me over for no tail lights. So far, here's what work has been done:
- Replaced entire LR tail light assembly with new one, new bulbs, new bulb plugs - Sprayed electrical cleaner all over harness plugs, and used electrical grease to hook it back up
- Sprayed electrical cleaner into both trailer plugs
- Did replace both batteries last weekend - noticed on the drivers side battery appears to be some relays next to the battery on the fenders - one appeared to be beat up probably due to prior battery replacements - no clue what they do
I am at a total loss. Worse fear is I can't figure this out and I have to turn it over to the dealership
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How many gear shifts I should have on my 6.0 2004 super duty, Ive counted 5 but it seems not to be in overdrive, I'm running a little over 2000 rpms at 65 mph?
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My overdrive recently stopped working on my 2003 F250 and I also noticed that the light on the shifter is not lit indicating that OD is off. When I push the button on the end of the shifter the off light doesn't come on like it used to. I have noticed that sometimes after I shut the engine off and re start it will go into overdrive as normal but the button will not light to off or turn OD off when pushed.
I have been reading about chafed wires in the column where it comes out of the shifter but most guys are saying their off light is blinking and their trucks will not come out of overdrive when the button is pushed. My question is, should I check for the chafed wires in the steering column? The transmission shifts great , just not going into OD all of the time and its killing my fuel mileage turning 2900 rpm at 65 mph.
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Last year I bought a used '99 F350 w/ ~$135K miles on it. I later noticed that when I pressed on the Overdrive button (automatic transmission) which is on the steering column gear change lever, nothing happened. The overdrive light did not come on and the gear did not change to overdrive.
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Tonight i noticed overdrive flashing. No changes in shifting, truck shifted fine. I shut it off when i got home, started back up, light was not blinking, not sure if its like the check engine light and stays on or not. Where light blinks but shifts fine?
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Overdrive light started flashing this week on my 2000 F450 7.3 mason dump. It only does it when it shifts into 4th gear once it hits that gear at about 35mph the overdrive light flashes until you restart the truck and it resets. Does the same thing all the time but DOESN'T flash if i'm driving around town on back roads and never get to that gear. Could this be something minor besides the transmission starting to go? It drives and shifts fine even when the light is flashing. I wait to get the error code read?
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2006 F250 5.4l 4x4, long box, quad cab
Current issue: No overdrive / slipping into neutral / rough going into reverse
Codes: I don't have exact code but will get (p0755)... but shows shifting solenoid B malfunction ( this is the OD/Reverse one) check engine light on and tow light blinking
So whats been done: shifting solenoid B (OD/Reverse) was replaced (used part) inspected valve body and o rings... all good... worked for a week... then exact same issue. Transmission showed no signs of gear damage, oil looks good
Next: Replaced shifting solenoid B again (new one) and transmission wiring harness. Still no change, same codes. Seems to be having a communication issue between transmission and PCM? However continuity of wires and connectors seems ok.
One more piece of interesting info. Every-time before the truck slips I hear clicking coming from the fuse/relay panel under dash drivers side. No clicking no slipping... however never goes into OD at any time.
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I recently purchased an 02 F250 v10 4x4 with 150k from a local auto auction. The transmission, for lack of a better term, will "grunt" when going into third and in and out of overdrive. It doesn't seem to slip at all and the fluid looks slightly discolored, but it does not smell burnt. No Torque Converter whine either. A friend of mine who has owned 10+ SDs for his business said I may need to replace the TCM. Not too sure about that, because other than the strange noise, the truck seems to shift normally.
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I'm having an issue on my 2002 F350 7.3. Today I hop in it and drive off I notice my speedometer stopped working. My overdrive light on the shifter started flashing. The trans seems like its not shifting correctly. It will eventually shift into overdrive but not always. Also now when I start off my fuel gauge raises and when I come to a stop it drops all the way to E and causes the ding and fuel light to light up. I figured this was all due to the VSS being bad. So I drove over to Autozone bought another VSS and a cheap tool set and changed it in the parking lot. No dice. I do have a scanner to pull the trans code but its late and I just got home.
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I have a 2006 F250 with the 6.0 PowerStroke and automatic transmission. I just purchased this truck at an auction about a month ago.
Today I notice the transmission is not shifting into overdrive. No warning lights. If I press the tow/haul button in no change but the tow/haul light does come on. If I press it again (to turn it off) the tow/haul light goes out but still the transmission will not shift into overdrive.
This leaves me at about 2000 RPM at 68 MPH. I just had a Ford dealer perform Transmission service last week. (20,000 miles after the last recorded service.)
I am already not happy with the service I received at the dealer so I am really hesitant to take it back to them if it is something not related to the transmission service they performed.
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1999 5.4 ... I was just driving down road and truck suddenly wouldnt shift into overdrive/higher gear. pulled to side of road and the motor was revving very high at 2500 rpm. shut truck off and on a few times...kept doing it until finally after a while it went back to normal....
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I have a '99 F250 SuperDuty Diesel with an Automatic Transmission. There is a button on the end of the gear shift which allows you to turn off overdrive -- in other words the transmission won't shift into overdrive once you press the button.
Here's my problem. I start off driving normally. I've not done nothing to the overdrive button and the truck shifts normally into overdrive. 10-15 minutes down the road, the overdrive light (which indicates the state of the overdrive button) is FLASHING. Pressing the button doesn't stop the flashing. Once this flashing starts, the only thing I notice is a much more abrupt shift from 1 -> 2 gear.
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I just got my led switch back lights in for my 08 camry. But I have run into a problem I have installed all four led signal lights (switch backs in the front and led ambers in the back) and the led flash relay for my car. What is happening is that the led will turn on for a couple of seconds and then the fuse for the signal lights burns out both the one under the dash and the one under the hood.
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