Ford 7.3L Power Stroke (1999-2003) :: Fuse Keeps Blowing Out - No Parking Lights?
May 12, 2010
i have a 99 f350 psd, my problem is i don't have normal; FONT-SIZE: 100%; COLOR: dark green; FONT-FAMILY: inherit">parking</NOBR> and instrument lights, it blows fuse number 8 as soon as i turn the switch on. i checked all the wiring on my tail lights and the trailer hookups. i even disconnected the wiring harness going my tail lights and trailer hookups and it still blows the switch. #8 fuse is trailer tow electronic brake, illumination, park lamps, trailer tow park lamp relay coil. it also blows #4 fuse which is trailer tow backup lamps, trailer tow park lamps.
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I have a 2001 F-450 SD with 7.3. What the problems would for the blowing of fuse #3. The DLC fuse. I mean I know it goes to the cigarette lighter as well. but when not in use it still blows.
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I had a problem with this issue a few months ago, was 45 minutes away from home, blew the fuse to the starter. Switched another one in, blew it too. Had it towed to a shop, they did some diagnostics, felt like it was a short in the starter, replaced it and all has been well (as far as that particular issue) until this morning. Got in it, turned the key it cranked for less than a second and stopped. I pull the fuse, sure enough, blown. Swap it with another, it blows.
I know I have a bare wire in the column, the OD light wire is chaffed, I fixed it before but it must be worn again because I can get it to light up depending on positioning of the shifter lever and as I recall, every time the fuse blows the steering wheel is cranked to the left.
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Upon trying to start my 2003 f250, it keeps blowing the 15A "Transmission Range Sensor then to Starter Relay Coil" fuse. Initially the truck would still start if i did not use the aftermarket Viper keyless start. however, now it doesn't start at all and keeps blowing fuses. I contacted the guy that installed the alarm thinking it might be something on his end. He walked me through reconnecting the factory starter wires which would isolate the issue if it was something on his end. it's still blowing fuses. battery terminals are good and clean.
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Need to diagnose this before I start ripping wires:
Truck started blowing the # 8 fuse under the hood tonight (15 amp #8 - trailer tow electronic brake illumination, park lamps, trailer tow park lamp relay coil fuse) which also controls the dash board lights (can't see gauges at night) and the tail light lights (brakes lights work) are out too. Figure I have a short somewhere.
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I have a 95 f-250 psd with factory remote keyless entry. about 3 weeks ago i had a fuse blow that powers the keyless entry module, speed control, and a number of other systems.
If I replaced the fuse it blew right away so i got my wiring diagrams out and started unplugging parts of the circuit and my last attempt was to unplug the keyless entry module. presto no blown fuse so i got a module from a junk yard fixed the problem and now it has happened again. same exact thing. unhook the module and no blown fuse. i took the first module apart and saw no burned parts and no visible damage but here i am blowing fuses with no door locks, dome light and a few other things.
The fuse that blows is fuse 8. I am a mechanic and have full access to anything I need. I have another module under warantee but I want to be sure that its not something other than the module causing problems.
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I have an electrical problem and my parking lights will not turn off. I had to pull the fuse in the power distribution box (engine compartment) to get them to turn out.
Pulled the switch in the dash (lights still work) and the switch is good so it appears I'm getting power to the circuit somewhere in the harness? Literally, when I pulled the switch out of the dash and replaced the fuse, my lights came on.
Looking for a schematic for a 1999 F350 SWB 7.3PSD? Perhaps it's a relay gone bad?
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I installed a new trailer wiring harness onto the back of my 2002 F250 Super Duty with 7.3 diesel engine. Unfortunately, I was 180 degrees off on my wiring. When I hooked up to the camper I blew Fuse #115 (Trailer Tow Battery Charge) as it connected directly to the camper ground wire. I replaced the 20amp fuse and all other fuses were good. Currently, I have all the truck wires to the harness isolated and have power to all of them except for the parking lights. All the lights on the truck work fine.
My truck has a interior fuse panel on the driver's side as well as two small black boxes under the hood, near the brake booster. The under-hood boxes had only relays in them. Two relays in one black box, three in the other. The box with three relays had trailer left turn and right turn relays. which worked fine. The third in that box, apparently, is for the A/C clutch, controlled by fuse #10. The other black box (with two relays), apparently, are for 4WD Shift on the fly, controlled by fuse #111. So, no relay for the parking lights.
Next, I pulled the fuse panel out a little and checked continuity from the end of the parking light wire (brown with white stripe) at the back of the truck to the back of the fuse box and found that it was a good wire with no breaks or shorts to ground, however no voltage is showing at the parking light wire when I turn on the parking lights. The harness at the back of the fuse box has several wires going into it. The parking light wire (brown with white stripe) is in the same harness as the back-up light wire (black with green stripe) and the back-up light does have voltage, when I put it in reverse.
I'm not sure what happens inside of the fuse box, i.e., how does one fuse run a few wires... is there some kind of circuit board? I know the easy way would be to run a vampire connector from the truck parking lights, or maybe the license plate light to power the trailer lights, however, I'm just not built that way.
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I have an 03 6.0 F250. My truck started blowing fuse #45 and it would kill my gauges (fuel, oil, mph, rpm, temp, trans temp, and odometer) and I was just replacing the fuse and putting off the repair.
However, the most recent time my gauges blew, the fuse did not, and I put in a 20 amp fuse, in hopes that it would not blow so quickly, bad idea. So naturally, I ordered a new shift lever, in hopes that it would fix the gauges and I wouldn't have to deal with it anymore, but I think it was too late and something else needs to be replaced. What I could possibly have blown by having a larger fuse in there?
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I just finished a cab swap and I'm having a little trouble. Here's a link to what I've done : [URL] ....
KOEO the WTS light, battery light, SES light all stay on and no power to fuel pump. No communication with PCM (using AE). All fuses are good, but no power to PCM fuse (#22). When I apply 12v to #22, the truck will start and idle - but poorly because I still don't think fuel pump comes on. The idiot lights all stay the same.
I did get to pull codes while it was running and got stuff like IAT circuit high (its not plugged in), fuel pump relay short to batttery, and a few other short to battery things (park assist stuff IIRC). I thought that might have something to do with the redneck idea to boost the fuse with an external power source?
Just thinking while typing, I don't have 3rd brake light hooked up yet (just thought of that, I'll hook it up first) and bed/bumper are not installed, so no tail lights or park assist stuff is hooked up. I'm also not using overhead computer, so it's not plugged in.
My next step is to go back through all of the connectors and make sure something isn't 1/2 way plugged in or possibly plugged into the wrong place(s).
Looking thru the wiring diagrams is not a strong subject for me, but I was trying to figure out how power gets to the fuse and how PCM relay works (does it complete circuit to ground to energize the coil?).
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I have a 2003 F250 and dont have power at fuel pump, or fuse #30. I put power directly to fuel pump and it worked and truck fired right up.
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I have 1999 ford f250 superduty 5.4 v8 I noticed that my tail lights were not working I replaced the fuse as it was blown break lights worked until i cranked up and applied brakes. I replaced fuse again an checked brake lights they worked fine until i cranked truck and applied the brakes i did notice the wires were hot at brake pedal switch when they worked while not cranked. I replaced the cruise control release switch I was told that may be the problem since cruise didn't work. it fixed the cruise control but as soon as i pressed the brakes fuse blew again.I replaced brake pedal switch didnt fix it.
I then noticed a little smoke under tailgate i looked and the wire coming out of connector was hot while brakes applied and not cranked. i disconnected that wire put a new fuse in and brake lights worked in center light and passenger side without blowing fuse driver side however does not work. Because I disconnected the brake light wire to driver side green wire. When I reconnected the driver side brake light wire fuse blew.
So I have it narrowed down to driver side brake light. here is my problem. I have checked all the wires that i can see for bad or frayed /worn naked places i have found none I can get to the wires beside gas tank running the rail to check but it is doubtful that it is spot as nothing is rubbing along there. Could it be a relay somewhere? can i just run a new wire from brake light? if so where to i connect to? Is there a wiring harness i can just buy and replace the brake light wires from brake light to power source I have ran out of things to check on my own...
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OK I'm putting a plow on my truck. I am wondering if it's possible to add more circuits to the fuse box in some of those unused slots?
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I purchased 2011 F250 King Ranch Edition about 3 months ago. I'm loving the truck and not had any issues until 3 weeks ago. I locked the truck as usual using the key Fob, and upon returning to the truck, I noticed the doors weren't locked. After some brief trouble shooting, I discovered the the fuse was blown that according to the manual controls just the power door locks. I thought it was strange that a new truck would be popping a fuse so I replaced it...a couple of days later it blew again. This time I was locking the truck with the door key pad. I took it to the dealership and they checked it over and said they replaced the fuse and cycled it numerous times but could not reproduce the problem. The told me that they even put a call in to the Ford engineers and they said check the key pad for water intrusion. The dealership told me they disassembled the key pad and found nothing wrong....lock and unlocked the door some more and the fuse would not blow. I picked the truck up four days ago and the fuse blew again last night. Everything else works...alarm sets and goes off if any of the doors are opened. The only thing that I can find that doesn't work when the fuse is blown is the remote start.
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So I have a 1999.5 F350 diesel and the fuse panel under the steering wheel is acting up. I was driving my truck home the other night and I lost power and my truck shut off. I have had a problem in the past with the #30- 30 amp fuse ( controls the PCM and glow plugs from my understanding) that is under the steering wheel, I replaced the fuse and everything started working normally again. Until the other night when my truck shut off, so I replaced the fuse the truck drove again for 20 feet died again, I was able to hold the #30 fuse and allow my truck to start up again but would eventually killed the PCM and shut off again and would not start up due to what I believe the fuse location shorting it out and killing the power to the PCM preventing me from starting it up again.
I had my truck towed home and charged the battery and it started up fine the next morning. If I push on the #30 fuse my truck the shorts out and kills the power, I do not know if this is normal? The fuse is sitting loose in the fuse holder is there anyway making it fit tighter to prevent it from being so loose? I have read every other post online about the problems and tried everything they have recommended but still can not figure out what was wrong with my truck. I disconnected the fuel filter heater, and also the wastegate solenoid to see if that would prevent the truck from shorting out if I pushed the fuse it did not work.
What the problem could be causing the #30 - 30 amp fuse to be shorting out preventing everything from working? Or how to test the fuse panel and all the relays?
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Looking for some tried and true fix to make these parking brakes hold just a little? Winter coming and with a six speed would like some resemblence of a brake....short of a brick in the drive. I have adjusted.....no luck. New cables ( thinking maybe stretched)..no luck. Shoes are new. Did notice levers where cable attach look to be worbled out.....gonna try to tighten that are up a little to see if that works but.
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My 2005 f350 reverse lights just started to not work . So I checked the fuse and it was blown and every time I put new fuse in it blows, where to check. Sounds like a ground issue am I correct .
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So the other day my 20amp maxi fuse for my fuel pump decided to blow, put a new one in & everything has been going good since. Is it just a fluke or is this an indication my pump is going out? I inspected wires off the pump & connections for corrosion & that's good, fuel filter is also new about 2 months ago & I always run #1 diesel with a little additive in the winter.
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My friend and I were working on my truck and he was testing my AIH relay, as he was testing it the fuel pump was clicking on and off a few times over about 10 minutes. He explained that the current must be back feeding through the system and activating the pump. After testing the relay he determined that it non-functional / broken.
When we went to start it there was a strange buzzing from the fuse box area. After testing all of the fuses and then his code scanner not being able to connect to the truck we can only figure that the PCM is done.
The truck will turn over but not start. Any time the key is in the run position the buzzing noise is there unless you pull the PCM relay or the IDM relay. He says (I know very little about this stuff) that the IDM relay is trying to close but because the PCM is fried the IDM is not getting the signal to do so....?
So what now? Do I need a new PCM? He said something about it need to be reflashed to match the old one, is that right? Are all PCMs equal? What else should I know?
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1999 Mercury Villager Estate. The brake light wouldn't illuminate. Found that the brake light fuse (20A) was blown. Put another in and it blew as I was inserting it. Figure there's a short somewhere, so I've disconnected both brake/tail light units in the back, the towing light connection, and have even completely disconnect the 3 brake light switches under the dash (yes, 3.... 2 directly attached to the brake pedal and one attached to the e-brake). Still, when I insert a 20A fuse (which is what is called for), it immediately blows.
Since I've disconnected the brake light switches, it seems to me the short can't be past that on the way to the back of the vehicle. Maybe I'm wrong though. It seems the short must be either between the switches and the fuse box, or somewhere between the fuse box and the battery. Unsure if the wiring routes through any relays under the hood, but I'd think it would at least have to go through one of the relay boxes since that's what eventually gets directly connected to the battery. I've tried using my multimeter to measure the voltage and resistance on either side of the space where that fuse goes, but I'm unsure what to expect from a reading like that, so those results are inconclusive.
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I completed the high idle mod on my '05 Excursion 6.0 a few months ago. The 12V source is the blue/white wire that up/right of the ODBII connector outlined in the high-idle mod how-to.
For some reason, every couple of weeks, the 10-amp mini fuse at #29 will blow. It will work well for several weeks - then randomly pop the fuse about once a month.
Not sure if maybe I should swap out the switch I'm using to toggle the high idle, or maybe if an increase in the fuse amperage is required...or something else?
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