ignition fuse keeps blowing
Thread Starter
|
New User
Joined: Mar 2005
Posts: 3
Likes: 0
ignition fuse keeps blowing
C'mon guys I need suggestions....my 97 F-150 blows the ignition fuse every time I try to crank it. I thought it was the starter and replaced it but needless to say I have a new starter and am still blowing fuses. any suggestions on what to look at next would be great.
Elder User
Joined: May 2002
Posts: 778
Likes: 1
Without starting, just turn the switch to run position, does the fuse pop? How about if you turn it back to the acc position? Are all the items in the truck turned off, like the radio, heater a/c fan, the a/c selector to off? cigar lighter removed, cell phone power cord removed?
DP
DP
Hotshot
Joined: Jan 2004
Posts: 19,762
Likes: 1,079
From: St Louis
Originally Posted by 1979ford
If you have a high impedence volt/ohmmeter you can put that inplace of the fuse if you are trouble shooting. Then see how many amps your pulling through the fuse box.
Actually, an ammeter is a low-resistance device.....
Steve
New User
Joined: May 2004
Posts: 15
Likes: 0
I had the same problem with my 98. Turned out to be a wire bundle that runs down the passenger side, from starter relay on firewall to the trans sensor. The bundle touched the exhaust and burned through. You have to follow the wires with your hand and see if you can feel where it touches the exhaust. The wire that caused the problem for me was the Trans position sensor. That wire is part of the starting circuit. Evertime I tried to start my truck, one of the fuses inside would blow(starter relay fuse). I replaced the relay and th starter before I found the wire bundle burned through.
Thread Starter
|
New User
Joined: Mar 2005
Posts: 3
Likes: 0
Trending Topics
New User
Joined: May 2004
Posts: 15
Likes: 0
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
Thread Starter
|
New User
Joined: Mar 2005
Posts: 3
Likes: 0
Tony...your a genious....I checked and thats exactly what it was...I have been hearing a rattle under the truck since the last time I took it to the mechanic and I could never find it. when I started at the top of the wire bundle and worked my way under it I found a bracket that was supposed to be holding the wires hadn't been put back on and was left dangeling. The whole bundle was laying against the exaust and was grounding out. I pulled it off....put in another fuse and it started right up. Now at least I can get it up on ramps to fix all this. Thanks so much for your help.
