No Start condition -- electrical problem???
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Senior User
Joined: May 2004
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No Start condition -- electrical problem???
Hi Everyone,
I should have learned by now not to do my own wiring on my truck. I'm installing a new stereo and I think I've fried something.
Truck is a 2000 Excursion 7.3. I hooked up a switch incorrectly and had an electrical arc. The sizzle was sickening.
After that, I'm not able to start the truck. No dash lights, nothing. Completely dead. Many accessories still work -- lights, wipers, etc. but no instrument cluster lights, no airbag warning light, etc. Cluster stays dark, and of course no starter. I don't even hear any fuel pump action.
There's no power on the ignition wire under the steering column, so whatever I fried is probably upstream from that.
Help!!!
I should have learned by now not to do my own wiring on my truck. I'm installing a new stereo and I think I've fried something.
Truck is a 2000 Excursion 7.3. I hooked up a switch incorrectly and had an electrical arc. The sizzle was sickening.
After that, I'm not able to start the truck. No dash lights, nothing. Completely dead. Many accessories still work -- lights, wipers, etc. but no instrument cluster lights, no airbag warning light, etc. Cluster stays dark, and of course no starter. I don't even hear any fuel pump action.
There's no power on the ignition wire under the steering column, so whatever I fried is probably upstream from that.
Help!!!
Posting Guru
Joined: Jul 2006
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First check all fuses. But my guess is you have blown a fusable link that looks like a wire. Probably connected to the starter circuit and possibly on the starter relay, but I don't have a schematic in front of me. If the link blew clear it should be easy to see. If not you will have to do voltage searching to find it. Best of luck. Jim
Posting Guru
Joined: Jul 2006
Posts: 1,720
Likes: 1
Ok,, went and found wiring diaghram. The fusable link (based on my drawings) should be a heavy gray wire that comes from the starter relay on to the battery junction box. There will be 4 gray wires. The gray links will connnect to a black / orange heavy wire that goes into dthe battery junction box located on the driver fender well under the hood. This brings the power to the fuses and relays. I don't know exactly what happened and what you were hooking up. But if you don't have power to the junction box from the black / orange wire you have a blown link. The light green / violet wire from the junction box goes to your ignition switch. There is also a 50 Amp fuse in the juction box that might be blown preventing power from getting to your ignition switch. So take a look at these and reply back on what you find. Hopefully you have a voltmeter and can do some voltage checks. Best of luck Jim
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Senior User
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Thanks Jim, I traced the problem and it turns out it was a 50 amp fuse you mention that was blown.
A note for other newbies like me; Those square style fuses in the tray under the hood - a blown fuse isn't as easy to spot as the blade type. You have to look pretty carefully.
Thanks again Jim for guiding me in the right direction.
Mike
A note for other newbies like me; Those square style fuses in the tray under the hood - a blown fuse isn't as easy to spot as the blade type. You have to look pretty carefully.
Thanks again Jim for guiding me in the right direction.
Mike
