charging problem, 3 shops cannot figure out
Thread Starter
Junior Member
Joined: Sep 2010
Posts: 6
Likes: 1
charging problem, 3 shops cannot figure out
1997 5.4. new alternator and battery.
will not charge. Can make it charge if I run a jumper to the plug on firewall that comes from the alternator. I have taken it to 2 ford dealerships and one private mech with no remedy. All 3 shops say alternator is good, but I can only get it to charge the battery with a jumper from positive to the plug on the firewall that goes over to the top of the alternator. They are telling me it is some sort of trigger wire that switches the regulator on and off.
Please help if you can. thanks
will not charge. Can make it charge if I run a jumper to the plug on firewall that comes from the alternator. I have taken it to 2 ford dealerships and one private mech with no remedy. All 3 shops say alternator is good, but I can only get it to charge the battery with a jumper from positive to the plug on the firewall that goes over to the top of the alternator. They are telling me it is some sort of trigger wire that switches the regulator on and off.
Please help if you can. thanks
Last edited by whamo6; Sep 30, 2010 at 10:31 PM.
Senior Member
Joined: May 2010
Posts: 664
Likes: 0
From: Michigan
my brothers truck wasn't charging properly he had a new alternator and battery. it ended up the fuse had a hairline crack in it, you could barely see it. it took the tech awhile to figure it out at the dealership
Thread Starter
Junior Member
Joined: Sep 2010
Posts: 6
Likes: 1
Checked fuses
Wow! Thanks for the diagram.
I checked continuity on the mega fuse and the inline mini. Both seem ok.
The only way I can get it to charge the battery is jumping the + battery to the green/ w red stripe wire that comes from the alternator.
Could that megafuse be bad, even if it has continuity?
I appreciate all of your help. Trying to get it fixed so my son can use as his first vehicle.
Thanks
I checked continuity on the mega fuse and the inline mini. Both seem ok.
The only way I can get it to charge the battery is jumping the + battery to the green/ w red stripe wire that comes from the alternator.
Could that megafuse be bad, even if it has continuity?
I appreciate all of your help. Trying to get it fixed so my son can use as his first vehicle.
Thanks
Thread Starter
Junior Member
Joined: Sep 2010
Posts: 6
Likes: 1
solved!
Thanks to the diagram you provided. I tracked down the 10 amp fuse that the green/ w red wire led. It is in the cab fuse box. Shows it to be for air bag diagnostic and instrument cluster. I changed this fuse and it started to charge.
Thanks so much for your help!
Thanks so much for your help!
Trending Topics
Senior Member
Joined: Oct 2010
Posts: 455
Likes: 22
Since the instrument cluster fuse was bad, were the instrument panel lights out?
Member
Joined: Oct 2010
Posts: 43
Likes: 0
From: Florida
the same thing happened to me my problem was the alternator ground box in the dashboard i took it so many places no one could figure out was wrong i took my to meineke and they took my truck completely apart and found the problem it only cost 350 so it wasent to bad but my truck runs perfect now