charging problem
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Elder User
Joined: Feb 2008
Posts: 640
Likes: 1
From: US/Baja border
charging problem
Hi guys this is my first post asking for advice and as a retired mechanic I feel somewhat awkward so help a old man out if you can.
I have a 77 F150 with a 300 engine.
I noticed one day it was not charging and I verified this with a dvm, the alt was a cheap rebuild and the regulator looked to be original so I put on a new regulator and rebuilt tested alt but still not charging.
All the wiring looks ok so I'm at a loss of where to look for the problem.
Any ideas would be welcome.
I have a 77 F150 with a 300 engine.
I noticed one day it was not charging and I verified this with a dvm, the alt was a cheap rebuild and the regulator looked to be original so I put on a new regulator and rebuilt tested alt but still not charging.
All the wiring looks ok so I'm at a loss of where to look for the problem.
Any ideas would be welcome.
Hotshot
Joined: Sep 2012
Posts: 17,708
Likes: 136
From: Calgary
I had the opposite problem a while back, overcharging. Was getting good readings and bad ones on my voltage regulator, turned out to be rotted cables on my battery and a voltage regulator. Cables on battery were replaced about a month before I bought truck along with alternator, starter and solenoid. 8 month old cables were rotted inside the sheilding. Not saying thats the problem but check that your wiring is okay and not rotted. It cost the po a lot more than it cost me.lol
Fleet Mechanic
Joined: Jan 2010
Posts: 1,287
Likes: 77
From: spring hill fl
I had the same issue with an old tbird. like yours the wiring looked ok but it wasn't. I peeled back the harness cover and about 5" back there was a split wire. no clue how it could have happened. fixed the wire and the charging problems went away. I'd start tracing the wires.
Laughing Gas
Joined: Nov 2013
Posts: 1,207
Likes: 60
From: S.E. Louisiana;so far USA
Hi guys this is my first post asking for advice and as a retired mechanic I feel somewhat awkward so help a old man out if you can.
I have a 77 F150 with a 300 engine.
I noticed one day it was not charging and I verified this with a dvm, the alt was a cheap rebuild and the regulator looked to be original so I put on a new regulator and rebuilt tested alt but still not charging.
All the wiring looks ok so I'm at a loss of where to look for the problem.
Any ideas would be welcome.
I have a 77 F150 with a 300 engine.
I noticed one day it was not charging and I verified this with a dvm, the alt was a cheap rebuild and the regulator looked to be original so I put on a new regulator and rebuilt tested alt but still not charging.
All the wiring looks ok so I'm at a loss of where to look for the problem.
Any ideas would be welcome.
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