Charging system wack
Thread Starter
|
4wd High
Joined: Dec 2025
Posts: 9
Likes: 0
Charging system wack
95 f150 5.0,
Had an alternator go bad on me recently I replaced it with a 3g alternator, and now it isn't charging, are the 3g wiring harnesses any different than the 2g wiring harnesses, battery and alternator are good
Had an alternator go bad on me recently I replaced it with a 3g alternator, and now it isn't charging, are the 3g wiring harnesses any different than the 2g wiring harnesses, battery and alternator are good
Fleet Mechanic
Joined: Oct 2025
Posts: 1,709
Likes: 373
You don’t have to change nothing but the plug and run a case ground wire. Bigger power wire is a good idea, but it would work if you used the existing. Amperage difference depending on how big could have overheated the charge wire.
Fleet Owner
Joined: Oct 2005
Posts: 20,785
Likes: 1,751
From: Kentucky
Very common issue. Verify the Light Green/Red wire has power with the key in the Run position. That is the exciter voltage to turn on the alternator. Without it the alternator becomes a very expensive idler pulley.
Lead Driver
Joined: Jun 2021
Posts: 5,219
Likes: 804
Thread
Thread Starter
Forum
Replies
Last Post
GasGuzler
1987 - 1996 F150 & Larger F-Series Trucks
19
Mar 18, 2024 07:47 AM
CharlsChainCharlson
1973 - 1979 F-100 & Larger F-Series Trucks
17
May 18, 2016 06:51 PM
usmccorrections
1987 - 1996 F150 & Larger F-Series Trucks
10
Jan 30, 2004 05:15 AM
