Battery light...
Thread Starter
|
New User
Joined: Nov 2005
Posts: 16
Likes: 0
Battery light...
Need some help... My alternator and battery stopped working on my 2002 F-250 SD (gas) and I replaced both, but can't seem to get the battery light on my instrument panel to turn off (stays lit). It starts and runs good. Does anyone have any ideas as to why? Thanks.
Fleet Mechanic
Joined: Aug 2005
Posts: 1,339
Likes: 5
From: NJ
Originally Posted by sltrrco
you need to reset the computer.
Next unplug the harness connector to the voltage regulator (on the alternator) Test for power on the yellow wire. If no power check for a broken wire or blown fuse. Now with the key turned on check for 2 volts or greater on the green wire, if no voltage trace that wire back to the inst. cluster (it comes from the battery light)
If all the wiring tests good then you have a dud alternator.
Most fords have the wire colors that I listed above, however some are different. If they are not the same colors they should still test the same. If this alternator has a 3 wire and a one wire plug, ignore the center and test the 2 outside's, the center wire just jumps to the 1 wire plug.
Lead Driver
Joined: May 2003
Posts: 9,303
Likes: 48
From: Lyndonville, Vermont
14.5volts at idle Alt charging voltage with fully charged battery. Good battery key off 12.5 volts. The light comes on because it isn't seeing charging voltage. If its charging then as said above you have a small wire thats not making it to the dash.
Dick
Dick
Elder User
Joined: Jun 2005
Posts: 645
Likes: 2
My alternator and battery stopped working on my 2002 F-250 SD (gas) and I replaced both,
Trending Topics
Lead Driver
Joined: May 2003
Posts: 9,303
Likes: 48
From: Lyndonville, Vermont
In reality I think thats a bunch of bull. I can't tell you how many times I have run my bartteries down to nothing by accident or on purpose and jumped it and drove away and never killed an alt. Plus the SD alts are heavy duty its not gonna hurt them unless there's something wrong with it to start with. On some vehicles that may be the case cause the alts are sized too small.
Dick
Dick
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
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
Thread Starter
|
New User
Joined: Nov 2005
Posts: 16
Likes: 0
alternator...
okay... well all wiring seems fine, got a reman. alt. They gave me 110 amp? My new battery shows 12.8v and 13.4v w/ alt. charging, remains 13.4v w/all power on also. Lighting pulsating lightly in sequence w/ humming/ light squeel alternator (louder w/ more drawing off) Bad alt/ volt reg.?
Thread Starter
|
New User
Joined: Nov 2005
Posts: 16
Likes: 0
So it sounds like a bad alt? Nothing new has been placed to draw more, ideas for bigger amp alt? This 110 was all that matched @ parts store. Had to order that one. Since when did F250 alts. become so uncommon?
Lead Driver
Joined: May 2003
Posts: 9,303
Likes: 48
From: Lyndonville, Vermont
I think the 130 amp is prob more common. Some brands of remans are total junk.
It shouldn't pulsate and it should put out 14.5 volts. I'm a little hesitant cause I'm wondering why your original went bad....or did it. Don't know what to tell you. Sounds like that alt is junk.
Dick
It shouldn't pulsate and it should put out 14.5 volts. I'm a little hesitant cause I'm wondering why your original went bad....or did it. Don't know what to tell you. Sounds like that alt is junk.
Dick
Lead Driver
Joined: May 2003
Posts: 9,303
Likes: 48
From: Lyndonville, Vermont
Lead Driver
Joined: May 2003
Posts: 9,303
Likes: 48
From: Lyndonville, Vermont
Looks like maybe the only alt for that year is the 110 amp.. Unless
http://www.pa-performance.com/displa...,cR@categories
Its a 6G
Dick
http://www.pa-performance.com/displa...,cR@categories
Its a 6G
Dick
Last edited by 99f350sd; Jan 15, 2006 at 01:32 PM.