Battery Drain
Thread Starter
|
Cross-Country
Joined: Sep 2003
Posts: 68
Likes: 0
From: CENTRAL PA
Battery Drain
Hi Everyone, I have a 1995 f-350 460. My battery is draining over night enough to crank very slow. Battery voltage reads over 14 volts with engine running. I disconnected negative cable and at first used a test light from post to cable end and it lights up. I then used a voltmeter from negative post to cable and it reads over 12 volts. I pulled every fuse in dash and under hood and volt meter still reads over 12 volts. I changed solenoid on firewall and it made no difference. Any suggestions would be very appreciated, Thanks
Thread Starter
|
Cross-Country
Joined: Sep 2003
Posts: 68
Likes: 0
From: CENTRAL PA
Just unplugged alternator and it made no difference. 12.46 volts between neg. battery post and disconnected cable. I'm starting to wonder if it could be in the ignition switch. Is there a plug that I can just disconnect to check?
Fleet Mechanic
Joined: Feb 2007
Posts: 1,652
Likes: 79
From: Mooresville, NC
Likely culprits:
--Two "powered all the time" circuits are your Ignition Switch and Main Light Switch
-- The Alternator Circuit and Battery are connected on the hot side of the starter relay.
PowerProbe would be handy to use if you can get one..........the inductive "current" readers with directional arrows (indicating location of short, draw, etc) can help too
--Two "powered all the time" circuits are your Ignition Switch and Main Light Switch
-- The Alternator Circuit and Battery are connected on the hot side of the starter relay.
PowerProbe would be handy to use if you can get one..........the inductive "current" readers with directional arrows (indicating location of short, draw, etc) can help too
Trending Topics
Thread Starter
|
Cross-Country
Joined: Sep 2003
Posts: 68
Likes: 0
From: CENTRAL PA
Thanks for all the help. I believe I found the problem. My truck is a dump truck and has a bed up switch. I didn't think it worked or was still powered. Disconnected the switch and wire to the switch. I also put a fuse in my ammeter and checked for the drain. I now get a reading of 0.00 with door closed and 2.4 with my door open. I thought I should show slight drain of under .05, but seems like I've got it fixed. thanks
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
Thread
Thread Starter
Forum
Replies
Last Post
msteelsos
1973 - 1979 F-100 & Larger F-Series Trucks
7
Jan 3, 2011 03:39 PM