"Check charging system" warning light
Thread Starter
Junior Member
Joined: Mar 2010
Posts: 7
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"Check charging system" warning light
I have a 2005 F-150 and today the "check charging system" light came on intermitently. Two hours later my battery was completely dead. I put a new battery in and I am still getting the same warning light. There is nothing in the owners manual about that warning light. Where should I start looking to figure this out?
Ford Test Driver
Joined: Jan 2010
Posts: 253
Likes: 2
From: Detroit, MI
Alternator is out 
. If you wanna check it put a voltmeter to your battery while the engine is running. Should be at 14 volts anything lower is more then likely a bad alternator. I am pretty sure that your local auto zone or murrays will test your old one for free. If it was me I would buy the one with a lifetime warranty if you plan on keeping the truck for a little while.
...................just my .02
. If you wanna check it put a voltmeter to your battery while the engine is running. Should be at 14 volts anything lower is more then likely a bad alternator. I am pretty sure that your local auto zone or murrays will test your old one for free. If it was me I would buy the one with a lifetime warranty if you plan on keeping the truck for a little while....................just my .02
Last edited by 02Screw; Mar 25, 2010 at 10:23 PM.
