CHARGING SYSTEM LIGHT

  • Tiny
  • Dk78kk
  • FORD EXPEDITION

I have 2004 ford expedition 71000 miles, 5.4 engine. The check charging system light came on. Had it check at my parts store. Alternator was not charging, had it rebuilt by a local rebuild shop(good record), cleaned bat. Terminals, and load tested battery, all good. But the Light is still on and I have 14.5 volts with engine running. Any Idea's?

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Saturday, August 18th, 2007 AT 3:10 PM

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  • Tiny
  • Jet243
  • MEMBER

I have the same problem on my 2003 ford expedition I changed battery and alternator and battery/check charging system light will not turn off. I also verified the charger was charging the battery and the fuse was good. I could not find a manual. Does anybody know or have a wiring diagram that can tell me where the cable from the battery to the alternator splits off to and how it works with the fusible link(s)?

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Friday, September 7th, 2007 AT 12:03 AM
  • Tiny
  • Jw6937
  • MEMBER

I have the exact same problem. 2003 Expedition with about 71k miles on it. Alternator just went out on it. Replaced it with a new one, but the red battery dummy light stays on, & the message center is still showing the "Check Charging System" message? Tried installing a 2nd new alternator just in case, but the "Check Charging System" message is still there. Tested the output on the alternator & everything test perfectly. But no matter what I try, that darn "Check Charging System" message won't go away. Has anyone determined a fix to this issue yet?

FROM KEN: Check the solution below

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Saturday, October 13th, 2007 AT 2:55 PM
  • Tiny
  • Manuelxp@adelphia.net
  • MEMBER

I have the same problem but it is one step further, I am on my second alternator they ran a test of the first one and it wast fine but like I told them with it not carrying a load it could test good all day replaced it now the light is still on but engine dies right after it is jumped I did test battery low but still good. The vehicle does not hold the charge Does anyone know what fuses I should be looking at?

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Monday, October 15th, 2007 AT 9:08 PM
  • Tiny
  • 2CarPros Ken
  • ADMIN
  • 4,158 POSTS

Hello Dk78kk,

It looks like the problem is the PCM or you have high resistance or a broken fusible link, here is a diagram below.

Please let us know what you find so it will help others.

Best, Ken

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Tuesday, November 29th, 2016 AT 2:59 PM

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