check charging system?

[draycooper]

I have a 2005 explorer. The "Check Charging System" message is on. The battery checks at 12.6 volts when engine is off. I have been driving it for three days so apparently my alternator is charging. Is there anything else in charging system to look at. Thanks for any suggestions. This is a very informative site.

 

[Number4]

The light is controlled by the PCM, which gets its signal from the plastic connector at the alternator.

I'd start with inspecting the connector and having a load test performed on the battery.

 

[dla]

Get a $10 DVM at Harbor Freight. The battery should read ~14 volts when the engine is idling after you first start it. If it is still at 12.6v then the alternator is likely bad.

 

[TechGuru]

Get a $10 DVM at Harbor Freight. The battery should read ~14 volts when the engine is idling after you first start it. If it is still at 12.6v then the alternator is likely bad.

Not even that much: http://www.harborfreight.com/7-function-multimeter-98025.html

 

[Number4]

Seriously people, have some self respect:

http://m.sears.com/craftsman-multimeter-digital-with-8-functions-and-20/p-03482141000P

Better:
http://m.sears.com/craftsman-digital-multimeter-with-ac-voltage-detector/p-03482146000P

I have a crap load of HF tools, but some times you need an upgrade.

 

[TechGuru]

Seriously people, have some self respect:

http://m.sears.com/craftsman-multimeter-digital-with-8-functions-and-20/p-03482141000P

Better:
http://m.sears.com/craftsman-digital-multimeter-with-ac-voltage-detector/p-03482146000P

I have a crap load of HF tools, but some times you need an upgrade.

LOL, I don't use those. Mine has Duty-Cycle which I need for working on some older pre-OBDII cars.

I'm sure those Craftsman's are made in china too. If you want a real meter you have to get a Fluke.