Question about 2005 Ford Five Hundred
Battery light is on and says check charging system, been three years now?
Posted by Anonymous on
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Posted on Jan 02, 2017
Check all fuses, both inside and outside. Use a volt meter to check the output of the alt., by setting the meter to D/C/ volts, put the black wire on battery GROUND and the red wire on the big terminal of the alt.,,, which the wire is held on with a nut and washer, or a lock nut.If your reading is around 12.0 - 12.6,,, try another alt....
If the reading is 13.8 - 14.6 ,, you have a problem between the alt and the battery.
Hope this helps.
Posted on Jul 27, 2009
if the car is charging and you have power and ground to the alternator and in the plug then the alternator needs the rectifier either resoldierd at the stator connections or it needs to be replaced.
Posted on Sep 24, 2009
if charging light is on w/ engine running,the fault could be the alternator or another component of the charging system.remove, clean and tighten battery post connections to check for alternator output,use a volt meter or multi-tester set to 50 Volts DC,w/ tester on battery terminals it should read 12 volts W/ engine off;13 to 14 volts w/engine running.if voltage increases when alternator is spinning,suspect battery
Posted on Sep 28, 2009
Its probably the alternator. It will need to be tested on the vehicle with the engine running and the light illuminated. Measure the battery voltage with the engine running. It should be at least 13.5 volts. If it is lower have the alternator tested at a shop with a charging system tester.
Posted on Feb 27, 2010
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