Mechanics

CHARGING SYSTEM

2003 Ford Ranger

Electrical problem
2003 Ford Ranger 6 cyl Two Wheel Drive Automatic 75000 miles

I have an o3 ranger 4.0 that does not charge. The alternator checks out and I ran a test by grounding out the f terminal on the regulator jumpering the a term and read voltage acroos the a and s terminal connector and I had.5 on s and nothing on a
can you point me in the right direction to try next?
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Randyrjohnson2002
February 5, 2009.




1.Measure voltage between ground and generator terminal B+ (Black/Orange wire)


http://www.2carpros.com/forum/automotive_pictures/99387_Graphic1_185.jpg



. If battery voltage is present, go to next step. If battery voltage is not present, repair open in Black/Orange wire between generator and battery junction box.
2.Disconnect generator 3-pin harness connector. Measure voltage between ground and generator harness connector terminal "A" (Yellow/White wire). If battery voltage is present, go to next step. If battery voltage is not present, repair circuit between battery and generator.

3.Turn ignition on. Measure voltage between ground and generator harness connector terminal "I" (Light Green/Red wire). If voltage is equal to battery voltage, go to next step. If voltage is not equal to battery voltage, repair open in Light Green/Red wire between generator connector and instrument cluster.

4.Connect generator 3-pin harness connector. Start engine and let idle. Measure voltage between positive battery terminal and generator terminal B+ (Black/Orange wire). If voltage drop is less than 0.5 volt, replace generator. If voltage drop is 0.5 volt or more, repair circuit between generator and battery.


http://www.2carpros.com/forum/automotive_pictures/99387_Graphic2_90.jpg



http://www.2carpros.com/forum/automotive_pictures/99387_Graphic3_43.jpg


BMRFIXIT
Feb 5, 2009.


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