anyone know how to fix one chargeing system

1991 DODGE DAKOTA
164,000 MILES
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HUEY777
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does not charge have 12 volts running to alt have power running out of alt help please
Mar 18, 2012 at 12:29 AM
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RASMATAZ
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-If I were you have load tested at an auto parts store such as NAPA to check its condition-start here
Mar 18, 2012 at 12:39 AM
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HUEY777
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new bat and new alt are in truck replaced when it started this put brand new parts in still doing same thang
Mar 18, 2012 at 1:12 AM
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RASMATAZ
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INITIAL CHECKS
Before proceeding with charging system diagnosis, ensure:
Battery is fully charged and in good condition
Battery cables are in good condition with connections clean and secure
Alternator belt is in good condition and properly tightened
Alternator and SBEC wiring harness connections are clean and tight.
Engine ground strap is in place
UNSTEADY OR LOW CHARGING
Check for loose alternator belt, charging resistance too high, defective alternator, loose alternator ground wire or corroded battery terminals.

Chedck and test the fusible link and the dark blue at the alternator for battery voltage coming from the ignition switch
Mar 18, 2012 at 1:41 AM
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HUEY777
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have power coming from blue and green wires and power from bat have checked grounds have checked and reconceted computer have power just not charging
Mar 18, 2012 at 7:45 PM
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RASMATAZ
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What do you have on the dark green wire?
Mar 18, 2012 at 7:56 PM
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HUEY777
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11.34
Mar 18, 2012 at 8:00 PM
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RASMATAZ
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Do this get a multimeter read the battery voltage before you start the vehicle-record it, now start it up and read the voltage again-let me know the readings
Mar 18, 2012 at 8:18 PM
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HUEY777
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before start 12.14 when running green wire 11.09 blue 11.37 batt went to 11.70
Mar 18, 2012 at 8:44 PM
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RASMATAZ
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Its not charging-have the alternator load tested
Mar 18, 2012 at 9:18 PM
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HUEY777
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alt tested good
Mar 22, 2012 at 5:42 PM
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RASMATAZ
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If it checks out-you have a wiring problem I've given you all I got, this is as far I'm gonna take you-sorry
Mar 22, 2012 at 10:03 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.