aston_jag_tech
11-03-2007, 11:37 PM
I wanted to share an issue with my less than efficient charging system...
Intermittently the "Bat" and "Park Brake" Illuminated at first start up and would shut off after I passed 3000RPM.
Intermittently the "Check Engine" illuminated and then shut off with no issues. This happened rarely at first but then more often closer to complete failure.
Intermittently the car stalled while in traffic. Happened once day before complete failure. Restarted with no issue. No warning lights.
Intermittently the "ABS" light came on. Exterior lights on. Audio Head Unit shut completely down and would not power up. "Check Engine" on and flashing(I counted a 21 code), turning the exterior lights off, "Check Engine" shut off and Audio Head Unit powered up.
Shut off car and accessories. Attempted to turn engine over, slow crank no start. Complete failure.
Diagnosis-
-Charged battery for 1 hour, test battery ok, passed at 12.54v. Started engine and checked charging output to battery at battery terminals-11.20v.
-Checked charging output at alternator 11.20v.
-Replaced alternator volt. reg.(included brushes)
-Continuity test of Stator-OK.
-Visual inspection of rotor-OK, contact points for brushes is worn.
Install-
Reinstalled, check output at alternator. 14.40v
Hope this helps anyone diagnosing electrical issues.
-Scott Garven
Intermittently the "Bat" and "Park Brake" Illuminated at first start up and would shut off after I passed 3000RPM.
Intermittently the "Check Engine" illuminated and then shut off with no issues. This happened rarely at first but then more often closer to complete failure.
Intermittently the car stalled while in traffic. Happened once day before complete failure. Restarted with no issue. No warning lights.
Intermittently the "ABS" light came on. Exterior lights on. Audio Head Unit shut completely down and would not power up. "Check Engine" on and flashing(I counted a 21 code), turning the exterior lights off, "Check Engine" shut off and Audio Head Unit powered up.
Shut off car and accessories. Attempted to turn engine over, slow crank no start. Complete failure.
Diagnosis-
-Charged battery for 1 hour, test battery ok, passed at 12.54v. Started engine and checked charging output to battery at battery terminals-11.20v.
-Checked charging output at alternator 11.20v.
-Replaced alternator volt. reg.(included brushes)
-Continuity test of Stator-OK.
-Visual inspection of rotor-OK, contact points for brushes is worn.
Install-
Reinstalled, check output at alternator. 14.40v
Hope this helps anyone diagnosing electrical issues.
-Scott Garven