D21FJ60
#LiveLaughLove.
Need some basic info. Let's do some voltage checks. Keep everything connected, no need to disconnect anything. Turn off all loads (headlights, blowers, etc.). Take voltage measurements at the battery posts not the clamps.
Step A: What is the battery voltage with the engine off? Should be about 12.5 +/-
Step B: What is the battery voltage with the engine running? After starting the engine let it run for a few minutes so the battery can recharge from the starting current drain before measuring the voltage. Should be about 14 +/-
Step C: What is the output voltage of the alternator? Measure positive at the output terminal and negative at the alternator housing. Typical is about 14.2 volts.
Step D: Measure the voltage between the battery negative post and the alternator housing. This will detect bad grounds between the alternator and battery. Should be a fraction of a volt.
Step E: Measure the voltage between the alternator positive output and the battery positive post. This will detect bad wiring between the battery and alternator. Should be a fraction of a volt.
Step F: If you have an external voltage regulator, measure the voltage between the alternator housing and the regulator housing/ground. This will detect bad grounds between the alternator & regulator. Should be a fraction of a volt.
Step G: Measure the voltage between the regulator housing/ground and the battery negative post. This will detect bad grounds between the regulator & battery. Should be a fraction of a volt.
Let me know what you get and then we can move on to the next step.
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You are awesome. Sorry I didn't provide an update- I drove the car about 50 miles yesterday and never had any problems. After the first 15 I checked and engine voltage at idle no loads was about 13.6v. Wondering if the battery being low affected the readings when I first fired it up and saw it drop?