Sounds to me you have high resistance problem , Main power feed to the alternator . Check the power junction block behind the brake booster on the fire wall . There is nothing in the instrument cluster to regulate voltage .B+ voltage to battery symbol when key is on , then when it starts voltage from voltage regulator inside alternator goes back on that circuit shutting off the light . Voltage on both sides of the light cancel's each other out . Yes, i would look for a burnt connector . at the junction block . Do a voltage drop test while the vehicle is running . Voltage Drop Testing the Charging System
SOURCE: alternator not exciting
Hi ' If you changed the battery and alternator,
Check the voltage at the red wire on the alternator. if there a less than 12 volt.
Check the fuse link, that goes in the starter positive bolt.
If the fuse is bad replace and recheck the charging system.
IF charging normal. good.
If not, che the fuse in the fuse box, "" cluster".
If the fuse is blow out, replace. and check again.
OK. I hope this work for you.
SOURCE: Intermittent Charging Problem. I posted a
When you wire it in, run a hot wire directly from the battery to the volt meter (this will give you a more accurate reading) The instructions will come with the volt meter on how to wire it. Just make sure about the hot wire coming directly from the battery.
What I would do first is take off the alternator and go to a parts store and have them test it for free. This will save any additional purchases. Good Luck.
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