There is a fusible link on the starter solenoid.
When the engine is running, the generator turn-on signal is sent to the generator from the PCM, turning on the regulator.
If while the engine is running at 2,000 rpm's, the charging voltage at the battery positive post is only twelve volts but at the back of the alternator B+ terminal it is 14 volts, then yes, I would say that fusible link may be bad.
If not, make sure that wire from the PCM is hot with engine running, the smaller gauge red wire to b of alternator and also check that D-orange wire is hot all the time with twelve volts.
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Wednesday, January 20th, 2021 AT 7:35 PM
(Merged)