Dashboard Alternator light
Hi all, The MPPT controller on my coach will deliver 14.6 volts in bulk mode which is fine. In fact it’s exactly what the specs on my GC2 house batteries call for. But when I turn on the engine and...
Forum Discussion
BFL13 wrote:
Suspect it is the light circuit getting grounded ( he says, "earthed") when solar comes on or getting a high resistance from the solar coming on, which will make the dash light come on it says here:
https://www.howacarworks.com/ignition-system/troubleshooting-the-ignition-warning-light
That diagram is OUTDATED by at least 20 years! No cars work that way any more.
The PCM tell the alternator/regulator to raise or lower the voltage. If the desired voltage can not be achieved, the PCM sends a message to the cluster to turn on the light.
