PDA

View Full Version : Mazda MPV Charging system


Scagman
Oct 10, 2007, 02:13 PM
I have a 1990 MPV, the voltage regulator failed (which meant a new alternator). After renewing alternator the battery failed, renewed it. NOW after starting the engine the alternator charges 14.5 volts for a few minutes then quits charging (12 volts). The alternator will begin charging after an hour or two of shutdown, and then for only a few minutes. Incidentally the charging light does not illuminate on the dashboard. Before I buy another alternator and go through the nightmare of renewing it has anyone got an idea of what's wrong?

Thanks,
Rutledge, TN

TxGreaseMonkey
Oct 10, 2007, 05:36 PM
The problem may reside with the ECM. You may want to get it diagnosed or substitute a known-good ECM.