Make sure the battery has a full charge. Use a digital multimeter across the battery posts, engine and everything off. A fully charged battery should read over 12 volts. Next, start the vehicle, take second reading across battery posts, engine running, the second reading should be higher than the first if the charging system is working.
Also check for voltage at the alternator bat terminal, everything off, it should read battery voltage at that terminal. You may need to check fusible link? Could be a problem with wiring circuit to or from the alternator, if the charging system isn't working.
Tuesday, June 11th, 2013 AT 1:55 PM