Try this simple test first. To make sure alternator is charging the battery. If alternator is charging then we will need to trace what is draining the battery. Something left on? Radio/interior/exterior lights. Etc. Etc.
CHARGING SYSTEM TESTING
NOTE:Ensure that battery is fully charged and battery connections are clean and secure. Check that alternator drive belt is adjusted to proper tension.
NOTE:When charging battery, remove ground cable before connecting charger. If booster battery is used to start engine, negative cable of booster must be connected to vehicle frame. Disconnect negative booster cable first.
Ensure that all accessories are turned off. Connect voltmeter to battery. Attach tachometer and start engine. Operate at 1500 RPM with no electrical load. Voltmeter reading should increase, but it should not exceed 2 volts above battery voltage. Reading should be taken when voltmeter stabilizes.
With engine operating, turn heater or A/C blower motor to HIGH position. Turn on headlights to high beam. Increase engine speed to 2000 RPM. Voltmeter should indicate a minimum of.5 volt above battery voltage.
Saturday, November 22nd, 2008 AT 9:16 AM