Yes, it could be battery/charging system. You can check both with a volt meter as follows:
Charging system: With engine running all accessories off, test accross both battery terminals. The voltage should be between 14 & 15.5 volts. If the voltage is outside of this range, alternator is bad.
Battery: Engine off, volt meter, again, on battery terminals. Crank engine. Voltage should not drop below 12 volts. If engine starts too soon the get an accurate reading you may have to pull the fuel pump relay so it won't start and cranks longer. Let me know.
Thursday, December 4th, 2008 AT 10:15 AM