Mechanics

BATTERY KEEPS GOING DEAD IF CAR NOT RUN FOR

1999 Saturn SC2

Electrical problem
1999 Saturn SC2 4 cyl Two Wheel Drive Automatic

SOMETHING IS DRAINING DOWN BATTERY-TAKES A COUPLE OF DAYS WITHOUT RUNNING AND ITS DEAD- HAVE REPLACED BATTERY AND RETURNED NEW ONE IT TO WALLY WORLD TWICE- THEY CHECK AND SAY ITS OK- HAVE REMOVED TRUNK LIGHT BULB- DOORLOCK RELAYS IN INSIDE FUSEBOX ALSO RADIO FUSE TO TRY TO NARROW DOWN THE DRAW BUT NO LUCK-
THANKS
AD
Avatar
Don bess
January 3, 2010.




Need to have BATTERY DRAIN TEST
many ways to do it this is one

NOTE: Amperage draw will vary from vehicle to vehicle depending on equipment package.
No production vehicle should have more than a 50 mA (0.050 amp) draw.
BATTERY DRAIN TEST
1. Ensure junction box/fuse panels are accessible without turning on interior and hood lights. Drive vehicle over 30 MPH for at least 5 minutes. Park vehicle and allow to sit with ignition off for at least 40 minutes to allow electronic modules to power down.

2. Connect a fused jumper wire between negative battery cable and negative battery post. Disconnect negative battery cable from negative battery post, without breaking the jumper wire connection to prevent modules from resetting.

NOTE: It is very important that continuity is not broken between negative battery post and negative battery cable when disconnecting battery cable or connecting ammeter. If continuity is broken, go to step 1.
3. Ensure ammeter is set to read milliamps with at least a 10 amp capability. Connect ammeter between negative battery cable and negative battery post. Remove fused jumper wire.

4. If excessive current draw is present (50 mA or more), pull fuses from battery/central junction box one at a time and note any current drop when each fuse is removed.
AD

BMRFIXIT
Jan 3, 2010.
Check the alternator. If there is not enoph return going to the battery, this can cause excessive drain on the battery. Even when it has not been driven for awhile.

Tiny
1999SaturnSC2
Aug 5, 2010.

AD