1996 Geo Metro No charging whatsoever

CHRISW

MEMBER
1996 GEO METRO
4 CYL
FWD
AUTOMATIC
127,000 MILES

I recently had problems with my geo metro involving the charging of the battery. We thought at first it was the alternator which caused me to go out and buy a new one and put it on and it has a good battery in it (New) and it still isnt charging. I replaced the terminals and still no charge. What could be wrong with it now?

1 Reply

BMRFIXIT

MECHANIC
19,053 POSTS

1. Test battery and check generator belt tension. Visually inspect related wiring connections. Turn ignition switch to OFF position. Disconnect negative battery cable. Disconnect generator output wire from terminal "B" (Black wire). Using an ammeter, connect positive lead to terminal "B" (Black wire) and negative lead to disconnected generator output wire.

2. Using a voltmeter, connect positive lead to generator terminal "B" and negative lead to ground. Connect negative battery cable. Start engine. Turn headlights on high beam and heater blower switch to HIGH position. Using a screwdriver, ground generator terminal "F". Increase engine speed to 2000 RPM and note maximum current output on ammeter.

3. If maximum current output is within about 10 amps of rated amp output (55 amps) and voltmeter reading is 13.5-16.0 volts, generator is okay. If maximum current output is not within 10 amps of rated amp output and/or voltmeter reading is less than 13.5 volts, repair or replace generator.