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The charge indicator bulb is powered by an underdash fusebox fuse. The bulb is grounded by the alternator.
Disconnect the alternator 4-pin connector. Turn ignition key on; engine not running. Voltage test pin 3 of the connector. It is a white/red wire according to my '95 service manual. You should get battery voltage. If you have no voltage; check for open wiring from fuse to bulb to alternator. Check for a blown bulb in the charge warning lamp gauge.
If you have battery voltage, check for a faulty alternator ground wire.
Normally you can bypass the charge warning circuit by simply revving the engine up above 2500rpm. This will be sufficient to energize the alternator field coil and the alternator should continue to charge until the engine is shut down.
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