There's gotta be some junctions somewhere that feed the light switch and the ignition switch, both of which will have a link to the neg side of the ammeter and are hot all the time.
Caution: if you're going to use a VOM on a resistance scale, disconnect the pos. side of the battery. You don't want any voltage present when reading resistance - best case is faulty readings, worse case is a quick funeral for your meter.
