Alternator System Circuitry Test; Output Circuit - Mercury 150 EFI Service Manual

CHARGING & STARTING SYSTEM

Alternator System Circuitry Test

Using a 0-20 volt DC voltmeter, perform the following tests:

Output Circuit

1. Connect POSITIVE (+) voltmeter lead to alternator terminal B (output terminal). Con-
nect NEGATIVE (–) lead to case ground on alternator.
2. Shake alternator wiring harness. Meter should indicate battery voltage and should not
vary. If proper reading is not obtained, check for loose or dirty connections or dam-
aged wiring.
a -
Page 2B-14
Terminal B
a
58883
90-883728 JULY 2001