Mercury Optimax Models 135, 150, Direct Fuel Injection., Page 86Get this manual

Mercury Optimax Models 135, 150, Direct Fuel Injection., Page 86

CHARGINGSTARTING SYSTEM
Alternator System Circuitry Test
Using 0-20 volt DC voltmeter, perform the following tests:

Output Circuit
1Connect POSITIVE (+) voltmeter lead to alternator terminal (output terminal)Connect NEGATIVE () lead to case ground on alternator2Shake alternator wiring harnessMeter should indicate battery voltage and should not varyIf proper reading is not obtained, check for loose or dirty connections or damaged wiring
20 1015 30 0610OHMS 200 30 20 40 15 10 10 20 00 VOLTS 10 DC AMPS

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