Sensing Circuit - Mercury 150 EFI Service Manual

Sensing Circuit

1. Unplug RED and PURPLE lead connector from alternator.
2. Connect POSITIVE (+) voltmeter lead to RED lead and NEGATIVE (–) voltmeter lead
to ground.
3. Voltmeter should indicate battery voltage. If correct voltage is not present, check
sensing circuit (RED lead) for loose or dirty connections or damaged wiring.
a -
90-883728 JULY 2001
Sense Lead (RED)
CHARGING & STARTING SYSTEM
a
58726
Page 2B-15