Precautions; General; Electronic Diesel Injection (Edi) Electrical System Precautions - Mercury MerCruiser D2.8L D-Tronic Service Manual

CHARGING SYSTEM

Precautions

General

The following precautions MUST BE observed when working on the charging
system. Failure to observe these precautions may result in serious damage to the
alternator or charging system.
wDo NOT attempt to polarize the alternator.
wDo NOT short across or ground any of the terminals on the alternator, except as
specifically instructed in the Troubleshooting Tests.
wNEVER disconnect the alternator output lead or battery cables when the alterna-
tor is operating
wNEVER disconnect regulator lead from alternator regulator terminal when the al-
ternator is operating.
wALWAYS remove negative (–) battery cable from battery before working on the
charging system.
wWhen installing battery, connect battery cables to battery by FIRST installing
positive (+) battery cable end on positive (+) battery terminal. Tighten clamp se-
curely. THEN install negative (-) battery cable end on negative (-) battery termi-
nal. Tighten clamp securely
wIf a charger or booster battery is to be used, connect it in parallel with existing
battery (positive to positive; negative to negative).

Electronic Diesel Injection (EDI) Electrical System Precautions

Avoid damage to the EDI electrical system and components. Refer to the following
precautions when working on or around the EDI electrical harness or when adding
other electrical accessories:
• Do NOT tap accessories into engine harness.
• Do NOT puncture wires for testing (Probing).
• Do NOT reverse battery leads.
• Do NOT splice wires into harness.
• Do NOT attempt diagnostics without proper, approved Service Tools.
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CAUTION
CAUTION
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002