(1) Remove 15 screws and two ECB
(2) Set multimeter select switch to
(3) Connect positive (+) multimeter lead
to wire 1712 at circuit breaker CB7.
(4) Connect negative () multimeter lead
to a known good ground.
(5) Turn ON ENGINE switch
(a) If 10 to 14 vdc are not present,
turn OFF ENGINE switch
and replace circuit
breaker CB7 (Para 7-16).
(b) If 10 to 14 vdc are present,
circuit breaker CB7 is OK.
(6) Turn OFF ENGINE switch.
Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry or tools contact positive electrical
circuits, a direct short may result. Damage to equipment, injury or death to personnel may occur.
Circuit breakers CB5, CB6, CB12, CB20, CB22, CB23 and relays R3, R13 - R19, R26, R28, R32, R33
are always electrically hot and can cause severe injury to personnel. Care must be exercised when
working under the electrical circuit board cover.