CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONS
TM 9-2350-256-20
2-19 ELECTRICAL TROUBLESHOOTING-Continued
MASTER RELAY SYSTEM AND SLAVE RECEPTACLE-Continued
WARNING
Remove all jewelry such as rings, dog tags,
bracelets, etc. If jewelry contacts a metal
surface a direct short may result in instant
heating of tools, damage to equipment,
and injury or death to personnel.
G
Reconnect wire 400 to bulkhead side of 30 A circuit
breaker. Disconnect wire 400 from battery side of 30 A
circuit breaker. Place red lead of multimeter in wire
400 and black lead to ground. Turn MASTER switch
on and check for voltage. Turn MASTER switch off. If
voltage is present, replace 30 A circuit breaker. If
voltage is not present, troubleshoot battery circuit.
H
Close air inlet doors (TM 9-2350-256-10). Raise boom
(TM 9-2350-256-10). Open air inlet doors. Place red
lead of multimeter on wire 49 at positive terminal and
black lead to ground. Turn MASTER switch on and
check for voltage. Turn MASTER switch OFF. If
voltage is present, go to step I. If voltage is not
present, replace/repair wire 49 of batteries to master
relay, voltage regulators, slave receptacle, and engine
disconnect wiring harness (see paragraph 6-41 for dual
voltage; 6-42 for single voltage).
I
Place red lead of multimeter on wire 50 at negative
terminal and black lead to ground. Check for
continuity. If continuity is present, replace rear slave
receptacle (see paragraph 6-77). If continuity is not
present, replace/repair bulkhead rear slave receptacle
wiring harness (see paragraph 6-77).
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