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TM 5-4210-233-14&P-1
Table 4-2. Unit Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ELECTRICAL SYSTEM - CAB CONTROLS AND INDICATORS - Continued
43
CAB SPEEDOMETER DOES NOT INDICATE VEHICLE SPEED
(Refer to Electrical Wiring Diagrams, Appendix H, Sheet 2 of 16.)
Step 1.
Check gauge.
Replace gauge (see para 4-93).
Step 2.
Check for +12V at circuit breaker #1 on ignition accessory buss.
Replace breaker (see para 4-99).
Step 3.
Check wiring from pulse generator to gauge for continuity.
Replace wire (see para 4-9.4).
Step 4.
Check pulse generator (sender) for proper operation.
Replace pulse generator (see para 4-9.4).
ELECTRICAL SYSTEM - EMERGENCY MASTER CIRCUITS
1.
EMERGENCY MASTER SWITCH DOES NOT ENERGIZE EMERGENCY EQUIPMENT
(Refer to Electrical Wiring Diagrams, Appendix H, Sheet 3 of 16.)
Step 1.
Check switch.
Replace switch (see para 4-94).
Step 2.
Check emergency master solenoid for proper operation.
Replace solenoid (see para 4-9.4).
Step 3.
Check for +12V at circuit breaker #9 on battery accessory buss.
Replace breaker (see para 4-99).
Step 4.
Check wiring for continuity.
Replace wire (see para 4-9.4).
4-99
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