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Page Title: "PUMP IN GEAR" LIGHT ILLUMINATES, BUT PUMP DOES NOT ENGAGE
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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 29 "PUMP IN GEAR" LIGHT ILLUMINATES, BUT PUMP DOES NOT ENGAGE (Refer to Electrical Wiring Diagrams, Appendix H, Sheet 3 of 16.) Step 1. Check solenoid actuated transmission locking valves for proper operation. Replace valves (see para 4-9.4). Step 2. Check wiring for continuity. Replace wire (see para 4-9.4). 30 LOW FRONT AND REAR AIR LIGHTS DO NOT ILLUMINATE/FLASH WITH LOW AIR PRESSURE INDICATED ON GAUGES (Refer to Electrical Wiring Diagrams, Appendix H, Sheet 2 of 16.) Step 1. Check light. Replace light (see para 4-9.4). Step 2. Check flasher unit. Replace flasher unit (see para 4-9.4). Step 3. Check PSI switch for proper operation. Replace switch (see para 4-9.4). Step 4. Check for +12V at circuit breaker #1 on ignition accessory buss. Replace breaker (see para 4-99). Step 5. Check wiring for continuity. Replace wire (see para 4-9.4). 31 LOW VOLTAGE LIGHT STAYS ON (Refer to Electrical Wiring Diagrams, Appendix H, Sheet 3 of 16.) Step 1. Check batteries properly hold charge. Replace batteries. (see para 4-114). Step 2. Check output of regulator/alternator. Replace regulator/alternator (see para 4-133). 4-92

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