Table 4-2. Unit Troubleshooting-continued -706880221

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

"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).

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).

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.

Step 2. Check output of regulator/alternator.

Replace regulator/alternator (see para 4-133).

4-92