SENDING UNITS AND WARNING SWITCHES TROUBLESHOOTING AND MAINTENANCE PROCEDURES.
TEST OR INSPECTION
ENGINE OIL PRESSURE SWITCH DOES NOT OPERATE.
Step 1. Check oil level in engine (Figure 7-136).
Step 2. Start engine and run for several minutes. Check oil pressure on oil pressure gage.
If the oil pressure is within operating range--replace engine oil pressure switch. Refer to paragraph 7-92.
COOLANT TEMPERATURE SWITCH DOES NOT OPERATE.
Step 1. Check the coolant level (Figure 7-137).
Start engine and run for several minutes. Check temperature on temperature gages.