Diesel Data: Automotive Repair

C37 Check Power to Relay Coil







- Jumper pins 34 and 60 at breakout box.

- Turn ignition switch to RUN position.

- Measure voltage between pin 86 and ground.

- Is there a minimum of 10 volts?

YES -- Go to C38. C38 Check Pump Motor Relay Coil

NO -- Service circuit 532.