Circuit Open/Short Inspection

Inspect the following wiring harnesses for an open or short circuit (continuity check).
Open circuit
- If there is no continuity, the circuit is open. Repair or replace the harness.
  - Fuel pump unit terminal B and fuel pump relay terminal C
  - Fuel pump unit terminal D and body ground
    
    Fig 1: Identifying Fuel Pump Unit And Fuel Pump Relay Connector Terminals
    Courtesy of MAZDA MOTORS CORP.
Short circuit
- If there is continuity, the circuit is short. Repair or replace the harness.
  - Fuel pump unit terminal A and body ground
  - Fuel pump unit terminal E and power supply