Fuel Pump Relay: Testing and Inspection
Fuel Cut-off Relay Test1. With the ignition switch off, remove the dashboard under cover, and pull down the fuse box/relay panel.
2. Remove the fuel cut-off relay.
3. Check for continuity between the No.3 terminal and body ground.
Continuity should exist.
- If there is no continuity, check the Black wire.
4. Attach the positive probe of the voltmeter to the No.2 terminal and the negative probe to the No.3 terminal. Then turn the ignition switch ON.
Battery voltage should be available.
- If there is no voltage, check the Black/Yellow wire from the ignition switch and fuel cut-off relay as well as No.1 fuse (15 A).
5. Turn the ignition switch OFF.
Attach the positive probe of the voltmeter to the No.4 terminal and the negative probe to the No.3 terminal. Then turn the ignition switch ON.
Battery voltage should be available.
- If there is no voltage, check the Blue wire from the ignition coil and fuel cut-off relay.
6. Turn the ignition switch OFF.
Connect a jumper wire between the No.1 terminal and the No.2 terminal.
7. Turn the ignition switch ON.
The fuel pump should run.
- If the fuel pump does not run, check the Yellow wire between the fuel pump and fuel cut-off relay, and check the Black wire from the fuel pump to ground.
If the wires are OK, replace the fuel cut-off relay and retest.