Test NS-7B - Checking Fuel Pump

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION  . For appropriate wiring diagram, see WIRING DIAGRAMS  at end of article.

1. Turn ignition switch to OFF position. Disconnect fuel pump relay connector. See Figure . Turn ignition switch to ON position. Probe fuel pump relay connector terminal "C" (Dark Blue wire).
2. If voltage is less than 10 volts, repair Dark Blue wire for an open to splice. Perform VERIFICATION PROCEDURE VER-1. If voltage is more than 10 volts, go to next step.
3. Using an external ohmmeter, check resistance across fuel pump relay terminals. See Fig 1 . If resistance is more than 100 ohms, replace fuel pump relay. Perform VERIFICATION PROCEDURE VER-1.
4. If resistance is less than 100 ohms, repair open in Dark Blue/Yellow wire from fuel pump relay connector to splice. Perform VERIFICATION PROCEDURE VER-1.

Fig 1: Checking Relay Resistance