Fuel Pump Circuit (960)

If fuel pumps do not operate with ignition on, connect Breakout Box (999-3070 ) to ECU. See Fig 1. Connect voltmeter between terminals No. 3 and 19. Voltmeter should indicate battery voltage. If battery voltage is not present, check wiring and voltage supply to pump relay. If voltage is present, check wiring and voltage supply to fuel pump.

Fig 1: Connecting Breakout Box To ECU (960 Shown; 850 Is Similar)

Courtesy of VOLVO CARS OF NORTH AMERICA.