FuelPump Relay Issues. Another potential cause for bad fuel pump symptoms is a faulty fuel pump relay. This relay controls the power supply to your CR-V's fuel pump, and a faulty relay may lead to: Intermittent power loss to the fuel pump; Inability to start your vehicle; Unpredictable pump operation, leading to stalling or rough running Relay R1: Fold-back Mirror Module: R2: Accessory Relay: R3: Estate: Rear Wiper Motor Relay: R4: Blower Motor Relay: R5: Passenger Junction Fuse Box Ignition Relay: R6: Heated Rear Window Relay: R7: Throttle Motor Relay (2.5 L, 3.0 L) (Non-Serviceable PCB Relays) Fuel Pump Relay (2.0 L) (Non-Serviceable PCB Relays) R8: Not Used (Non-Serviceable
Inmy 1973, they are all the same, so you can just swap the relays, but it's better to keep one on hand. If you have a failed Fuel Pump Relay there is kinda of a way to test it. You can "hot wire" the FPR and see if your car starts. The manual describes a 15-step test procedure.
Any6.0L F-Super Duty truck: The fuel pump relay is located inside the instrument panel relay box. This means it is integral to the box and you will need to replace the fuse box if the relay fails. The "DRIVER" is an electrical ground inside the PCM. If you want fuse info, circuit colors and locations, you will need to be more specific. Potentialcauses of a P0231 code include: Bad FP (fuel pump) relay. Harness chafing causing open in fuel pump supply circuit. Loose/damaged connectors. Open in feedback circuit. Fuel pump fuse blown due to short to ground. NOTE: If no drivability complaints are present and P0231 code is stored, suspect open in feedback circuit between splice . 351 308 33 378 52 119 16 437

when a fuel pump relay is bad