Fuel Pump Relay

Fuel pump relay is used to provide voltage to fuel pump. Fuel pump relay is located in power distribution center at driver's side front corner of engine compartment, near the battery. Fuel pump relay receives constant battery voltage at one side of relay from fuse No. 13 (20-amp) in power distribution center. When ignition is on, fuel pump relay receives voltage at the other side of the relay from Positive Temperature Coefficient (PTC) No. 1 in junction block located behind driv-er's side of instrument panel, to the left of steering column. PTC is a specified amperage solid-state circuit breaker. The Powertrain Control Module (PCM) controls the ground circuit for fuel pump relay. When ignition is on, PCM completes ground circuit for fuel pump relay and voltage is supplied to the fuel pump. If crankshaft position sensor does not detect engine rotation, the PCM opens the ground circuit and de-energizes the fuel pump.

If fuel pump relay or control circuit failure exists, a Diagnostic Trouble Code (DTC) may be stored in the PCM. See SELF-DIAGNOSTICS INTRODUCTION - FWD VANS article. For additional information on diagnosis for fuel pump relay and control circuit, see appropriate NO START (NS) TEST in TESTS W/CODES - 2.4L article.