Mercury Repair Questions? Ask a Mechanic for Answers ASAP
To isolate the problem the following test will need to be done.1. Check power to the Fuel Pump Driver Module (FPDM) on the Blue (BL) wire from the inertia switch. This circuit should show battery voltage with the key in the run position. 2. Check the Black (BK) wire of the FPDM for a good ground. 3. Check the Blue/White (BL/WT) wire of the FPDM for battery voltage with the key on. This circuit provides power to the fuel pump from the FPDM when the ignition switch is on. 4. Backprobe the Blue/Black (BL/BK) wire of the FPDM with a jumper wire. Ground this circuit with the ignition switch on and a fuel pressure gauge installed at the fuel pressure rail. When grounding this circuit, fuel pressure should exceed 70 PSI at the fuel injection rail. 5. If all circuit voltage checks OK, but fuel pressure does not meet the specification in step 4, replace the fuel pump
where is this FPDM located
located behind luggage compartment lining, LH-side
ok i will check
ok, let me know if you need more help
The inertia switch powers up the fuel pump driver module, so if you are getting that power to the module from the inertia switch, then check the black wire for ground, do you have ground to the module? When you have both power and ground to the module then the module will send power to the pump step #3
3. Check the Blue/White (BL/WT) wire of the FPDM for battery voltage with the key on. This circuit provides power to the fuel pump from the FPDM when the ignition switch is on. No power out bad module.