tedallen
Active Member
Hello,
I own both a 1997 Expedition and the subject vehicle. I have previously replaced the fuel pump in the Exception and am now having an issue with the Navigator. I have posted about this issue on the Lincoln Navigator forum and have had over 30 views, but no replies so I am hoping someone knowledgeable in this forum can assist.
I do not hear the pump when the key is first turned to the on position. I do hear clicks from at least one of the fuel pump relays (I replaced the user-serviceable one just in case it was at fault). I verified that the associated fuse is good as well. I am trying to determine how I can test the pump and the circuit from the fuse box to it without dropping the fuel tank, as I see no way to reach the connector on the pigtail to the pump without lowering the tank. According to the owner's manual there is a non-serviceable relay soldered to the fuse panel PCB. I have seen videos where a connector was unplugged above the fuse panel and the voltage was tested at this point when the key was turned on to make sure the relay was providing 12v. I 12v jumper was also run to the connector on one of the pins to supply 12v through the vehicle harness to the pump to see if it energized. I am trying to determine if this is applicable to my vehicle, and if so, which connector and which were within the connector would be the 12v supply from the relay to the pump? The manual I have covers a wide range of Expedition and Navigator vehicles and the wiring diagrams aren't matching up with what I am seeing. I have confirmed that the 2004 Navigator does not have the problematic fuel pump driver module mounted on top of the driver's side rear frame rail inside the fender well.
The video I saw for a 2004 and newer Expedition showed the 12v power as being on a Green/yellow wire coming from a connector at the top of the fuse panel. I think the fuse box housing had a blue highlight around the opening for this connector. However, the connector I have in that location has significantly more wires in it and I don't see a wire that is green with a yellow tracer.
I would appreciate any assistance anyone can provide regarding a wiring schematic and any troubleshooting tips. I also thought about trying to check for voltage at the fuel inertia switch which I thought might be the last item in the link to the pump, but I wasn't sure if it would just disrupt ground or if it would actually cut the 12v supply. I would hope it would interrupt the 12v supply.
Best Regards,
Ted
I own both a 1997 Expedition and the subject vehicle. I have previously replaced the fuel pump in the Exception and am now having an issue with the Navigator. I have posted about this issue on the Lincoln Navigator forum and have had over 30 views, but no replies so I am hoping someone knowledgeable in this forum can assist.
I do not hear the pump when the key is first turned to the on position. I do hear clicks from at least one of the fuel pump relays (I replaced the user-serviceable one just in case it was at fault). I verified that the associated fuse is good as well. I am trying to determine how I can test the pump and the circuit from the fuse box to it without dropping the fuel tank, as I see no way to reach the connector on the pigtail to the pump without lowering the tank. According to the owner's manual there is a non-serviceable relay soldered to the fuse panel PCB. I have seen videos where a connector was unplugged above the fuse panel and the voltage was tested at this point when the key was turned on to make sure the relay was providing 12v. I 12v jumper was also run to the connector on one of the pins to supply 12v through the vehicle harness to the pump to see if it energized. I am trying to determine if this is applicable to my vehicle, and if so, which connector and which were within the connector would be the 12v supply from the relay to the pump? The manual I have covers a wide range of Expedition and Navigator vehicles and the wiring diagrams aren't matching up with what I am seeing. I have confirmed that the 2004 Navigator does not have the problematic fuel pump driver module mounted on top of the driver's side rear frame rail inside the fender well.
The video I saw for a 2004 and newer Expedition showed the 12v power as being on a Green/yellow wire coming from a connector at the top of the fuse panel. I think the fuse box housing had a blue highlight around the opening for this connector. However, the connector I have in that location has significantly more wires in it and I don't see a wire that is green with a yellow tracer.
I would appreciate any assistance anyone can provide regarding a wiring schematic and any troubleshooting tips. I also thought about trying to check for voltage at the fuel inertia switch which I thought might be the last item in the link to the pump, but I wasn't sure if it would just disrupt ground or if it would actually cut the 12v supply. I would hope it would interrupt the 12v supply.
Best Regards,
Ted