RELAY
SOURCE: HOW TO REMOVE A HEATER CORE IN A 2003 LINCOLN NAVIGATOR
U must remove the entire dash assembly and then the heater core housing which is part of the air distribution box, time to do the job 10-15 hours.
SOURCE: owners manual ?
"looking 4 da relay"
there is a solid state relay for the air suspension system , it is next to or near the air suspension pump located at right front of engine compartment ( relay has a 4 wire connector , colors grey/red , light blue/pink , light green/red , and a dark blue/yellow , also behide the right interior kick panel is a fuse area , 3 fuses are involved with this circuit , fuse #111 - a 50 amp fuse , fuse #27 a 5 amp fuse , and fuse #20 a 30 amp fuse , and don't forget the air suspension service on/off switch . if your not 100% happy with my answer , tell me what i can do to help .
free owners manual ?, best i can say is try ebay , here is several available on ebay.
ebay 03 lincoln navagator owners manuals
J5
SOURCE: 2003 Lincoln Navigator door sensor problems
One of your courtesy light switch's is defective, it can be in any of the five doors (rear hatch has 2), Ford can determine which one (courtesy light switch) is at fault by using a NGS (New Gen Star Tester) to monitor the switches through the Generic Electronic Module of your truck, these switches are attached to the door latch assembly and are time consuming to replace, so the Ford tester is the cheapest option.
SOURCE: need to find fuel pump relay on 2003 lincoln
in the passenger compartment fuse box the relay is
R303 Fuel pump relay
SOURCE: The rear a/c is making a clicking sound/2003 Lincoln Navigator
you have a bad blend door actuator the clicking sound you hear is the plastic gears inside it slipping the panels covering rear unit can be removed once removed cut a/c on once clicking starts you should be able to tell which one it is they are about the size of a cell phone usually twoo or three screws holding on to air box and one small electrical connector remove and call ford dealership with part# listed on the actuator and purchase new one these are not available aftermarket that i know of
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