Power distribution box
The power distribution box is located in the engine compartment. The
power distribution box contains high-current fuses that protect your
vehicle’s main electrical systems from overloads.
WARNING:Always disconnect the battery before servicing high
current fuses.
WARNING:To reduce risk of electrical shock, always replace
the cover to the power distribution box before reconnecting the
battery or refilling fluid reservoirs.
If the battery has been disconnected and reconnected, refer to the
Batterysection of theMaintenance and Specificationschapter.
The high-current fuses are coded as follows:
Fuse/Relay
LocationFuse Amp
RatingProtected Circuits
1 — Powertrain control module
(PCM) relay
2 — Starter relay
3 — Blower motor relay
Roadside Emergencies
271
2012 Navigator(nav)
Owners Guide, 1st Printing
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Fuse/Relay
LocationFuse Amp
RatingProtected Circuits
32 40A** Blower motor relay
33 40A** 110V AC power point
34 30A** Auxiliary blower motor
35 30A** PCM relay
36 30A** Power liftgate
37 — TT left hand stop/turn relay
38 — TT right hand stop/turn relay
39 — Backup lamps relay
40 — Electronic fan 2 relay
41 10A* PCM keep-alive power
42 — Not used
43 5A* Brake on/off switch
44 20A* Fuel pump relay
45 25A* TT stop/turn lamps relay
46 — Not used
47 — Not used
48 30A** RAS module
49 — Not used
50 30A** Front wiper motor relay
51 40A** Rear window defroster/heated
mirror relay
52 10A* Anti-lock brake system (ABS)
R/S feed
53 10A* RAS module
54 — Not used
55 5A* Fuel pump relay coil R/S feed
56 30A* Passenger compartment fuse
panel R/S feed
57 10A* Blower motor relay coil
58 15A* TT backup lamps
59 15A* Heated mirrors
Roadside Emergencies
273
2012 Navigator(nav)
Owners Guide, 1st Printing
USA(fus)
