Fuse/Relay
LocationFuse Amp
RatingProtected Circuits
35 10A Rear park assist, Blind spot
monitor system, Rear video
camera, AWD
36 5A Passive Anti-Theft Sensor (PATS)
transceiver
37 10A Not used (Spare)
38 20A Subwoofer amplifier
39 20A Radio
40 20A Not used (Spare)
41 15A Automatic dimming mirror, Moon
roof, Compass, Front windows
42 10A Electronic stability control,
Adaptive headlamps
43 10A Rain sensor
44 10A Fuel diode/Powertrain control
module
45 5A Heated backlight and blower relay
coil, Wiper washer
46 7.5A Occupant Classification Sensor
(OCS) module, Passenger airbag
off lamp
47 30A Circuit
BreakerRear windows
48 — Delayed accessory relay
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.
2010 MKZ(378)
Owners Guide, 1st Printing
USA(fus)
Roadside Emergencies
238
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 — Not used
2 — Not used
3 40A* Powertrain control module (PCM)
(relay 57 power)
4 — Not used
5 30A* Starter motor (relay 55 power)
6 40A* Rear defrost (relay 53 power)
7 — Not used
8 40A* Anti-lock Brake System (ABS)
pump
9 20A* Wipers washer
2010 MKZ(378)
Owners Guide, 1st Printing
USA(fus)
Roadside Emergencies
239
