Fuses and relays Lincoln Aviator (UN152; 2002–2005)

This article provides detailed fuse box diagrams and relay assignments for the first-generation Lincoln Aviator (chassis code UN152; model years 2003–2005).

Fuses #3 (2005 model year), #16 (Auxiliary power outlet 3), #25 (Auxiliary power outlet 1), and #28 (Auxiliary power outlet 2) in the engine compartment fuse box, along with Fuse #16 (2003–2004 model years) in the passenger compartment fuse panel, supply power to the cigarette lighter and auxiliary power outlets.

Engine Compartment

Component locations:

1. Fuse box (Power Distribution Box);
2. Auxiliary relay block.

Fuse Box

Located on the left side (driver’s side) of the engine compartment, beneath a protective plastic cover.

Fuse box cover access.

Diagram
No.	Description	Rating
Relays
47	Horn relay
48	Fuel pump relay
49	High-beam headlamp relay
50	Fog lamp relay
51	Unused
52	A/C clutch relay
53	Trailer tow right turn signal relay
54	Trailer tow left turn signal relay
55	Front blower motor relay
56	Starter relay
57	Powertrain Control Module (PTEC) relay
58	Ignition relay
59	2003–2004: Driver brake applied (DBA) relay
Diodes
60	PCM diode
61	A/C clutch diode
Fuses
1	Power Junction Box (PJB) supply	60 A
2	Power door locks (Body Security Module)	30 A
3	Cigarette lighter fuse (2005)	20 A
4	Heated rear glass / power heated mirrors	40 A
5	ABS / Roll Stability Control (RSC) pump motor	40 A
6	Delayed accessory power relay	60 A
7	Daytime Running Lamps (DRL) module	20 A
8	Engine cooling fan motor	20 A
9	Headlamp switch	20 A
10	ABS module / RSC module (solenoid valves)	30 A
11	PCM (PTEC) relay contacts	40 A
12	Ignition/Starter relay feed	50 A
13	Trailer tow relays	40 A
14	Brake lamp supply switch	15 A
15	Courtesy lamps (2005) / Keep-alive power (PCM, instrument cluster, DEATC)	10 A
16	12 V Auxiliary power outlet #3	20 A
17	Rear window wiper motor	20 A
18	4x4 control module	20 A
19	Driver power window motor	30 A
20	Electric trailer brake controller module	30 A
21	Memory seat module (MSM)	30 A
22	Exterior lamps (low beams, fog lamps, high beams)	20 A
23	Ignition switch feed	30 A
24	Horn relay feed	20 A
25	12 V Auxiliary power outlet #1	20 A
26	Fuel pump relay contacts	20 A
27	Trailer tow relays feed	20 A
28	12 V Auxiliary power outlet #2	20 A
29	Power Junction Box (PJB) feed	60 A
30	Windshield wiper motor	30 A
31	Climate-controlled seat modules	30 A
32	Front passenger power seat switch	30 A
33	Auxiliary blower motor	30 A
34	Right High-Intensity Discharge (HID) headlamp relay	20 A
35	Left High-Intensity Discharge (HID) headlamp relay	20 A
36	Climate control blower motor	40 A
37	A/C clutch relay, transmission control, thermal expansion valve (TXV), speed control module	15 A
38	HEGO sensors, canister vent solenoid, VMV valve, EGR module, IMCC/LSRC, heated PCV valve (2003)	15 A
39	Idle Air Control (IAC) valve (2005) / Fuel injectors	15 A
40	PCM (PTEC), fuel pump relay coil, Mass Air Flow (MAF) sensor	15 A
41	PCM (PTEC) diode/relay, ignition coil-on-plug (COP) units	25 A
42	Halogen right low-beam headlamp	10 A
43	Halogen left low-beam headlamp	10 A
44	2004–2005: Heated PCV valve (equipped with DRL)	2 A
	2003: Fog lamps	15 A
45	2003–2004: Brake pressure switch	2 A
46	High-beam headlamps, fog lamps (2004–2005)	20 A
62	Circuit Breaker: Moonroof, power windows, audio system (delayed accessory power)	30 A

Auxiliary Relay Block

Located on the driver’s side inner fender apron (underneath the speed control actuator).

1	Left HID headlamp relay
2	Right HID headlamp relay
4	Electric Cooling Fan (EDF) low-speed relay

Passenger Compartment

The vehicle interior contains two fuse panels: the main instrument panel fuse box located under the driver’s side dashboard, and an auxiliary relay block located in the rear cargo area.

Instrument Panel Fuse Box

Located under the driver’s side of the dashboard.

Fuse panel access.

Fuse box component layout.

Diagram
No.	Description	Rating
Front Side
1	Driver seat control switch, moonroof, driver seat power lumbar support	30 A
2	Variable Assist Power Steering (VAPS) module, Body Security Module (BSM), memory seat module, Tire Pressure Monitoring System (TPMS), sunload/autolamp sensor, SecuriLock LED indicator	10 A
3	Navigation control unit / Audio head unit	20 A
4	Windshield wiper module	5 A
5	Turn signal / hazard flasher module	15 A
6	Electronic Hidden Antenna Module (EHAM/antenna amplifier), audio unit, moonroof, driver power window motor, navigation control unit and microphone	5 A
7	Dual Electronic Automatic Temperature Control (DEATC) module / heated power mirrors	15 A
8	Daytime Running Lamps (DRL) module Heated PCV valve (2004–2005)	5 A
9	Backup lamps (Digital Transmission Range Sensor - DTRS) Electrochromic auto-dimming mirror (2004–2005)	10 A
10	Heated rear glass relay coil, auxiliary climate control blend/mode actuators, climate-controlled seat modules, A/C clutch relay contact feed	10 A
11	Unused	20 A
12	Supplemental Restraint System (SRS) module / Airbag module	15 A
13	Brake-shift interlock solenoid	10 A
14	2003: Cornering lamps	5 A
15	Rear window wiper module, instrument cluster, Tire Pressure Monitoring System (TPMS)	5 A
16	2003: Cigarette lighter, Data Link Connector (OBD-II), liftgate release relay coil and contacts	15 A
	2005: Data Link Connector (OBD-II)
	2004: Cigarette lighter fuse, Data Link Connector (OBD-II)	20 A
17	Battery saver relay coil/contacts / delayed accessory relay coil	15 A
18	Unused	5 A
19	Windshield washer pump motor	15 A
20	Gearshift selector, power mirror switch, digital clock, rear seat entertainment system (DVD)	5 A
21	Brake pressure switch (ABS) Interactive Vehicle Dynamics (IVD) switch (2003–2004) Roll Stability Control (RSC) switch (2005) Flasher relay	10 A
22	ABS / RSC control module	10 A
23	2004–2005: Liftgate release relay coil and contacts	7.5 A
	2003: Autolamp / sunload sensor	5 A
24	2004–2005: Navigation module / Subwoofer amplifier	30 A
	2003: Navigation module / Subwoofer amplifier	20 A
25	Trailer tow battery charge relay coil, puddle lamp relay coil (2003)	5 A
26	Unused	5 A
27	Variable Assist Power Steering (VAPS) module / Reverse park assist module	5 A
28	Navigation / audio head unit	5 A
29	Digital Transmission Range Sensor (DTRS), Fuse #28 supply	10 A
30	Compass module, instrument cluster, auxiliary climate control relay coil	5 A
Rear Side (Access requires removal of the fuse panel assembly)
1	Turn signal / hazard flasher relay
2	Heated rear window relay
3	Delayed accessory power relay
4	Unused
5	Battery saver relay
6	Unused
7	Unused

Rear Auxiliary Relay Block

Located behind the rear left quarter trim panel.

Note: Servicing of this relay block should be performed by an authorized service center or technician.

Diagram
No.	Description
1	Liftgate release solenoid relay
2	Unused
3	Unused
4	Trailer tow backup lamps relay
5	Unused
6	Unused
7	Trailer tow battery charge relay
8	Trailer tow parking lamps relay
9	Unused
10	2003: Puddle lamps relay
11	Unused
12	Unused