Fuses and relays Lincoln Navigator (UN173; 1997–1998)

In this article, we take a detailed look at the fuse box diagrams for the first-generation Lincoln Navigator (UN173 chassis; model years 1997–1998).

Fuse #3 in the engine compartment fuse panel and fuses #10 and #11 in the passenger compartment fuse panel supply power to the cigarette lighter and 12V auxiliary power outlets.

Engine Compartment

Component locations:
1. Main fuse panel
2. Auxiliary fuse panel
3. High-current fuse box

Main Fuse Panel

General view.

Diagram
No.	Description	Amps
1	Turn/Hazard Flasher Relay	15 A
2	Redundant Steering Control Unit, Overhead Trip Computer (OTC), Instrument Cluster, Electronic Automatic Temperature Control (EATC) Module, Clock	5 A
3	Cigarette Lighter Fuse	25 A
4	Headlamps, Parking Lamps, Remote Anti-Theft Personality (RAP) Module, Autolamp Unit, Memory Seat and Mirror Module, Power Mirror Switch, Memory Seat Switch, Power Driver Seat Control Switch	5 A
5	Speed Control Servo/Amplifier Assembly, Daytime Running Lamps (DRL) Module, Digital Transmission Range (DTR) Sensor, EATC Clutch Relay	15 A
6	Generic Electronic Module (GEM), Brake Shift Interlock Solenoid, Compass Sensor, 4-Wheel Air Suspension (4WAS) Module, Heated Backlite Relay, Steering Wheel Angle Sensor, Overhead Trip Computer (OTC)	5 A
7	Console Blower Motor, Rear A/C Relay	5 A
8	Main Light Switch, Audio Unit, Generic Electronic Module (GEM), Remote Anti-Theft Personality (RAP) Module, Ignition Switch, Clock	5 A
9	Not used	—
10	Not used	—
11	Windshield Wiper Run/Park Relay, Windshield Washer Pump Relay	30 A
12	Data Link Connector (DLC)	5 A
13	Brake Deactivation Switch, Brake On/Off (BOO) Switch	15 A
14	Interior Lamp Relay, Battery Saver Relay	15 A
15	SecuriLock Passive Anti-Theft System (PATS), Generic Electronic Module (GEM)	5 A
16	Daytime Running Lamps (DRL) Module, Instrument Cluster (without DRL), High-Beam Headlamps	20 A
17	Left and Right Power/Heated Signal Mirrors, Heated Backlite Switch	10 A
18	Generic Electronic Module (GEM), Instrument Panel Illumination, Main Light Switch, Parking Lamp Relay, Trailer Tow Electronic Brake Control, Left and Right Side Marker Lamps, Trailer Tow Running Lamp Relay, Front Parking/Turn Lamps, Tail/Stop/Turn Lamps, License Plate Lamps	5 A
19	Airbag Diagnostic Monitor, Instrument Cluster	10 A
20	Memory Seat and Mirror Module, 4-Wheel Air Suspension (4WAS) Module, Generic Electronic Module (GEM)	5 A
21	Passenger Compartment Junction Box Fuse #20, Digital Transmission Range (DTR) Sensor	15 A
22	Ignition Switch, Airbag Diagnostic Monitor	10 A
23	Auxiliary A/C Mode Door Actuator, A/C Control Module, A/C Temperature Blend Door Actuator, Flasher Relay, Trailer Tow Battery Charge Relay, 4x2/4x4 Center Axle Disconnect Solenoid, Rear Integrated Control Panel (RICP), Electrochromic Auto-Dimming Mirror	10 A
24	Electronic Automatic Temperature Control (EATC) Module, Rear A/C Relay, Console Blower Motor Relay	10 A
25	4-Wheel Anti-Lock Brake System (4WABS) Module	5 A
26	Right Headlamp (fed via Multi-Function Switch), Daytime Running Lamps (DRL) Module	10 A
27	Fog Lamp Relay, Main Light Switch	5 A
28	Left Headlamp	10 A
29	Instrument Cluster, Autolamp Module, Transmission Control Switch (TCS)	5 A
30	SecuriLock Passive Anti-Theft System (PATS), Radio Ignition Interference Capacitor, Ignition Coils, PCM Power Diode, PCM Power Relay	30 A
31	Not used	—

Auxiliary Fuse Panel

Located adjacent to the main fuse panel.

Diagram
1	Powertrain Control Module (PCM)	5 A
2	Trailer Tow Turn Signal and Stop Lamps	20 A
3	CD Changer, Rear Integrated Control Panel (RICP), Audio Unit	10 A
4	Running Board Lamps	10 A
5	Subwoofer Amplifier, Audio System Amplifier	20 A
6	Not used	—

High-Current Power Distribution Box

Located adjacent to the battery.

Diagram
1	Mega-fuse – Power Distribution Box Feed	175 A
2	Mega-fuse – Alternator Output Feed	175 A
3	Mini-fuse – Alternator Field Circuit	20 A

Passenger Compartment

The fuse panel is located beneath the lower left side of the instrument panel, behind the access cover.

General view.

Diagram
No.	Description	Amps
1	Trailer Tow Reversing Lamp Relay, Trailer Tow Running Lamp Relay	20 A
2	Airbag Diagnostic Monitor	10 A
3	Driver Door Unlock Relay, All-Door Lock/Unlock Relay	30 A
4	Air Suspension Service Switch	15 A
5	Horn Relay	20 A
6	Rear Integrated Control Panel (RICP), Audio Unit, CD Changer, Subwoofer Amplifier Feed	30 A
7	Parking Lamp Relay, Main Light Switch	15 A
8	Headlamp Relay, Main Light Switch, Multi-Function Switch	30 A
9	Fog Lamp Relay, Daytime Running Lamps (DRL) Module	15 A
10	Instrument Panel 12V Auxiliary Power Outlet	25 A
11	Center Console 12V Auxiliary Power Outlet	25 A
12	Rear Wiper Up/Down Motor Relay	10 A
13	Rear A/C Relay	30 A
14	4-Wheel Anti-Lock Brake System (4WABS) Module	60 A
15	Air Suspension Solid-State Compressor Relay	50 A
16	Trailer Tow Left/Right Turn Relays, Trailer Tow Battery Charge Relay, Auxiliary Fuse Panel Fuse #2	40 A
17	Torque-on-Demand (TOD) Relay, Transfer Case Shift Relay	30 A
18	Memory Seat Module	30 A
19	Fuel Pump Relay	20 A
20	Ignition Switch Feeds	50 A
21		50 A
22	Passenger Compartment Junction Box Fuse Panel Feed	50 A
23	Instrument Panel Blower Motor Relay	40 A
24	PCM Power Relay, Powertrain Control Module (PCM), Auxiliary Fuse Panel Fuse #1	30 A
25	Accessory Delay Relay, Passenger Compartment Junction Box Circuit Breaker	30 A
26	Power Passenger Seat Control Switch	30 A
27	Heated Backlite Relay, Passenger Compartment Junction Box	40 A
28	Trailer Tow Electronic Brake Control Module	30 A
29	Rear Vent Windows / Power Sunroof, Regular Production Option (RPO) Relay Panel	30 A