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Mercury Grand Marquis Third Generation (1998 - 2002) Fuse Box Diagram

avatar Jonathan Yarden Feb 11, 2021 · 5 min. read

In this article you will find a description of fuses and relays Mercury, with photos of block diagrams and their locations. Highlighted the cigarette lighter fuse (as the most popular thing people look for).
Get tips on blown fuses, replacing a fuse, and more.

Year of production: 1998, 1999, 2000, 2001, 2002

Passenger compartment fuse panel

Mercury Grand Marquis 3rd Generation - fuse box - passenger compartment

The fuse panel is located below and to the left of the steering wheel by the brake pedal. Remove the panel cover to access the fuses.

Fuse/relay Ampere rating [A] Description
1 15 Brake Pedal Position (BPP) Switch, Speed Control, Multi-Function Switch
2 30 Wiper Control Module, Windshield Wiper Moto
3 Not used
4 15 Lighting Control Module, Main Light Switch
5 15 Backup Lamps, Variable Assist Power Steering (VAPS), Turn Signals, Air Suspension, Daytime Running Lamps, Electronic Day/Night Mirror, Shift Lock, EATC, Speed Chime Warning
6 15 Speed Control, Main Light Switch, Lighting Control Module, Clock
7 25 Powertrain Control Module (PCM) Power Diode, Ignition Coils
8 15 Lighting Control Module, Power Mirrors, PATS, Keyless Entry, Module, Clock Memory, Electronic Automatic Temperature Control (EATC), Power Windows, SecuriLock
9 30 Blower Motor, A/C-Heater Mode Switch
10 10 Air Bag Module
11 5 Radio
12 18 CB Lighting Control Module, Flash-to-Pass, Main Light Switch
13 15 Warning Lamps, Analog Cluster Gauges and Indicators, Electronic Automatic Transmission, Lighting Control Module
14 20 CB Window/Door Lock Control, Driver’s Door Module, One Touch Down
15 10 Anti-Lock Brakes, Instrument Cluster, Transmission Control Switch
16 20 Cigar Lighter; Auxiliary Power Point
17 10 Rear Defrost
18 10 Air Bag Module


Power distribution box

Mercury Grand Marquis 3rd Generation - fuse box - 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.

Fuse/relay Ampere rating [A] Description
1 20* Electric Fuel Pump Relay
2 30* Generator, Starter Relay, Fuses 15 and 18
3 25* Radio, CD Changer, Subwoofer Amplifier
4 Not used
5 15* Horn Relay
6 20* DRL Module
7 20 CB Power Door Locks, Power Seats, Trunk Lid Release
8 30** Air Suspension System
9 50** See Fuses 5 and 9
10 50** See Fuses 1, 2, 6, 7, 10, 11, 13 and Circuit Breaker 14
11 40** See Fuses 4, 8, 16 and Circuit Breaker 12
12 30** PCM Power Relay, PCM
13 50** High Speed Cooling Fan Relay
14 40** Rear Window Defrost Relay, Also see Fuse 17
15 50** Anti-Lock Brake Module
16 Not used
17 30 CB Cooling Fan Relay
Relay 1 Rear Defrost Relay
Relay 2 Horn Relay
Relay 3 Cooling Fan Relay
Relay 4 Air Suspension Pump Relay
* Mini Fuses ** Maxi Fuses

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

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