Section 18-01: Wiring and Circuit Protection
1996 F-150, F-250, F-350, F-Super Duty Chassis Cab, Motorhome Chassis, and Bronco Workshop Manual
DESCRIPTION AND OPERATION

Power Distribution Box

Location

F-Series and Bronco vehicles are equipped with a power distribution box located in the engine compartment on the left-hand fender apron.

Content



F-Series Power Distribution Box, Diesel Engine Only






Fuse PositionAmpsCircuits Protected
120Radio
215Ambulance (Diesel 215 Amp Generator/Voltage Regulator Only)
330Horn Relay, Daytime Running Lamps (DRL), Headlamp Flash-To-Pass
425Trailer Marker Lamps Relay, Trailer Backup Lamps Relay
515Backup Lamps, Daytime Running Lamps (DRL), Trailer Battery Charge Relay
610Trailer Right Stop/Turn Lamps
710Trailer Left Stop/Turn Lamps



Maxi-Fuse PositionAmpsCircuits Protected
830Injector Driver Module (IDM) Power
930Powertrain Control Module (PCM), PCM Power Relay, Electronic Transmission Control, Injector Pressure Regulator, Injector Driver Module
1020See Fuses 15 and 18 (IP Fuse Panel), Starter Relay
11—Not Used
1220Diode Current Flows from Fuse 22 to PCM Power Relay
1350See Fuses 5, 9 and 13 (IP Fuse Panel)
14—Not Used
1550See Fuses 1 and 7 (IP Fuse Panel) and Fuse 5
16—Not Used
1750Generator Charge Indicator, Instrument Cluster. See Fuses 2, 3, 6, 11 and 17 (IP Fuse Panel) and Maxi-Fuse 22. Also See Circuit Breaker 12.
1830Trailer Battery Charge Relay
1940Main Light Switch, Headlamps
2050See Fuses 4, 8 and 16 (IP Fuse Panel). Also See Circuit Breaker 12.
2130Trailer Electronic Brake Control Unit
2220Fuel Line Heater, 215 Amp Generator/Voltage Regulator, PCM Power Relay Coil, Glow Plug Controller
Relay 1RelayPowertrain Control System
Relay 2RelayInjector Driver Module (IDM) Relay
Relay 3RelayHorn
Relay 4RelayTrailer Tow or Dual Rear Wheel Running Lamps
Relay 5—Not Used



F-Series Power Distribution Box, Gasoline Engine Vehicles Only






Fuse PositionAmpsCircuits Protected
120Radio
2—Not Used
330Horn Relay, Daytime Running Lamps (DRL), Headlamp Flash-to-Pass
425Trailer Marker Lamps, Trailer Backup Lamps Relay
515Heated Oxygen Sensor (HO2S), Backup Lamps, Trailer Battery Charge Relay, Daytime Running Lamps (DRL), Speed Control
610Trailer Right Stop/Turn Lamps
710Trailer Left Stop/Turn Lamps



Maxi-Fuse PositionAmpsCircuits Protected
8—Not Used
930PCM Power Relay, Powertrain Control Module (PCM)
1020See Fuses 15 and 18 (IP Fuse Panel), Starter Relay
11—Not Used
12 Diode20Diode Current Flows from Fuse 22 to PCM Power Relay
1350See Fuses 5, 9, and 13 (IP Fuse Panel)
14—Not Used
1550See Fuses 1 and 7 (IP Fuse Panel) and Fuse 5 (Power Distribution Box)
1620Fuel Pump Relay
1750Generator Charge Indicator, Instrument Cluster, See Fuses 2, 6, 11, 17 (IP Fuse Panel) and Maxi-Fuse 2. Also See Circuit Breaker 14.
1830Trailer Battery Charge Relay
1940Main Light Switch, Headlamps
2050See Fuses 4, 8 and 16 (IP Fuse Panel). Also See Circuit Breaker 12.
2130Trailer Electronic Brake Control Unit
2220Ignition System, PCM Power Relay Coil
Relay 1RelayPCM Power Relay
Relay 2RelayFuel Pump Relay
Relay 3RelayHorn Relay
Relay 4RelayTrailer Marker Lamps Relay
Relay 5RelayWOT Relay (4.9 California Only)



Bronco Power Distribution Box






Fuse PositionAmpsCircuits Protected
120Radio
2304WABS Relay No. 1
330Horn Relay, Daytime Running Lamps (DRL), Multi-Function Switch, Speed Control
425Trailer Marker Lamps Relay, Trailer Backup Lamps Relay
515Heated Oxygen Sensor (HO2S), Backup Lamps, 4WABS, Trailer Battery Charge Relay, Daytime Running Lamps (DRL), Speed Control
610Trailer Right Stop/Turn Lamps
710Trailer Left Stop/Turn Lamps



Maxi-Fuse PositionAmpsCircuits Protected
8304 WABS Relay No. 2
930PCM Power Relay, Powertrain Control Module (PCM)
1020See Fuse 18 (IP Fuse Panel), Starter Relay
11—Not Used
12 (Diode)20Ignition System, PCM Power Relay Coil
1350See Fuses 5, 9 and 13 (IP Fuse Panel)
1430Rear Window Defrost
1550See Fuses 1 and 7 (IP Fuse Panel) and Fuse 5
1620Fuel Pump Relay
1750See Fuses 2, 6, 11 and 17, Maxi-Fuse 22 and Circuit Breaker 14
1830Trailer Battery Charge Relay
1940Main Light Switch, Headlamps
2050See Fuses 4, 8 and 16 (IP Fuse Panel). Also See Circuit Breaker 12.
2130Trailer Electronic Brake Control Unit
2220Diode Current Flows from Fuse 22 to PCM Power Relay
Relay 1RelayPCM Power Relay
Relay 2RelayFuel Pump Relay
Relay 3RelayHorn Relay
Relay 4RelayTrailer Marker Lamps Relay
Relay 5Relay4WABS Relay No. 2



F-Super Duty Motorhome Power Distribution Box






Fuse PositionAmpsCircuits Protected
115Cigar Lighter
220Headlamp Flash-to-Pass, Daytime Running Lamps (DRL) Module
320Horn Relay, Speed Control
420Body Builders Battery Accessory Feed
515Heated Oxygen Sensor (HO2S), Backup Lamps, Blower Motor Relay
610Speed Control (Main Power to Module)
7—Not Used
8—Not Used



Maxi-Fuse PositionAmpsCircuits Protected
9—Not Used
10—Not Used
1120Transmission Range Sensor, Starter Motor Relay, Ignition Control Module
12DiodePCM Relay
1330PCM Relay, Fuel Pump Relay, E4OD Transmission, Engine Controls
1460Ignition Switch
15—Not Used
1650Blower Motor Relay
1760Headlamps, Main Light Switch, PSOM, Exterior Lamps, Interior Lamps
1820Fuel Pump Relay, Fuel Sender
19—Not Used
20—Not Used
21—Not Used
2220Ignition Control Module, Ignition Coil, Distributor, Radio Capacitor, PCM Relay Coil
Relay 1RelayPCM Power Relay
Relay 2RelayFuel Pump Relay
Relay 3RelayHorn Relay
Relay 4RelayBlower Motor Relay
Relay 5—Not Used