Ford F-53 Motorhome Chassis (2017 year). Manual — part 18

Protected components

Fuse amp rating

Fuse or relay number

Trailer tow electronic brake.

30A**

J12

Ignition switch feed (instrument panel
fuses #1, 5, 7, 11, 13, 14, 17, 19, 23, 36).

40A**

J13

(Power distribution box fuse #F19, F22,
F21).

Not used.

—

J14

Instrument panel battery feed (fuse #15,
21).

60A**

J15

Lighting primary fuse.

Horn.

20A**

J16

Ignition switch feed (instrument panel
fuses #5, 11, 17, 23, 38).

40A**

J17

Brake on/off switch.

20**

J18

Multifunction switch.

Not used.

—

J19

Not used.

—

J20

Not used.

—

J21

Reverse lamp relay coil.

20A**

J22

A/C clutch relay coil.
A/C demand switch.

Horn relay.

—

R1

Fuel pump relay.

—

R2

Starter relay.

—

R3

Backup lamps relay.

—

R4

Brake on/off signal isolating relay
(Hydromax).

—

R5

Trailer tow parking lamps relay.

—

R6

Not used.

—

R7

Air conditioning clutch relay.

—

R8

Not used.

—

R9

Starter relay.

—

R10

Protected components

Fuse amp rating

Fuse or relay number

Blower motor relay.

—

R11

Daytime running lamp/headlamp relay.

—

R12

Powertrain control module relay.

—

R13

Fuel pump diode.

—

D1

Air conditioning clutch diode.

—

D2

Not used.

—

D3

Not used.

—

C1

*

Mini fuses.

**

J-case fuse.

UPS Power Distribution Box 1

E172543

Protected components

Fuse amp rating

Fuse or relay number

Powertrain control module.

Relay

R1

Daytime running lamps.

Relay

R2

Starter motor.

Relay

R3

Blower motor.

Relay

R4

Horn.

Relay

R5

Fuel pump.

Relay

R6

Starter ground.

Relay

R7

Protected components

Fuse amp rating

Fuse or relay number

Trailer tow parking lamps.

Relay

R8

Backup lamps.

Relay

R9

Hydromax brake on/off relay.

Relay

R10

Not used.

Relay

R11

Not used.

Relay

R12

Hydromax brake on/off relay.

10A

M1-1

BTSI (Column shift).

20A

M1-2

Power brake assist module (Hydromax).

5A

M1-3

Powertrain control module.

10A

M1-4

UPS Power Distribution Box 2

E172544

Protected components

Fuse amp rating

Fuse or relay number

Backup lamp feed.

25A*

M1

Trailer tow backup lamp feed.

Daytime running lamps.

20A*

M2

4–channel anti-lock brake system module
(Hydromax).

30A*

M3

Powertrain control module run/start.

20A*

M4

Fuel pump relay coil.
Fuel pump diode.

Protected components

Fuse amp rating

Fuse or relay number

Brake lamps.

10A*

M5

Radio capacitors.

20A*

M6

Ignition coils.

Backup lamp relay coil.

5A*

M7

Air conditioning clutch coil.
Air conditioning demand switch.

Catalyst monitor sensor.

20A*

M8

Engine heated exhaust gas oxygen sensor
#11 and #21.
Vapor management valve.

Powertrain control module power.

20A*

M9

Not used.

—

M10

Powertrain control module relay keep alive
power.

5A*

M11

Powertrain control module relay coil.

Parking lamps feed.

20A*

M12

Not used.

Diode

D1

Fuel pump.

Diode

D2

Air conditioning clutch.

Diode

D3

Not used.

—

R2-1

Powertrain control module relay feed
(power distribution box fuse M6, M7, M8,
M9).

30A**

J1

Fuel injectors.

20A**

J2

Fuel pump motor.
Mass airflow sensor.
Powertrain control module.

Cigar lighter power point.

20A**

J3

Diagnostic connector.

Blower motor.

40A**

J4

Headlamps.

30A**

J5

Daytime running lamps on/off relay coil.
Headlamp daytime running lamp relay
feed.