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The high-current fuses and relays are coded as follows.
Fuse/Relay
Location
Fuse Amp
Rating
Power Distribution Box
Description
1 15A* Park lamps, Roof lamps
2 25A* Cummins Powertrain Control
Module (PCM)
15A* Foglamps (SuperCrewzer only)
3 10A* Generator
4 15A* Washer pump
5 15A* CAT air intake heater relay,
Cummins PCM
6 20A* CAT PCM, Cummins PCM
7 15A* Stop lamps
8 25A* CAT fuel heater
9 30A* Trailer hook-up lamps
(SuperCrewzer only)
10 15A* Shift modulator (Allison AT
transmission only) (except for
F–650 SuperCrewzer and
Caterpillar/Cummins)
503
304
303
302 301
502
501
207 201
202
203
204 122 118 114 110 106 102
121 117 113 109 105 101
120 116 112 108 104
119 115 111 107 103
24
209 206
208
18 16 14 12 10 8 6 4 2
17 15 13 11 9 7 5 3 1
205
23
22
21
401
20
19
Roadside Emergencies
156