IDENTIFICATION
| CAUTION | When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery. |
Auxiliary Battery Relay
Note. For component location, see ELECTRICAL COMPONENT LOCATOR article.
Auxiliary Relay Box 1
Note. For component location, see ELECTRICAL COMPONENT LOCATOR article.
Auxiliary Relay Box 1 Components. Scheme 307
Auxiliary Relay Box 2
Note. For component location, see ELECTRICAL COMPONENT LOCATOR article.
Note. Stripped chassis is not equipped with Auxiliary Relay Box 2.
Auxiliary Relay Box 2 Components. Scheme 308
Battery Junction Box (BJB) (14A003)
Note. For component location, see ELECTRICAL COMPONENT LOCATOR article.
Battery Junction Box Components. Scheme 309
| Fuse | Amps | Circuits protected |
|---|---|---|
| F1.1 | PCM power diode | |
| F1.3 | 10 | A/C clutch relay, Daytime Running Lamps (DRL) module (with daytime running lamps) |
| F1.4 | Not used | |
| F1.5 | 15 | Horn relay |
| F1.6 | 2 | Brake pressure switch (13411) |
| F1.7 | 60 | Ignition switch (11572), accessory delay relay (except stripped chassis) |
| F1.8 | 40 | Trailer tow relay, battery charge |
| F1.9 | 50 | Modified vehicle power |
| F1.10 | 30 | Trailer electronic brake control connector (Except stripped chassis) |
| F1.11 | 60 | ABS control module (2C219) |
| F1.12 | 60 | F2.29 (not used), F2.34 (stripped chassis), F2.38 (cutaway), F2.40 (except stripped chassis), F2.41 (with modified vehicle) |
| F1.13 | 20 | Fuel pump relay |
| F1.14 | 50 | Rear A/C blower speed relay 1 (with auxiliary A/C) |
| F1.15 | 30 | Main light switch (11654) |
| F1.16 | Not used | |
| F1.17 | 50 | Blower motor relay |
| F1.18 | 60 | F1.3, F1.5, F1.23 (diesel), F1.26, F2.26, F2.32 (except stripped chassis), Starter relay (diesel) |
| F1.19 | 50 | Fuel Injector Control Module (FICM) power relay (Diesel) |
| F1.20 | 60 | F1.8, F1.24, Auxiliary battery relay (with auxiliary battery) |
| F1.21 | 30 | F1.27, PCM power relay |
| F1.22 | 60 | F2.4, F2.5 (with power locks, without remote keyless entry), F2.10, F2.11, F2.17 (with power mirrors), F2.22 (not on stripped chassis), F2.23 (with remote keyless entry), F2.44, F2.16, (on stripped chassis) |
| F1.23 | 10 | Generator, Secondary (diesel with dual generators) |
| F1.24 | 20 | Trailer tow relay, reversing lamp; trailer tow relay, parking lamp |
| F1.25 | Not used | |
| F1.26 | 20 | Trailer tow relay, right turn; trailer tow relay, left turn |
| F1.27 | 10 | Powertrain Control Module (PCM) (12A650) |
| F1.28 | Not used | |
| *stripped chassis **4.6L/5.4L stripped chassis | ||
BATTERY JUNCTION BOX COMPONENTS LEGEND
Central Junction Box (CJB) (14A068)
Note. For component location, see ELECTRICAL COMPONENT LOCATOR article.
Central Junction Box Components. Scheme 310
| Fuse | Amps | Circuits protected |
|---|---|---|
| F2.1 | 5 | ABS control module (2C219) |
| F2.2 | 10 | Overdrive cancel switch (7G550) (except diesel), Vehicle Security Module (VSM) (15K602) (with remote keyless entry), tow/haul switch (7G550) (diesel) |
| F2.3 | 15 | Modified vehicle power (stripped chassis), radio (18806) (except stripped chassis), overhead console (with overhead console), Instrument cluster high beam indicator, DRL module, left high beam headlamp, right high beam headlamp |
| F2.4 | 15 | Battery saver relay, courtesy lamp switch (stripped chassis) |
| F2.5 | 30 | Master window/door lock/unlock switch (with power locks, without remote keyless entry), front passenger window/door lock switch (with power locks, without remote keyless entry), door lock switch, rear doors (with power locks, without remote keyless entry, except cutaway), not used (stripped chassis) |
| F2.6 | 10 | Brake shift interlock |
| F2.7 | 10 | Multifunction switch |
| F2.8 | 30 | Ignition transformer capacitor 1 (18801) (except diesel), Ignition transformer capacitor 2 (18801) (except diesel), PCM power diode. Fuel heater (diesel), Coil On Plug (COP) (except diesel), Fuel Injection Control Module (FICM) (diesel), PCM power relay |
| F2.9 | 5 | Wiper Control Module (WCM), modified vehicle power (stripped chassis) windshield wiper motor (17508) (except stripped chassis) |
| F2.10 | 20 | Main light switch (11654), multifunction switch, Vehicle Security Module (VSM) (15K602) (with remote keyless entry) |
| F2.11 | 15 | Multifunction switch, Brake pedal position switch (13480) |
| F2.12 | 15 | Digital Transmission Range (DTR) sensor (7F293) (except diesel), Auxiliary battery relay (with auxiliary battery), reversing lamp relay (Diesel) |
| F2.13 | 15 | Function selector switch assembly front, Temperature blend door actuator (19E616), modified vehicle power (stripped chassis) |
| F2.14 | 5 | Instrument cluster |
| F2.15 | 5 | Trailer tow relay, battery charge, instrument cluster, Daytime Running Lamps (DRL) module (with daytime running lamps) |
| F2.16 | 30 | Seal adjust switch, driver side front (14A701) (with power seats), not used (stripped chassis) |
| F2.17 | 5 | Exterior rear view mirror switch (17B676) (with power mirrors), not used (stripped chassis) |
| F2.18 | Not used | |
| F2.19 | Not used | |
| F2.20 | 10 | Restraints control module (14B321) (except stripped chassis) |
| F2.21 | Not used | |
| F2.22 | 15 | Radio (18806), instrument cluster, battery saver relay, interior lamp relay, accessory delay relay, modified vehicle power (stripped chassis) |
| F2.23 | 20 | Vehicle Security Module (VSM) (15K602) (with remote keyless entry), not used (stripped chassis) |
| F2.24 | Not used | |
| F2.25 | 10 | Headlamp, left (13008) (low beam) |
| F2.26 | 20 | Cigar lighter, front (15055), (except stripped chassis) Data Link Connector (DLC) (14489) |
| F2.27 | 5 | Radio (18806) (except stripped chassis) |
| F2.28 | 20 | Not used (ignition feed) |
| F2.29 | Not used | |
| F2.30 | 15 | Instrument cluster, Daytime Running Lamps (DRL) module, left headlamp (except stripped chassis), right headlamp (except stripped chassis), body builder connectors (stripped chassis) |
| F2.31 | 10 | Headlamp, right (13008), (low beam) |
| F2.32 | 20 | Power point (19N236) |
| F2.33 | 10 | Starter relay (Diesel), Digital Transmission Range (DTR) sensor (except diesel) |
| F2.34 | Not used | |
| F2.35 | Not used | |
| F2.36 | 5 | Instrument cluster, Radio (18806) (except stripped chassis), Air bag sliding contact (14A664) (except stripped chassis), function selector switch assembly, front (except stripped chassis), Modified vehicle power (modified vehicle) |
| F2.37 | Not used | |
| F2.38 | 10/15 | Not used |
| F2.39 | 10 | Multifunction switch, high mount stop lamp, dealer installed electronic brake |
| F2.40 | 20 | Power point (19N236) |
| F2.41 | 30 | Modified vehicle power |
| F2.42 | 20 a.c.b. | Front passenger window/door lock switch (with power door locks), master window/door lock/unlock switch (with power door locks) |
| F2.43 | Not used | |
| F2.44 | 20 c.b. | Wiper/washer |
| * Stripped Chassis | ||
CENTRAL JUNCTION BOX COMPONENTS LEGEND
Fusible Links
Note. For component location, see ELECTRICAL COMPONENT LOCATOR article.
Rear A/C Blower Speed Relays 1 & 2
Note. For component location, see ELECTRICAL COMPONENT LOCATOR article.