Jonathan Yarden
Power distribution box
Locate the power distribution box in the engine compartment. It has high-current fuses that protect your vehicle’s main electrical systems from overloads.
| Fuse or relay | Ampere rating [A] | Protected components |
| 1 | 5* | Power brake assist module – Hydromax |
| 2 | 10* | Air conditioning compressor clutch |
| 3 | 20* | Air conditioning clutch relay coil. Catalyst monitor sensor. Engine heated exhaust gas oxygen sensor #11 and #21. Mass air flow sensor with intake air temperature. Vapor management valve |
| 4 | 5* | Powertrain control module memory. Powertrain control module relay coil |
| 5 | 20* | Powertrain control module power |
| 6 | 20* | Instrument panel dimmer module. Instrument panel fuse #41. Park lamp feeds. Trailer tow running lamp relay coil |
| 7 | 20* | Ignition coils. Radio capacitors |
| 8 | 30* | Hydromax – Anti-lock brake system module |
| 9 | 10* | Powertrain control module. Starter ground relay coil. Starter main relay coil |
| 10 | 20* | Daytime running lamps |
| 11 | 20* | Fuel pump relay coil. Powertrain control module power |
| 12 | 25* | Instrument panel – backup lamp feed. Trailer tow back-up lamps feed |
| 13 | 30** | Trailer tow electric brake controller feed |
| 14 | 60** | Instrument panel battery feed (fuse #9, 15, 21). Lighting primary fuse |
| 15 | 20** | Trailer tow park lamps |
| 16 | 60** | Anti-lock brake system module – Hydromax |
| 40** | Anti-lock brake system module – Hydroboost | |
| 17 | 20** | Horn feed |
| 18 | 20** | Backup lamp feed. Tow/haul switch. Transmission control indicator light |
| 19 | — | Not used |
| 20 | 30** | Powertrain control module relay coil. Powertrain control module relay (Power distribution box fuses # 3, 5, 7, 18) |
| 21 | 20** | Fuel injectors. Fuel pump motor |
| 22 | 20** | Cigar lighter feed. Diagnostic tool connector |
| 23 | 40** | Blower motor feed |
| 24 | 50** | Instrument panel battery feed (fuses #4, 10, 16, 22) |
| 25 | 40** | Ignition switch feed (Instrument panel fuses #1, 5, 7, 11, 13, 14, 17, 19, 23; Power distribution box fuses #9, 11) |
| 26 | 40** | Ignition switch feed (Instrument panel fuses #5, 11, 17, 23, 26, 38) |
| 27 | 30** | Multi-function switch (headlamps) |
| 28 | 30** | Starter solenoid |
| 29 | 60** | Power brake assist motor – Hydromax |
| 40** | Anti-lock brake system module – Hydroboost | |
| R1 | — | Air conditioning clutch relay |
| R2 | — | Fuel pump relay |
| R3 | — | Horn relay |
| R4 | — | Starter relay |
| R5 | — | Blower motor relay |
| R6 | — | Powertrain control module relay |
| Diode 1 | — | Fuel pump diode |
| Diode 2 | — | Air conditioning clutch diode |
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*Mini fuses.
**Maxi fuses.
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UPS Power distribution box 1
| Fuse or relay | Ampere rating [A] | Protected components |
| R1 | Relay | Powertrain control module |
| R2 | Relay | Daytime running lamps |
| R3 | Relay | Starter motor |
| R4 | Relay | Blower motor |
| R5 | Relay | Horn |
| R6 | Relay | Fuel pump |
| R7 | Relay | Starter ground |
| R8 | Relay | Trailer tow parking lamps |
| R9 | Relay | Back-up lamps |
| R10 | Relay | Not used |
| R11 | Relay | Not used |
| R12 | Relay | Air conditioning |
| M1-1 | 10 | Hydromax brake on/off relay |
| M1-2 | — | Not used |
| M1-3 | — | Not used |
| M1-4 | — | Not used |
UPS Power distribution box 2
| Fuse or relay | Ampere rating [A] | Protected components |
| M1 | 25* | Back-up lamps |
| M2 | 20* | Daytime running lamps |
| M3 | 30* | 4–channel anti-lock brake system module (Hydromax) |
| M4 | 20* | Powertrain control module run/start. Fuel pump relay coil |
| M5 | 10* | Starter relay coil |
| M6 | 20* | Vehicle power 4 |
| M7 | 5* | Hydromax motor monitor |
| M8 | 20* | Vehicle power 2 |
| M9 | 20* | Vehicle power 1 |
| M10 | 10* | Air conditioning |
| M11 | 5* | Powertrain control module relay keep alive power |
| M12 | 20* | Parking lamps |
| D1 | Diode | One-touch start |
| D2 | Diode | Fuel pump |
| D3 | Diode | Air conditioning |
| R2-1 | — | Not used |
| J1 | 30** | Powertrain control module vehicle power |
| J2 | 20** | Fuel pump |
| J3 | 20** | Cigar lighter power point. Diagnostic connector |
| J4 | 40** | Blower motor |
| J5 | 30** | Headlamps |
| J6 | 40** | Ignition switch feeds |
| J7 | 40** | Ignition switch feeds |
| J8 | 50** | Instrument panel fuse box |
| J9 | 30** | Starter motor solenoid |
| J10 | 40** | 3–channel anti-lock brake system modul |
| 60** | 4–channel anti-lock brake system module (Hydromax) | |
| J11 | 30** | Trailer tow electronic brake |
| J12 | 60** | Lighting |
| J13 | 20** | Vehicle power 3 |
| J14 | 20** | Horn |
| J15 | 20** | 3–channel anti-lock brake system module |
| 60** | 4–channel anti-lock brake system module | |
| J16 | 20** | Trailer tow parking lamps |
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*Mini fuse.
**J-case fuse.
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Diode and relay module
Locate the module box with the power distribution box in from of the radiator.
| Relay location | Protected components |
| 1 | One-touch integrated start (ATO diode) |
| 2 | Not used |
| 3 | Not used |
| 4 | Daytime running lamps power relay |
| 5 | Hydromax – brake on/off signal isolating relay |
| 6 | Reverse lamps relay |
| 7 | Starter ground relay |
| 8 | Trailer tow parking lamps relay |
Fuse holder module
Locate the fuse holder next to the diode and relay module.
| Fuse | Ampere rating [A] | Protected components |
| 1 | 10 | Hydromax – brake on/off signal |
Passenger compartment fuse panel
Locate this fuse panel below and to the left of the steering wheel near the brake pedal. Remove the panel cover to access the fuses.
| Fuse or relay | Ampere rating [A] | Protected components |
| 1 | 20 | Body builder battery (+12V) feed |
| 2 | 20 | Flasher run |
| 3 | 15 | Left turn |
| 4 | 15 | Blower relay coil |
| 5 | 15 | Right turn |
| 6 | 10 | ABS run |
| 7 | 10 | Body builder headlamp |
| 8 | 5 | Daytime running lamps |
| 9 | 10 | Body builder headlamp |
| 10 | — | Not used |
| 11 | 10 | Cluster battery (+12V) #1 |
| 12 | 5 | UPS BTSI |
| 13 | 10 | Cluster battery (+12V) #2 |
| 14 | 10 | Switch illumination |
| 15 | 20 | Body builder battery (+12V) feed |
| 16 | — | Not used |
| 17 | 20 | Trailer tow run |
| 18 | 10 | Body builder run |
| 19 | 10 | Brake lamp feed |
| 20 | 10 | Body builder run |
| 21 | 10 | R/S |
| 22 | 30 | Wiper module battery (+12V) |
| 23 | 10 | Reverse lamps |
| 24 | 5 | Body builder radio |
| 25 | 10 | Trailer tow reverse lamps |
| 26 | 10 | Cluster R/S |
| 27 | 20 | Daytime running lamps |
| Relay 1 | — | Daytime running lamps. Parking brake |
| Relay 2 | — | Daytime running lamps on/off |
| Relay 3 | — | Right-hand direction indicator |
| Relay 4 | — | Trailer tow right-hand direction indicator |
| Relay 5 | — | Left-hand direction indicator |
| Relay 6 | — | Trailer tow left-hand direction indicator |
| Relay 7 | — | Not used |
| Relay 8 | — | Not used |
| Relay 9 | — | Not used |
| Diode 1 | — | Not used |
| Diode 2 | — | Not used |
| Diode 3 | — | Not used |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.