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Grand Cherokee fuses

Junction Block

WJ Junction Block (under dash, left of steering wheel)

Grand Cherokee fuses

Junction Block

Cavity Fuse Color Description
F1 -- -- Spare
F2 -- -- Spare
F3 10 Amp Red Headlight high beam left
F4 15 Amp Lt. Blue Flasher, hazard switch (see Junction Block diagram above for location of turn signal Flasher relay - Mopar p/n 4686094)

(Repair tip: WJ flasher repair)

F5 25 Amp Natural Radio amplifier
F6 15 Amp Lt. Blue Park lamps
F7 10 Amp Red Interior lights
F8 15 Amp Lt. Blue Overhead console, rear wiper, IP lights, rear flipper glass solenoid, power locks
F9 20 Amp Yellow Power outlets
F10 20 Amp Yellow Adjustable pedals (2002-2004 only)
F11 10 Amp Red Rear window defrost indicator
F12 10 Amp Red Auto shutdown relay / "Fuel"
F13 -- -- Spare
F14 10 Amp Red Headlight low, left
F15 10 Amp Red Headlight low, right
F16 10 Amp Red Headlight high, right
F17 10 Amp Red Instrument cluster, diagnostic connector
F18 30 Amp ? Trailer tow
F19 10 Amp Red Anti-lock brakes
F20 10 Amp Red Ignition Run / Heated seats / A/C Heater control / Flasher - Left and Right turn signal switch sense
F21 10 Amp Red Ignition Run / Start - PDC (Power Distribution Center)
F22 10 Amp Red Ignition Run / Start
F23 15 Amp Lt. Blue Brake switch
F24 15 Amp Lt. Blue Foglamps
F25 20 Amp Yellow Accessory delay relay (sunroof)
F26 15 Amp Lt. Blue Cigar
F27 15 Amp Lt. Blue Rear fog (export)
F28 10 Amp Red Body Control Module, Acc/Run
F29 10 Amp Red Rear wiper switch. Washer motors
F30 15 Amp Lt. Blue Radio
F31 10 Amp Red Ignition Start
F32 10 Amp Red Ignition Run / Start - Airbag
F33 10 Amp Red Ignition Run / Only - Airbag
C1 20 Amp Yellow Wiper (Circuit Breaker)
C2 20 Amp Yellow Seats (Circuit Breaker)
C3 -- -- Spare

Junction Block pinouts

Junction Block C-1

Junction Block C-1
Junction Block C-2

Junction Block C-2
Junction Block C-3

Junction Block C-3
Body Control Module pinouts

Body Control Module

PDC (Power Distribution Center, under hood)

Power Distribution Center
Power Distribution Center

Ignition off draw fuse (IOD) / Vehicle storage

The term ignition-off draw identifies a normal condition where power is being drained from the battery with the ignition switch in the Off position. The IOD connector feeds the memory and sleep mode functions for some of the electronic modules in the vehicle as well as various other accessories that require battery current when the ignition switch is in the Off position, including the clock.

The IOD connector can be used by the vehicle owner as a convenient means of reducing battery depletion when a vehicle is to be stored for periods not to exceed about twenty days (short-term storage). Simply disconnect the IOD connector from the JB receptacle slot # 15 and place it in slot # 11 (see diagram above). However, it must be remembered that disconnecting the IOD connector will not eliminate IOD, but only reduce this normal condition. When a vehicle will not be used for more than twenty days, but less than thirty days, remove the IOD fuse from the Power Distribution Center (PDC). If a vehicle will be stored for more than about thirty days, the battery negative cable should be disconnected to eliminate normal IOD; and, the battery should be tested and recharged at regular intervals during the vehicle storage period to prevent the battery from becoming discharged or damaged. Refer to Ignition-Off Draw Fuse and Battery in the index in this service manual for the location of additional service information covering the ignition-off draw fuse and the battery.

WJ flasher repair tip

The flasher is located in the Junction Block (under the dash, left of steering wheel. See diagram at very top of this page). The following repair tip was provided by "tntguy":

Look at the end of the flasher relay with the prongs sticking out. There will be 2 plastic tabs holding it together. Break or bend these back. Pull out the insides. On one side will be all the components. On the other side will be solder joints. Get a magnifying glass and inspect these joints. One or two will probably have stress cracks. Just dab a little flux on this joint and heat it with a soldering iron until it melts back together. You may need to add just a little solder. Be sure to get the pins hot and not just the solder. They need a lot of heat. Slide the relay back into its cover, dab a little super glue or tape it back together, and you're ready to go.

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