What causes power drain. I can pull JB Power #15 - 50 amp fuse and the drain goes away. When fuse is pull there is no radio or heat. Has ATC
2003 jeep GC, or WJ jeep, it is..?
there are no 50a fuses in any JB,
there are just 4 in the PDC. engine bay.
so, JB is wrong, input to me.
ill assume F15 is correct, and not F3/7/12 in PDC
F15 feeds JB via a pink wire. (pk-wt)
this main F15 feed JB , F5,7,8,9 fuse in cab.
so pull fuse 5 to 9 there and the one that ends the drain
is the load that is leaking, (phantom drains)
easy, huh, just 4 fuse to pull.
Cab box, only. called JB on all jeeps.
jb fuse 5 is radio.
jb fuse 7 is HVAC zone control (heat?) skim mod. & auto head lamp sensor & BCM memory, (yes lots)
jb fuse 8 is (12 courtesy lamps , intrusion module(export) and VICS, vehicle info center(memory)
jb fuse 9, front12vdc power outlets (cig ports modern) Cell Phone arked there?
or login at alldata.com and see all that, in the wiring pages.
MOST HELPFUL THING IVE EVER READ ON JEEP FORUM, IVE BEEN TRACING THE EXACT CIRCUIT FROM PDC TRYING TO FIGURE OUT WHAT PB POWER IS. ALL FOUR OF MY JB POWER 50 AMP CIRCUITS ARE MAKE MY CIRCUIT TESTER LIGHT UP, I THOUGHT IT WAS A BAD GROUND SO I CLEANED ALL MY GROUNDS TERMINALS AROUND THE BODY OF THE CAR. IT ALLOWED THE CAR TO START BUT I STILL HAVE ALL THOSE OPEN CIRCUITS.
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SOURCE: i have a 96 jeep gand cherokee, 8 cylinder. the
Sounds like the problem is in your radio,unplug it for a few days to confirm.
SOURCE: I have a slow battery drain on a 2006 Jeep
Hi
Welcome
Jb power is Junction Block power
Here is a list of tests for this problom
IGNITION-OFF DRAW TEST
The term Ignition-Off Draw (IOD) identifies a normal condition where power is being drained from the battery with the ignition switch in the Off position. A normal vehicle electrical system will draw from five to thirty-five milliamperes (0.005 to 0.035 ampere) with the ignition switch in the Off position, and all non-ignition controlled circuits in proper working order. Up to thirty-five milliamperes are needed to enable the memory functions for the Powertrain Control Module (PCM), digital clock, electronically tuned radio, and other modules which may vary with the vehicle equipment.
A vehicle that has not been operated for approximately twenty days, may discharge the battery to an inadequate level. When a vehicle will not be used for twenty days or more (stored), remove the IOD fuse from the Junction Block (JB). This will reduce battery discharging.
Excessive IOD can be caused by:
If the IOD is over thirty-five milliamperes, the problem must be found and corrected before replacing a battery. In most cases, the battery can be charged and returned to service after the excessive IOD condition has been corrected.
1.
Verify that all electrical accessories are off. Turn off all lamps, remove the ignition key, and close all doors. If the vehicle is equipped with an illuminated entry system or an electronically tuned radio, allow the electronic timer function of these systems to automatically shut off (time out). This may take up to three minutes. See the Electronic Module Ignition-Off Draw Table for more information.
ELECTRONIC MODULE IGNITION-OFF DRAW (IOD) TABLE
Module
Time Out?
(If Yes, Interval And Wake-Up Input)
IOD
IOD After Time Out
Radio
No
1 to 3 milliamperes
N/A
Audio Power Amplifier
No
up to 1 milliampere
N/A
Central Timer Module (CTM)
No
4.75 milliamperes (max.)
N/A
Powertrain Control Module (PCM)
No
0.95 milliampere
N/A
ElectroMechanical Instrument Cluster (EMIC)
No
0.44 milliampere
N/A
Combination Flasher
No
0.08 milliampere
N/A
2.
Determine that the underhood lamp is operating properly, then disconnect the lamp wire harness connector or remove the lamp bulb.
3.
Disconnect the battery negative cable.
4.
Set an electronic digital multi-meter to its highest amperage scale. Connect the multi-meter between the disconnected battery negative cable terminal clamp and the battery negative terminal post. Make sure that the doors remain closed so that the illuminated entry system is not activated. The multi-meter amperage reading may remain high for up to three minutes, or may not give any reading at all while set in the highest amperage scale, depending upon the electrical equipment in the vehicle. The multi-meter leads must be securely clamped to the battery negative cable terminal clamp and the battery negative terminal post. If continuity between the battery negative terminal post and the negative cable terminal clamp is lost during any part of the IOD test, the electronic timer function will be activated and all of the tests will have to be repeated.
5.
After about three minutes, the high-amperage IOD reading on the multi-meter should become very low or nonexistent, depending upon the electrical equipment in the vehicle. If the amperage reading remains high, remove and replace each fuse in the Power Distribution Center (PDC) , one at a time until the amperage reading becomes very low, or nonexistent. (Refer to 04 - Vehicle Quick Reference/Fuse Locations and Types - Specifications) for the appropriate wiring information for complete PDC and TIPM fuse, circuit breaker, and circuit identification. This will isolate each circuit and identify the circuit that is the source of the high-amperage IOD. If the amperage reading remains high after removing and replacing each fuse and circuit breaker, disconnect the wire harness from the generator. If the amperage reading now becomes very low or nonexistent, diagnose and repair the Charging System as necessary. After the high-amperage IOD has been corrected, switch the multi-meter to progressively lower amperage scales and, if necessary, repeat the fuse and circuit breaker remove-and-replace process to identify and correct all sources of excessive IOD. It is now safe to select the lowest milliampere scale of the multi-meter to check the low-amperage IOD.
CAUTION:
Do not open any doors, or turn on any electrical accessories with the lowest milliampere scale selected, or the multi-meter may be damaged.
6.
Observe the multi-meter reading. The low-amperage IOD should not exceed thirty-five milliamperes (0.035 ampere). If the current draw exceeds thirty-five milliamperes, isolate each circuit using the fuse and circuit breaker remove-and-replace process in Step #5 . The multi-meter reading will drop to within the acceptable limit when the source of the excessive current draw is disconnected. Repair this circuit as required; whether a wiring short, incorrect switch adjustment, or an inoperative component is the cause.
SOURCE: jb power fuse drains battery
The JB fuse under the hood is the power supply for the fuse box inside of the vehicle, if the battery drain goes away when JB fuse is removed is only because you have isolated the interior from the rest of the vehicle. These vehicles have issues with the body harness connector on the drivers side floor. To access the connector remove the rear seat and pull back the carpet, the connector is located directly below the drivers side rear seat bottom. Unscrew the 10mm bolt that holds the connector halves together and inspect for corrosion. If corrosion is present, repair as needed and your battery drain should go away.
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Hi Gary McNeill, I want to help you with your question, but I need more information from you. Can you please add details in the comment box?hi, can you describe the power drain for me? please be specific and tell me everything you know about it- has car been worked on before- when issue happened- started when?
Me absorbe. La carga de la bateria en dos dias y mire k le quito el jb 50amp y se apaga la luz de mi probador k puse en el negativo conectado en el poste asia la clampa
Mi auto es gran cheroke laredo 2001todo empezo cuando perdi el control de la alarma ise todo manuel para que no se istalara la alrma ahora comenzo a descargarme mi bateria en dos dias probamos con un probador trabajando en el negativo y comense a quitar todos los fuses interiore y loes que llevan enseguida de la bateria cuando le quite el jb 50 amp. Se apagago la luz de mi probador. Cual es el siguiente paso k tengo k aser
WHY NOT USE ENGLISH, WE ARE USA FORUM SO?
BUT THIS DOES NOT COMPUTE
WHAT IS THE SYMPTOMS FIRST.?????
My car is great Cherokee laredo 2001 all started when I lost control of the alarm ise all ManuAl so I will not get the alarm now I started to unload my battery in two days we tried with a tester working on the negative and commence to remove all fuses interior And loes that lead immediately from the battery when you remove the jb 50 amp. I turned off the light on my tester. What is the next step k I have k aser
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