Question about 1996 Jeep Grand Cherokee

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Code 1850 no message from BCM 1996 jeep grand cherokee

Fuses and relays ok.

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  • help please Nov 01, 2012

     also scanner reads no ccdl J1850 no message fromBCM- p-1695 please help with this nobody has a clue what to do.  no spark, no fuel,  new pickup in dist, new fuel pump, fuses ok.

  • help please Jan 04, 2013

    HI again, I'm wondering where I could get a good BCM and a good Pcm cheap. the prices around here are very high. thanks

  • help please Jan 07, 2013

    The gauges will work if the jeep would start. They move like normal when the key is turned on.

  • help please Mar 15, 2013

    where are the grounds for the computers? or what color is the ground wire or wires and where do they ground at?

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Dashlights out/running lights out 1996 Jeep Grand Cherokee Replaced headlight switch no luck all fuses are good too


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Where the window relay is located in a 2003 jeep grand cherokee?


relay, way assume there is one?
did you SCAN it yet ? got PCI comm errors. or door module errors?
why not post symptoms and ask for help.
that works not guessing... in 99% of all cases.

WJ jeep covers all this in the FSM book, or at alldata.com
ending the guessing game. fast.
chapter 8 is wiring in the jeep book.
next is power window . 8N- page 33 is there. theory of ops.

are all windows dead, or just one, must I ask>?
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it has 2 modules
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now the bad news.
the BCM brain, sees what buttons you press, then the BCM
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(that is how it all works with min words)
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now on page 4 they show RHD and export models with no brain
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BCM top left
PCI bus below it.
driver door module getting commands. (serial)
look ma' no switches or relays. (usa cars)

24778773-ylqjikjamog5a0is5ho2uz3h-1-0.jpg what is inside the module is a jeep secret.

the BCM does the magic where by you command driver window down and it does so automatically. this is software doing that in the BCM. a big clue if your jeep has this BCM system. show above.

ill now quote the FSM book
The most reliable, efficient, and accurate means to
diagnose the power window system requires the use
of a DRB scan tool and the proper Diagnostic Procedures
manual. The DRB scan tool can provide confirmation
that the PCI data bus is functional, that all
of the electronic modules are sending and receiving
the proper messages on the PCI data bus
, and that
the power window motors are being sent the proper
hard wired outputs by the door modules for them to
perform their power window system functions.


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Download From Internet ...Go to Google.com and Type Exemple
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Check in the Fuse Block, the cavity 2, fuse 30 Amp c/Brkr (Section (8W Page 7)

More details about electrical system for ZJ Grand Cherokee, you can find here: ZJ-Secc-8W-Wiring-Diagrams

I hope help you with this (rated this help). Good luck.

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1 Answer

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Let me know if this works for you?

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1 Answer

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hi there;
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