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I have a 2005 grand caravan 3.8 high mileage the instrument cluster is not coming on no odm no PRND nothing with the key on but the turn singal and four ways still work and it runs and drives fine

Not working
instrument cluster
Windshield wipers

Tried
Resetting cluster
Codes e100.2 100.4 100.6
Unhooked battery 30 min plus
Checked wires under fuse box
Switched fuses and realys
Took apart cluster didn't see any cracks in sorlder
Wiggled wire on cluster bcm and fuse box
Scan tool says no module communication so don't know p codes
Charged battery
Cleaned cables

I'm leaning towards the bcm but I not sure
And I looked up the codes there all communication codes
 

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that sounds like a communication issue on the PCI bus itself....most of the dash is controlled by the PCI bus, however the green arrows are dedicated...
windshield wipers are also PCI bus....
are there any other electrical anomalies?

Dumb question - does your van have the sentry key?
 

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I am thinking more of a wiring issue....what you describe is definitely communications related...and a lot of the functions on these vans are PCI dependent....If the bus were dead, it would not run...the fact that you can drive it says the bus is communicating somewhere...and the bus is controlled by the BCM
 
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