2000 Mustang V6 wont start

Shift1

New Member
Dec 14, 2018
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Hello, my car was running fine and I was lazy so I disconnected my battery to clear my ECM codes as I have done before. When I plugged the battery back in the odometer showed all dashes, the security light came on and now it only cranks. The OBD2 port also doesn't seem to work anymore. I should mention that the car is tuned with a SCT tuner and it has a tune that allows the car to turn on without a chip key. Any help is appreciated. Thanks
 
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wmburns

SN Certified Technician
Aug 14, 2009
5,807
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Houston Texas
There's a heavy ground wire that runs from the radiator core support around the battery. This goes to a round single pin connector. This is the PCM and CCRM ground. If this connector is accidentally disconnected this would CAUSE your exact symptom.

Here's some more information.

1996+ Crank with no start check list
 
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