Hey y’all , so i bought an 2015 Nissan Altima Sv with 50k miles off auction as I’m a wholesaler . I bought this car off from Nissan in riverside California . The car was listed as as is and transmission inop . So I bought the car thinking it was transmission but however when the car arrived , it seemed to be transmission as the car didn’t accelerate. Upon more digging we found out that there was a lot of plug disconnected . Like the cams sensors , the oxygen 02 , and the transmissions one to as I plugged them all in , the transmission connections where disconnected as well . As I connected all the plugs and from the harness the car now the car won’t shut off and has to be forced to be shut down . The transmission also whines as I connected the missing connections from the harness . I guess the dealer already messed with the car . I’m thinking it’s the bcm because the driver side window doesn’t seem to roll up. What do you guys think is the problem? I bought an bcm and a ecm off eBay with a key . Do you think that would solve my problem ??or something else ?