[Acoop]

Hi. I just installed a jb4 into my 2008 335xi and everything worked, Bluetooth connected and I could adjust settings. But everytime I attempt to start the car, it just cranks and doesn't turn over. I bought the jb4 used. Any help would be great. Thanks.

Also thought to add that sometimes there is a loud whining in the front of the car. The car was working perfectly before this (around 3 hours ago).

[Rob09msport]

Originally Posted by Acoop

Hi. I just installed a jb4 into my 2008 335xi and everything worked, Bluetooth connected and I could adjust settings. But everytime I attempt to start the car, it just cranks and doesn't turn over. I bought the jb4 used. Any help would be great. Thanks.

Also thought to add that sometimes there is a loud whining in the front of the car. The car was working perfectly before this (around 3 hours ago).

Set jb4 to map 0 then try. If that doesnt work check harness connections if they are good remove it.

[Acoop]

Originally Posted by Rob09msport

Set jb4 to map 0 then try. If that doesnt work check harness connections if they are good remove it.

I set it to map 0, still just cranks and doesn't start. All my connections seem good too. I am getting 12.1 volts through the entire jb4, no idea why its not working.

[Fuel-It!]

Usually means something is plugged in backwards or not seated properly. Post photos of the install if you want help.