obd stopped working

[cliosport-carl]

Plugged my car in today all was good it came up with peddle broken or to that effect took it all off changed said peddle then plugged back in and nothing at all reader won't fire at all tested it on another car and it works fine I'm lost iv checked fuses so ? Any help please and I did have a search but nothing

 

[Ianboom]

Swap the pedal back over and retry it??

 

[Ian_s]

I had this once, clip wouldn't connect. A mess around with the uch connections sorted it.

 

[cliosport-carl]

It's ok It was the reader wire is a bit funny and I must have had it right every other time