When i had my exhaust installed some idiot disconnected the exhaust sensor but no one seems to know which wires go where, there are four loose wires.

Does anyone know where i can find a wiring diagram.

or how to connect one

 

If the wires are completely loose (without any plug), then they've probably ripped out of the O2 sensor or the plug, in which case you'll need to perform some repairs on them.