Arduino Mega with ELM327

So I purchased one of those cheap cloned ELM327 with USB. I was to connect it to the Arduino Mega using Serial 1 but I can't seem to establish connection.

I have wires from Pin 17,18 on the PIC to 19,18 on the Arduino.

Not sure if anyone has problems trying to connect it this way. I've tried different things and now I am thinking if I need to remove the USB to UART Bridge to get it working.

Any suggestions or sample code I should try?