I'm having trouble establishing a connection between the scantool and my 2002 Chevy Avalanche. When you connect it, the green lights don't cycle like it is supposed to.
First, I thought it was a defective cable but I tried it on my friends 2008 Lexus IS and it works fine. So, the next choice is that my OBDII connector is bad. The thing is though, I took my truck to AAMCO about a week back and they were able to read the trouble codes just fine. I suppose that connector could have gone bad in that time but I think it is highly unlikely.
Does anyone know why this might be the case?