2007 cayman s
Hello all I am having issue with my 2007 cayman s. This all started after replace the old battery which was barely working. I did not connect the leads backwards. No crank when trying to start instrument cluster comes on, lights come on, radio, all electronics work. The following faults Brake malfunction, psm malfunction, depress clutch are shown on the dash.car will not allow me to read any codes unless I remove the cables and start the car bit then it reads clean no codes. I’ve done some digging and have tried the following remedies, removed starter and tested it (passed), test the alternator(passed), bad new battery(12.6v). Tested all the fuses(none blown). I’ve checked the immobilizer no damage that I can see. Car recognizes the key begin used. The clutch switch has been replaced. All relays are good not burnt tested good. I’ve taken the positive cable stud on the distributor out there was rust on it I cleaned it off, the cable end going to the battery had some rust aswell I have clean that to the best of my ability as well. I am going to put the car back together and try and take it to a indie to see if they can find the problem. I just wanted to see if any of you fine folk might have any clue what’s happening. I look forward to your replies.