hi guys,
cayenne 2003
new alternator & starter fitted (both after market)
after alternator was fitted, car started fine, next day no crank , battery tested ok , have ignition lights , brake pedal activates gear lever ect

try and start car a couple of hours later starts no problem , (433 relay replaced)
any help would be greatly appreciated

 

forgot to mention that the starting issued happened before new starter motor was installed

 

Maybe ignition switch with wirn contact at the starting position.