My 2006 Volvo S40 just shut off on me while I was driving down the road, as I got off to investigate why this happened I realized there was nothing that caught my attention so all I did was I messed with the positive terminal and I got it to start to get it back to my house as I pulled up I shut it off and when I tried to take the key out the key was stuck so automatically I was thinking it's a battery issue since this has happened to me previously on my other Volvo S40 as Iooked under the hood nothing caught my attention so I ended up using a multimeter checking the battery voltage which was good at a 12.8 reading with the car shut off which was strange because the key was stuck .I did a multimeter test with the alternator to determine that was good. So I used a smart jump started and still nothing !! I have no power inside the car at all but I have 12 volts running under the hood one positive wire goes from battery to starter and the other positive goes to alternator which is all good idk what to do !!! I checked all my fuses and relay under the hood and under passenger dash board and there all good!! I feel as if someone has a kill switch on my car it's ridiculous how bad these cars are electrical wise idk wtf to do can anyone help me