MY truck radio used to stay on after I remove the key. It turns off after i open the door. Its not working now. Is there away i turn it back on? Please help

 

Take it to the dealer and pay the BIG BUCKS, $100 plus, to have them reset it. Can't say it is worth it though.

 

what kind of rover...???

 

The door jamb switch (most often) works by just simply completing a ground circuit for the interior lights when the door opens, the only thing I can think of is your radio is grounded to that circuit which seems unlikely but you could try to just ground the radio directly to chassis ground.