sony explode wiring info

i have a 1985 Saab 900 S and i put a sony explode in the car. It had to be hardwired in because i dont have the adapter. The radio works fine except when i turn the car off the radio resets like the battery got disconnected. The time, radio stations, and everything is like when the radio was first installed. I know something is wired wrong but i cant figure out what. Please help me figure out how to wire it correctly.Sean

   Hook the gray wire of your factory harness to your constant 12v of your radio...of course i recomend testing first with a dmm, if you have access to one....Also hook the red wire of your factory harness to your switched wire of your radio....again if you have access to a dmm I  would recomend using it..

i've done that but the radio still resets to factory settings when the car turns off.  is there anything else that could be wired wrong.Sean

    Do what joch1314 stated above..If problem still exists have your battery checked.