just run your own power lead from the batt to your deck (if its the constant on power lead at fault{not likely} ) or ...splice into your sig./access. sockett for the pos. (switched) power source to your deck. i had to do the latter once...it worked pefectly that way and still left power to the sockett for accessories
accesory only socketts only... (usually are) an always on power source ie;non switched power source....hope this helps.....trip