32 ft Thor motorhome 2010 era... here are some symptoms on a malfunctioning slide....with at least 13.5 volts on the batts it moves but not fully, the motor can be heard sometimes but not others.After a try the voltage goes down to 12.5 aprox. Does this sound like a bad slide actuator? Is it hard to get into the actuators and test them somehow..? One of the slides is a shallow one anyway and goes only about 2 ft out but that's full out....the other one won't even go out but a few inches. But more importantly they don't go in...is there a way to manually get them in???thanks