the two wires maybe add on side light wires that have been removed,took the pos and neg from the sidelight!
i did an autopsy on my parking pole as like yours my one made all the noises but no light etc.
the motor you can hear rotates a drum containing the wire for the bulb,that is threaded up a plastic hollow tube which is strong enough to push up the mast but soft enough to curl round the drum,my pipe had brocken in about 4 places,so would not push up the mast,when coming down the wire still rotates around the drum and rips it from the bulb,
a brain surgeon would be handy,with them glasses too
hope this helps.