My power radio antenna did not work so I put a new Delco power antenna unit in my 1989 convertable. When I turned on the power the antenna went up but will not come back down. I noticed a relay looking box, where you plug in the connectors from the antenna and the car wiring. I see there are three wires ground, power up, and power down, i suppose. My question is could this little box be bad? Does anybody have any ideas what could be the problem? Is this like a limit switch to shut off power when the antenna is all up or down? Also put new door window rubbers on doors, and now my right hand door light will not go off.