yesterday i had a overhead Tv installed in my wife 2000 VX and now the alarm will not work it just make one long beep sound. They had to remove the overhead dome light to install the tv would this effect the alarm? they told me to take it to the dealership and they would foot the bill ,but If someone on here can tell me how to fix it I would greatly appricate it. then I can take it back to the people who installed it and have them fix it

also what does everyone use to clean and wax there vehical?
I do not want to discolor her vehicross so I thought I would ask what is the best stuff to use


Thanks
Robert