Headlight and tial light not working after removing police switches

If I remember correctly, the factory lights are still separate from the wigwag lights. Once the light controller is removed the factory light switch should still operate like normal. You might need to repair the wiring where the light controller was tapped into the lighting, but just like the headlights operating when the unit was a patrol vehicle.

Brake switch not working

Sounds like an aftermarket alarm system.

first tern on hazerd light if that work,s it my be brack light switch .be shour fuss is good .

The head light controls on a police car are exactly like those on any other Crown Vic. I have repaired dozens of them. More than likely you have no contact inside the multifunction switch. I would replace the switch as the most likely source of the problem. These are easy to change, just remove both halves of the plastic cover around the steering column and there are two Torx (also called star screws) screws holding the switch onto the column. The screws are on the bottom down in wells of the lower calm shell cover, they are cross points (Phillips)
This is a fairly common failure on police cars (P71 and P73 option).

Replace the headlight switch
That is the last item to be bad unless the wiring is disconnected..

there's a button on the right side of the steering wheel that says serv push that button. It's put right there for when they use them as police cars you can cut the headlights off. You will probably notice that dash lights are on.

It needs a new headlight switch assembly. A parts worn out inside. The approx. cost for a new one is abot $160.00. Sorry.

if you have the circuit board type rear lights the circuits inside will brake and cross eachother that will cause your problem

I have an 2004 impala and every now and then it would lose the headlights for a couple of seconds and they would come back on. I finally replace the headlight switch and the problem went away. A switch, if I remember right, was about $500.