How to wire up 01 Lincoln Ls V8 Rear Spoiler

luckycaliluckycali Member Posts: 17
Bought a rear spoiler for my 01 Ls. Im trying to hook it up but when I tap in to the brake light wire's with my test light it turns in to negative when i press on the brake pedal and positive when I depress the brake pedal also it has 3 wire going in to the light buld socket try all wire and came up with nothing. How would I hook it up is my question?
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