Today I placed the Brake Buddy in the car on the passenger side, plugged into the cigarette light and then took a ride. The purpose of this ride was to determine if the inertia switch was working.
In a vacant lot I made several hard stops and the inertia switch activated and the am on the Brake Buddy extended. I then adjusted the Brake Buddy sensitivity and made more hard stops. All worked well.
So now I'll wait till our next trip to see if the Brake Buddy works when the car is in tow. That trip will not take place till Spring since we are no in Florida for the winter.
Thanks again to everyone for your help & comments.