What the heck is this Thingy? Warner?

Found this in the back seat of my parts car. Its a spring loaded level that says Warner on it. Appears to have some electrical terminals on the back? Any ideas what its for?/ off of?

 

Old electric brake controller?

 

Yep, trailer brake controller.......

 

Pretty sure you have an early pacemaker. Probably belongs to one of the old timers here.

 

Dick Cheney called, he wants his pacemaker back........

 

I totally agree, it is an ealy brake control for the electric brakes on a travel trailer.
George

 

"...you have an early pacemaker..." Yep. Controlled a Model T coil fed by a motorcyle battery, mounted in a special top hat. Generally worked fine, but if anything went wrong no one could approach the victim for further first aid or burial for 3 or 4 days, til the battery ran down.
Yours is missing the ground wire.

 

Used to belong to this fellow named Joseph Warner.