Brake booster?????

[1971Series88]

Hi all, below picture is of a "WARNER ELECTRICAL" part attached to my Series IIa...It is connected to:

a) The battery power
b) The brake fluid lines

Is it a booster or something?? The front part - wood grain looking sticker - is some type of push in switch?

Anyone know anything?

[bkreutz]

My guess would be a trailer brake controller

[1971Series88]

Yeah -I think you are right. A wire comes out of it and goes all the way to the rear. Weird though having it hooked up to the brake lines? There is no brake line coming out of the controller, and going to the rear of the truck

[bkreutz]

Senses pressure when you apply the foot brake, then activates electric trailer brakes. The button on the front is to activate the electric trailer brakes without applying the hydraulics.

[1971Series88]

wow - they had this stuff back then!! I have no idea how to test it as my trailers don't have electric brakes. I was gonna disconnect and uninstall it - but guess I will just leave it.