hp18racer

I have an old AMB transponder, the two wires are blue and brown. Can anyone tell me which is + and which is -?

Kurt R

As wrong as it sounds, brown is +

hp18racer

Brown to + gives me a green light on the transponder.

Thank You

Bill L Seifert

I always thought that brown was universal ground. But in this case it ain't. When I changed cars, brown to ground, and no transponder. Brown to + and it worked.

Bill Seifert
1999 Honda Civic SI race car
944S is gone, I think

Gary R.

Green = good.