brake light indicator on after installing strange hydraulic brake booster

[DGC]

replaced original master cylinder with a strange hydraulic booster. after driving for ~20 minutes, brake warning light illuminates. event is surprisingly reproduceable. suspect original wiring needs to be properly connected. suggestions for what to connect where would be appreciated.

thanks,
dgc

 

[captndave737]

Not sure how you replace a master cylinder with a brake booster.

 

[TexasT]

Pix needed. Not sure what op has going on.

 

[Chuck Leeper]

Pix needed. Not sure what op has going on.

Sounds like the op needs to find someone locally, that can help.....

 

[ravege]

The Brake light is ground switched. 4 things can trigger the Brake light: the parking brake, the bulb test when starting, the brake distribution/prop block (triggers low brake line PSI) and the Powermaster switch. It sounds like you tossed the Powermaster, how did you clean up its wiring? Are your new brakes working fine? If not, the block might be triggering low PSI. Basically, one of your wires is shorting to ground. That it is repeatable every 20 minutes is odd.