[Spridgets] Warning!! LBC Content!! Delete Now!!

[derf]

Yeah, it sounds like you got a brake light switch, (some were hydraulically
operated) when you wanted that warning light device.  Get in touch with
Peter C and see if that part is available.  Paul A and Ed at JB can also
source it for you.
You should have a mechanical brake light switch on the pedal box or a
hydraulic switch somewhere on the lines.  The one wire thing on the 4 way
hydraulic block is for the failure indicator light.
Cheers,
Derf