Indicator lamps

Hello together, at the Clio of my junior two warning lights shine, which is one for the handbrake – only what does the STOP light want to tell me exactly? (Handbrake is not dressed and the B. liquid tank is full.) The ABS control does not glow at all (even not 3 sec. after switching on the ignition). However, the previous owner changed the speedometer unit (my guess) … however, I am not sure … and possibly wrongly wired or possibly not compatible. I am currently not getting any further and so I don’t need to be seen at the TÜV either.