[fritz]

Why would it do that while I was engine braking though?

The way you test to see if the vss is working is to see if the CEL light comes on during engine breaking. In my crx the screw connection on the back of the cluster came loose and I got a CEL. Maybe that's the only way it can tell that you are not sitting still revving the engine

According to the manual you need to jack up the front wheels and rotate the front left tire to see if the voltage pulses between 0 and 5 Volts with the meter
on b10 yellow/blue and ground at the ecu. If your speedo is working then the vss is working and you must have a bad wire. Run an new wire from the supermid to the ecu?

The attachment is from the crx mpfi manual so it uses a different connection at the ecu for obd0