i was doing rear brakes on this bus o its a gas bus as well i was doing rear brakes on this bus and when i pressed the pistons bck in the caliper the back up brake pump kicked on and now it wont shut off if i unplug the pressure switch thats in the line the motor shuts off anyone seen this before it was fine bedore the bus came in but it started doing this y i was pressing piston back in i thought i was switch on master i swapped it out and everything was good i took for ride came back shut of f and motor continued to run again
It has happened to mine one of ours. Try wiggling the brake switch on the pedal. Ours hangs up sometimes. I removed it, cleaned and lubed with some silicone spray. Has been good ever since.