Quote:
Originally Posted by Thomas97
I have a skoolie and I installed a lift. I've also worked on commercial buses with lifts. Some info you received is spot on. Three wires from the ignition, one is power to the key (ignition), two is power from the key after the key is turned on(ACC). The third is power to the starter solenoid after the key is turned further. Back to the 2nd wire (ACC) this wire runs everything including the lift. The branch of ACC that goes to the lift has 2 maybe 3 and maybe even 4 interlock relays. For the relays to allow the current through them, they each must complete a task (i.e. the brake is on or in neutral or the flashers are on, etc)..
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I’m having problems with the opposite of the IP, to preface I have a 2002 Thomas 3800 with a handicap side door and wheel lift.
I took the wheel lift out and I’m in the process of taking all of the unnecessary wiring out to include all the switches/wires for the handicap door and the emergency door.
Just like any other bus after I cut all the wires that I needed too my.l bus wouldn’t start. I bypassed the ignition interlock to the emergency door and she cranked right up. BUT I am unable to release the air brakes now due to what I suspect another interlock possibly having to do with the handicap door. Am I on the right path?
To add to my suspicion on the engine bay side of the fire wall where the hoses come off of the air brake release there is a solenoid on one of the hoses that I suspect may have something to do with my problem because I traced the electrical wire back to the fuse box and it goes to a cube relay.