No backup lights or alarm

[Sir Octobus]

I have a 2002 Bluebird All American RE and I can't get the backup lights or the alarm to work. I have a Doran Monitor from the original setup and the rest of the lights work (turn signals, brakes, running lights, etc.) but not the backup.

There is a positive hot wire that comes into the unit, and I can get the lights to turn on if I jump the positive wire to those going to the lights/alarm, so I know they work. I just cant figure out why it won't click on when I put the bus in reverse.

Any help will be greatly appreciated.

 

[Jolly Roger bus 223]

i would start with the reverse/backup sensor. most likely on the side of the transmission.
but i dont know your bus either.

 

[johnbloem1974]

And if the sensor is on the transmission like mine is, the engine has to be running for it to work as it is a pressure sensor...

John

 

[Sir Octobus]

Duh

It's a fuse in the engine bay. It's even marked "backup lights."

Gosh, how simple.