Chapman alarm?

hey whats up everyone,hope everybody had a great new years! i bought a toyota 4runner a few months back and it has factory keyless entry with what it appears to be a addon CHAPMAN alarm. does anybody know anything about this alarm or brand? i can't find the model number on the brain...the brain says chapman, but the shock sensor says code alarm. anybody has or know where i can find a wiring diagram for it? i want to see if there is a dome light feature that the installer didn't hook up...

If you can get some more information on it I might be able to dig up a diagram for you. Most of the newer code alarm stuff has the shock sensor built in so I'll assume it's a little older unit..Try and get a pic or just a list of what wire colors you have coming off of the module if possible and I will see what I can come up with. Mike