I have an 1989 jeep comanche. It had an ignition switch bypass. I took it off and replaced the switch and the relay. If i touch the positive battery cable to the green starter wire on the relay it starts. Everthing works fine when driving. I just don't want this push button. I get power when the key is in but it does nothing in the start position but it still has power i took the ignition wire off at relay and turned had someone turn key to start and it is getting no power.

SOURCE: schematic diagram Jeep 1989

This link should provide all the diagrams you need http://www.google.com/search?q=1989+jeep+comanche+wiring+diagram&sourceid=navclient-ff&ie=UTF-8&rlz=1B3GGGL_enUS249US254.

SOURCE: front parking light wiring diagram

hope this works

SOURCE: location of fuel pump relay

should be under the hood on the drivers side

SOURCE: need wiring diagram for 1988 jeep comanche 4x4 6

check the solenoid on the starter it powers the ign for starting then switches to run when you let off key,either the solenoid is bad or a wire to the solenoid has come unhooked and sometime they have an in line fuse which can blow.

SOURCE: belt diagram for a 1989 jeep comanche

Most auto parts stores have a book that shows how those belt go, you should be able to make a drawing from thier book. Sometimes you find one the internet but, I haven't had much luck there.