Reverse / Backup Light Switch Location?
 

A friend has an H1 in which he replaced the brake lights. They did not work afterward so he has asked us to repair the wiring. Well, we fixed the brake lights but we are having no joy at all with the reverse lights. We do not know if the backup/reverse lights worked in the first place. However, we do know that there is no power coming to the lights so we need to find the switch. We have been unable to locate useful wiring schematics. Does anybody know where the reverse switch is? Is it in the shifter? On the transmission? Help?!