my guess is only reverse needs be connected for reverse lamps.
we have 91 schematics on the main page
the other switch is 5gear can block some ECU things in 4wd, (i forgot what but the 1996 free manual covers that) 5SP/
page 14 backup #1
http://fixkick.com/tranny/sidekick_drive...manual.pdf
91 is 8v engine and my schematics pages have full info there. 21 oages does it all. page 10 shows lamp backup. and page 17, the lamp is already grounded so back switch ,RED just switches power 12v to rear lamps. back.
http://fixkick.com/look/91-complete.pdf
we have 91 schematics on the main page
the other switch is 5gear can block some ECU things in 4wd, (i forgot what but the 1996 free manual covers that) 5SP/
page 14 backup #1
http://fixkick.com/tranny/sidekick_drive...manual.pdf
91 is 8v engine and my schematics pages have full info there. 21 oages does it all. page 10 shows lamp backup. and page 17, the lamp is already grounded so back switch ,RED just switches power 12v to rear lamps. back.
http://fixkick.com/look/91-complete.pdf
http://www.fixkick.com