The light is activated by a vacuum switch on the firewall under the battery. If you follow the vacuum line form the axle you will find it.
1990 YJ, Colorado Red
with 'Laredo' markings, 4.2L, TF999, NP231, Valvoline Syn fluids, Weber 32/36
, Nutter Bypass, Dana 30/35, 16" Electric Fan, Optima Yellow Top
, 140amp alt., K&N Air Filter, Cherry Bomb muffler, SRC Front Bumper, CH&F Shackles, KC 100w Daylighters, Homemade Lightbar, Rear Aux lights, Cobra CB/PA/WX, 102" Whip Ant., 400 watt power inverter, 2 fire extinguishers, Mobile Internet & WiFi equipped.
Daily Driver since April 23rd, 2003
Northern Illinois Extreme Jeep Club Member www.extremejeepclub.com
Weber 32/36 Install -> http://www.jeepforum.com/forum/f12/weber-32-36-install-write-up-382309/
Early YJ Club Member #37
For anyone with a 4.2L --> http://groups.jeepforum.com/258s_Unite