What about tapping into the feed wire to your factory Instrument Illumination lights? It's the Green w/Red stipe one (NOT the red w/green stipe) that feeds the potentiometer for adjusting the intensity of those lights. On/off when you need it.

HTH,
Dave


'99 Rodeo LS 4WD,
3 Indy 4x susp.lift w/OME 912s & SkyJackers, Aisin hubs, KC fog lights, KC driving lights, 255/75-15 Pirelli Scorpion AT's