i'm installing a fan switch so i can turn my fan on at the track. im grounding the wire from the auto fan switch on the pass side of the block. when i wire the switch the ground wire goes the "power" on the switch. then another wire to a ground is connected to the "ground" on the switch. and a 12v source is connected to the "acc" on the ****ch, right?? thanks, RS ------------------ 1992 Camaro RS Mods: 14x3 Open element w/ K&N filter, MSD 6a, MSD GM blaster Coil ,MSD 8.5 SC wires, AFPR,Fuel Pressure gauge(60Psi max), 3-Row Al rad. , 180* t-stat, Hooker 1 5/8 headers, 3" Catco cat, 3" Hooker Aero Chamber cat-back, "Ultimate TBI" mods Best Time: 15.279@89.02MPH Underdog Racing

If you are referring to a lighted toggle or rocker switch, then the power, ground, and accessory terminals on the switch should be connected as follows:

Power terminal - connect to chassis ground.

Accessory terminal - connect to fan relay control wire that also goes to fan switch in cylinder head.

Ground terminal - connect to +12 volt ignition power.

With the connections above, the light in the switch & the fan will turn on when the switch is turned on, if the ignition switch is in the on position.

Tim