of 102C (216F) 3) Electric cooling fan on radiator, 200/300 watt 4) Fuse for ... fan first stage on fuse panel a. #7 fuse on ... amp 5) Second stage relay for radiator fan high speed, a. Under dash, to right of ... speedo on 83-85 models (round headlights) b. ... and pipes throughout The 200/300-watt motor system is a two-speed design. The first ... stage activated by either the AC being turned on, or automatically by ... the radiator thermo-switch, second stage by the later only. With ... AC off, all the current for either speed flows through one fuse on the fuse ... ). When in the first stage mode (low speed), current flows directly through the ... the first stage contact on the thermo-switch, which is in first stage mode (85C/ 203F ... ). Current travels through the switch and comes out of the switch via the ...