Electric Fan Toggle Switch Diagram

How to wire an on off switch for an auto cool fan by justin cupler.

Electric fan toggle switch diagram.

Circuit electrical wiring enters the switch box. Tape the wires with electrical tape. Switched lines and neutral connect to a 3 wire cable that travels to the light fan outlet box in the ceiling the fan control switch usually connects to the black wire and the light kit switch to the red wire of the 3 way cable in this diagram the black wire of the ceiling fan is for the fan and the blue wire. If you re rusty or new to this automotive element here s a short rundown of how radiator fans work electric radiator fans operate when radiator temperature rises to preset heat range.

At times your cooling fan stops working because a sensor has gone bad but the fan works just fine. 86 87 30 85 optional override switch turns on fan by passing temp sensor and a c relay. And off at 175 f. So now that you have a basic concept of wiring a 2 way switch let s look at the following 2 way switch diagrams to see which type of circuit scenario you have.

A toggle switch can be wired into the system to manually override the cycling of the fan. This was a mediocre way of doing things primarily because the current required to spin the fan was drawn through the switch itself. Adding a manual switch to an electric radiator fan is an economical way of keeping your car cool and in good condition. Depending on the model the thermostat sending unit triggers the fan on at 185 f.

Line voltage enters the switch outlet box and the line wire connects to each switch. A couple of decades ago it was popular to simply add a switch under the dash to control an electric cooling fan often referred to as an auxiliary fan. After you have pulled your switch out from the wall the wires in the box and connecting to the switch should look like one of the following. The temperature controlled switch is designed to turn the fan on when coolant temperatures reach 195 degrees and turn off the fan when temps drop to 185 degrees.

Basic 2 way circuit power coming in at switch. A way to get around this situation is to wire in an on and off switch. Explanation of wiring diagram 1. Or on at 195 f.

Turns on fan when temp switch is activated 5 amp fuse signal circuit 12v switched ignition or fuse panel power on when key is in the run position. The black wire power in source attaches to one of the switch screw terminals. Switch wiring shows the power source power in starts at the switch box. And off at 165 f.