So i want to add a toggle switch to my stock fan harness, pretty much just have a hot wire running to the switch and then to the fan, this way my fan would still come on at the stock settings but if i wanted it to run cooler for some runs down the track or whatever i could also this way im not replacing the stock switch to a lower temp switch thus hurting what mileage i do have. Anyways its a 90' camaro rs 305 tbi single fan, my question is does the stock switch cut out the hot or the ground? if its the ground would i just tap into the wire inbetween the stock switch and fan and have the wire on the other side of the switch just grounded somewhere? if its the hot do i need a fuse or anything besides just the wire? i hope this makes sense and i can get some input thanks in advance

 

The stock fan switch grounds the green with white stripe going to the relay. Grounding that wire would give you fan on with key on. A switch on that wire gives you off and on choice with the key on. Yeah, just tap into that wire near the relay for both automatic and manual operation

 

awesome, that'll be easy thank you