6789olds

looking to add a manual switch to the low speed fans so it can be controlled while slow speed 4 wheeling where can i find the wire ? under the fan relays looks like there are 2 blue wires? or the wire number on the pcm thanks

BadAssChevy327

iTrader: (7)

my buddy did this on his truck. only thing is the way he did it caused a check engine light.

but im subing to see other ways how to

Atomic

iTrader: (42)

Are you wanting to be able to turn them off or manualy turn them on low?

6789olds

Turn them on low with a switch

Atomic

iTrader: (42)

Pin 42 on the BLUE pcm connector is the one that controls the low speed fan. Splice into that wire and connect it to a simple 2 position switch, and the other side of the switch to any ground. Flipping the switch will turn it on, and it should still operate automatically otherwise.