So a few months ago I did some extensive work on the M20 and removed the stock fan clutch and put in a 16'' SPAL puller. Works great- used a 80c thermo switch and wired it up using the stock Aux High-speed fan wiring.
All is well about it, but I have been wanting to wire in another switch that I can force the fan to turn on- rather than waiting for 80c. I've drawn out what I am planning to do- tested it and it works. Just not sure if it is in my best bet to splice and tap into the lines before the thermo switch.
Planning on splicing in before the thermo switch and retrofitting an old defroster switch to turn the aux fan on. Could also use a 30A switch (drawn)- I know this carries 12v but not sure really what amperage the .75ga bk/br and gn/bk wire carries- its just signal right? The 4ga bk/bu carries the actual fan power.
Is this ideal? Or should I somehow tap into the high speed relay #86 and use a dedicated ground?
Note: I have nothing going through the normal speed relay- the fan is set to run only on HIGH through the stock high speed relay
All is well about it, but I have been wanting to wire in another switch that I can force the fan to turn on- rather than waiting for 80c. I've drawn out what I am planning to do- tested it and it works. Just not sure if it is in my best bet to splice and tap into the lines before the thermo switch.
Planning on splicing in before the thermo switch and retrofitting an old defroster switch to turn the aux fan on. Could also use a 30A switch (drawn)- I know this carries 12v but not sure really what amperage the .75ga bk/br and gn/bk wire carries- its just signal right? The 4ga bk/bu carries the actual fan power.
Is this ideal? Or should I somehow tap into the high speed relay #86 and use a dedicated ground?
Note: I have nothing going through the normal speed relay- the fan is set to run only on HIGH through the stock high speed relay
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