The aux fans don't come on when you want for primary cooling. 225?F+ = way too hot. You want it to come on around or before 190?. None of the other temp switches operate at the correct temp either so repurposing is out there as well. I also wouldn't trust the thin, stock wiring for prolonged use with much larger fans.
I don't recommend electric fan conversions for most cars which come with mechanical fans. An aluminum flex fan is just as efficient (or more if you listen to the sales rep), if the clutch fails you're not dead in the water and for some reason people do an amazing job of fucking up wiring when installing an electric unit... Generally it's ignorance, short cuts and cheap hardware which gets them.
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