I just watched a Road Kill episode where they hooked the fuel pump up to the parking lights, LOL.Well I ended up for the short term tying the fan into the parking lights.
There's all kinds of kits for aux fans, some cheaper than others...
https://www.radiatorexpress.com/product/221453#tabs
https://www.summitracing.com/parts/...1939832679954&utm_content=GSAPI+5ba2839995bcf