Need Help With Electric Fan On A 68 Mustang


Jul 16, 2011
Installed a Spal electric fan on my 68 mustang and a relay from autozone.I ran fan direct to make sure its not the fan and it woks fine. The fan seems to turn real slow as if it needs more amps? Installed a 75 amp external reglated alternatr and the voltage regulator is getting hot. I followed wire car has original voltage regulator
Thanks for Any info
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yep, first check your current draw, then check your grounds, then check the hot wire gauge you used to power the fan through the relay, it should be at least 14 gauge, and 12 gauge would be better. also what amp relay did you use? it should be a 40amp minimum, some fans require larger.

as for the alternator, you should have something more like 130 amp output, electric fans tend to take a lot of electricity to run.