Will is hurt engine to run cooling fan direct to battery till we get this fixed. Son needs car for work and it costs me too much in gas to run him back and forth. Please read my other cooling fan post for more info. thanks

that will work fine as long as the wiring is done right, etc. you could wire it to something that gets powered only when the key is in the ignition.

Right, that will kill the battery fast unless it comes on only with the ignition. In this situation in a pinch I've used a strong alligator clip to connect to the + battery terminal, then I can unclip it when I reach the destination. I'd use at least 16 gauge or better. Ideally it should have a fuse as close to the battery terminal as possible to reduce risk of fire if there is a short. Or it could be wired to a plug for the cigarette lighter too.

 

If it's not too hot out and there's not too much stop/go driving you could probably get away with just doing either the main or the sub fan. The thermostat will still control the temperature so having the fans running is not an issue.

 

If it has A/c that works, switching that one will get the fans running a bit too.

Edited March 14, 201115 yr by porcupine73
add fuse