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View Full Version : Wired an extra fan and now blew the relay?


JCell
09-05-2009, 12:44 PM
Well, here is the backstory, i removed my AC because it broke, i took the AC fan out since it would just sit there. i got another slim fan to take its place to help with the constant stop and go traffic in high heat i put the car in.


I wired the extra fan to the existing fan, unfortunatly i didn't research the ampage and voltage because i was hoping it would run on fuses.


anyone replace the existing relay to take the extra power? Thanks
CrazyCaker
09-05-2009, 01:31 PM
Add another relay taking power directly from the battery, and just use the existing wire as the trigger on the new relay.
TWISFM
09-05-2009, 03:27 PM
good luck with the problem
JCell
09-06-2009, 05:26 PM
Add another relay taking power directly from the battery, and just use the existing wire as the trigger on the new relay.

would that really be the only way? i messed around with the wires on the relay and ended up blowing a main fuse

i cant see why the relay would mess up, i would expect a fuse to go but so far all still are good

All i want is for both fans to turn on at the same time when the engine feels the need
CrazyCaker
09-06-2009, 06:22 PM
iirc, the fan relay is only rated at around 10A. If you are using two slim fans, the current is likely about 14-15A. You can use any common 30A relay and accomplish what you are trying to do.
JCell
09-06-2009, 06:27 PM
really? that simple? sweet!
JCell
09-06-2009, 08:38 PM
that did it, thanks!
CrazyCaker
09-07-2009, 08:39 AM
Glad to hear. Remember to fuse the wire that's direct from the battery.
E21BIMMERHEAD
09-16-2009, 11:32 PM
be careful of starting a fire, drawing more than what that relay is designed to do could cause a proplem................fires get pretty hot lol.
CrazyCaker
09-17-2009, 12:08 PM
^ although true, it doesn't apply in this scenero at all. He would simply be using the existing wire (from the stock relay) as the TRIGGER for the new relay. Also, if the relay is only 10A, how could he possibly draw more without it blowing? Something to think about. Now, the added 30A relay is taking power direct from the battery and based on the slim fans he stated he is using, he would be in around the 15A mark which is a lot less then the 30A it is rated for! Seeing that this new relay is taking power direct from the battery it should be fused for safety. In this case a 15-20A fuse should do.