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rick lester · 06-09-2009, 10:11 PM

this afternoon i thought about the circuit breakers still being too close to the radiator. so i took them off the radiator core support and actually had them laying on my work cart with wires running from relays to circuit breakers then to battery. yes lots of wires but circuit breakers were no where near a heat sorce. same thing happened. next then was i checked aperage at fans, 12.2 for both directly to the battery with no spike at start-up. the only thing i can think of is the circuit breakers are bad. i wired without circuit breakers and checked everything with while it was working. i found no spiking, nothing over 12.9 amps pooled when fans come on combined at battery ( i had wires from both relays to battery wired together to single wire then to battery, but that not how i will have it set-up permenatly ), so i am eliminating circuit breakers. the reason i went with dual relays is to make sure i don't overload one with a dual fan set-up. this will be a daily driver/tow vehicle/long distance hauler for trips. if i would have used one relay for two fans and the relay goes out, then i would have no fans. this way if one goes out i have the second to use. single relay with dual fans works fine on a race car. i caution on the side of safety when it comes to electrical. i did learn something today, even when the fans shut off, there is still current untill fans stop completlyeven with no electric going to fans. i always assumed when power was shut off there would be no power. i'm assuming since fan is built like a mini generator its still has juice until it "powers down". 39 and still learnig something new everyday.

06-09-2009, 10:11 PM	#6
rick lester Member Join Date: Oct 2004 Location: Littlestown PA Posts: 163 Likes: 9 Liked 4 Times in 1 Post	Re: electric fans relay question. this afternoon i thought about the circuit breakers still being too close to the radiator. so i took them off the radiator core support and actually had them laying on my work cart with wires running from relays to circuit breakers then to battery. yes lots of wires but circuit breakers were no where near a heat sorce. same thing happened. next then was i checked aperage at fans, 12.2 for both directly to the battery with no spike at start-up. the only thing i can think of is the circuit breakers are bad. i wired without circuit breakers and checked everything with while it was working. i found no spiking, nothing over 12.9 amps pooled when fans come on combined at battery ( i had wires from both relays to battery wired together to single wire then to battery, but that not how i will have it set-up permenatly ), so i am eliminating circuit breakers. the reason i went with dual relays is to make sure i don't overload one with a dual fan set-up. this will be a daily driver/tow vehicle/long distance hauler for trips. if i would have used one relay for two fans and the relay goes out, then i would have no fans. this way if one goes out i have the second to use. single relay with dual fans works fine on a race car. i caution on the side of safety when it comes to electrical. i did learn something today, even when the fans shut off, there is still current untill fans stop completlyeven with no electric going to fans. i always assumed when power was shut off there would be no power. i'm assuming since fan is built like a mini generator its still has juice until it "powers down". 39 and still learnig something new everyday.