Silver79

I am getting ready to install dual fans on my 82. I measured 9 amps of current for the factory fan. The dual fan setup draws a total of 15 amps. The car comes with a 25 amp relay for the factory fan. My question is can I just wire the dual fans into the factory harness? I saw that somebody recommended using a Hayden fan controller but upon inspection this only came with a 30 amp relay. Thanks. Joe

mark kibort

I would run the fans through separate relays, but i think the answer is yes, run the fans off the factory relay, as on the S4, each fan is close to 12 amps as measured by a fluke meter. I ran the ACfan and then an after market 14" + fan off the stock relay, but also had a 20amp switch under the dash to turn the fans on if the relay should fail.

Mk

V-Fib

I used a Hayden relay set up for the Devek fans and radiator. There are two relay kits available (that I know of) from Hayden. The one I used was rated for 40 amps/two fans. After running them for 2-3 weeks, the relay failed. If not mistaken, the Devek fans pull about 18 amps each. I replaced the relay, bought and installed a second Hayden kit, and have had no problems since running two relays. With our electrical systems being so sensitive (mine is anyways), I elected not to use the original circuit.