E-Fan install questions

[SC_S13]

So I bought an E-fan, and I have no idea where to wire it to. I have an empty plug from the pull fan that I disconnected from the front of the radiator, should i splice it there? Will it be enough to run the fan?

[waynehead05]

^ There's a guy that made a tread that did that. it was either here or fresh alloy. try and find that thread. So far he hasn't posted of any issues, but generally most people make a harness for the fans.

[GSXRJJordan]

You really should use a large-current Bosch-style relay, and an inline fuse. How are you activating the fan? Do you have a fan controller, a switch, or are you going to have it on the whole time the car's on?

I can help you come up with a simple wiring diagram for any of those.

[slider2828]

Get a controller, like DIF or FAL.... easier wiring... I did one over the weekend, worked great with a built in thermostat.... But there are a couple threads on this, try searching!

[SC_S13]

Get a controller, like DIF or FAL.... easier wiring... I did one over the weekend, worked great with a built in thermostat.... But there are a couple threads on this, try searching!

Yeah I did search a little believe it or not :-P and after doing so, I was considering going back to the clutch fan after reading some insight from projectRDM. but I have this big single fan with a black and blue wire, and I was wondering if I should run a setup like Unisa Jecs: http://zilvia.net/f/sale-items/256452-fs-s13-radiator-dual-electric-fans-plug-play.html
or just splice into on of the existing fan plugs without making a harness. I don't know much about wiring and electric currents/resistance/amperage, so i wanted some input in noob standards that are lacking from most of those writeups :-P

[slider2828]

Yeah personally I don't really do fan wiring.... I would like it to turn on low for one temp and high for another like a two step. yeah I was reading Unisa Jecs thread, but its overly complicated and in my situation we had a swapped harness so I dunno. The DIF or FAL controllers are a bit expensive, but they really make things much easier... especially if a noob....

[waynehead05]

sc s13 thank you for posting that link! That's perfect.

[GSXRJJordan]

Sorry I didn't respond to your PM. I would not suggest doing what Unica Jecs did because he used OEM A/C Fans, which don't pull much power or flow much air, and if you wired in two high-current fans to the stock A/C Condenser fan relay (rated at 30A) you'll melt it after a while.

What you want to do is get one fuse/holder ($5) - make sure the fuse holder is rated for the size fuse you're using - and Bosch-style 30/40amp relay ($5) per fan, wired up close to the fans with 14ga wire. Ground one side of the fan to a clean grounding location (scraped/sanded free of paint/grime). Take the other side and plug it into the [87] pin of the relay, and connect one side of the fuse to the battery, and the fused side to the [30] pin (sideways one).

If you're using a lighted switch to turn on the fans, you want to switch +12V, so you'd connect the +12V/"power" side of the switch to your fused power also, the "ground" to a good ground near the switch, and the "ACC" to the [85] pin of the relay. Then you'd ground the [86] pin of the relay to the fan ground. If using one switch for both fans, simply connect the [85] pins together - if using separate switches for each fan, run separate leads (ground can still be combined). The [85] and [86] wires don't have to be 14ga (you can use thinner/cheaper primary wire) because very little current flows through them.

If you're using a fan controller, you want to switch ground instead of +12V, so you'd wire the '85' and '86' pins backwards... the controller's switched ground goes to [85] (or 86, doesn't matter which side of the coil for those), and you'd connect [86] to your fused +12V lead (pin [30]). Some controllers have outputs for two fans, otherwise run the single output to both [85] pins as above for a single switch/two fans.

Hopefully this will answer all questions.

For reference, my 14" Permacool straight-blade fan I ran on my SR setup flowed about 2300CFM pulling and drew about 32A, so I used a single fuse/relay. Altima Fans flow more than that together, but draw over 30A each, so anyone running both fans on a single relay is workin on borrowed time. The Taurus fan draws a little over 30A on low, but 50A or so on high, so you'd better use separate relays for each.

[ricedemon]

does anyone know where to get a lead for ACC power in the engine bay for a SR?