Flex-A-Lite fan wiring install?

Kelly, we really need more info about what you're desiring of the fan, what you're willing to spend, etc.

IMHO, a Dc Control unit is best. Hands down.
The soft start FAL controller seems to be decent.

There are dedicated fan switches that can be wired up to a relay.

Then there are the little variable threshold controllers out there - they range in price from 15 to 100 bucks or so. They can be pretty economical.

Then there is the relay and toggle switch method (not something I'd do).

If this is a DD and you're going to keep an E-fan, using a Dc Controller is the way to go IMHO. If you can't wait for one, the bigger FAL unit would likely work well. If doing neither, I would use a cheapo variable controller (20 bucks at the parts house).

Others' opinions will vary and differ.

Good luck.

Also suggest the DC cotroler and have been very pleased thus far. I also wired a relay override just in case but I doubt I will ever need it.
Kevin

Kelly, www.DCControl.com is a company that sells the really good fan controllers.

Now if you already have a controller, did it come with instructions or do you have any specs on it? There can be slight differences in how some of the controllers get wired up.

There are wiring diagrams floating around in cyberspace that should help (Kevin - I'm thinking that Monte Smith's schematic might be helpful to him - you think so too?). I do recall FAL or Hayden having install FAQ and I know I have some links on my other puter (or I'd just post a bunch of links to help out).

Good luck.

hissin has some good info..........or go to Summit and look up the flex a lite fans then download their instructions.

Ok, here's Mr. Smith's article. Awesome info.

Specifically, here's a diagram.

I won't go on in case info like that is not what you're lookin for.

Good luck.

Kelly, questions might need to be a little more specific because there is a load and a control side to the fan's relay.

Fused battery power is used on the load side and a switched (key on accessory) source is usually used for the Control side.

You can use a ground that's convenient (I never see the need to use the battery terminal with something like this).

Good luck.

I do not recommend this wiring circuit to be used for controlling an electric fan since it has no temp sensing capabilities. The circuit is presented merely as an illustration on how to wire an electric fan. It is functional and will work, but does not turn off or on in response to coolant temps. That means you can overheat the engine or run the battery down very easily.


If your Bosch relay is SPDT, one set of contacts is closed then the fan is on. The other set of contacts is open when the fan is on. When the fan is off the set of contacts that were formally off are now on. Wire the indicator to that set of contacts.

Wire sizes:
Fan power feed & Fan ground 10 gauge stranded wire.
Fan controls, relay & LED's 18 gauge stranded wire.

Surge Dampner Diode: 1N4003

Fuse: 30 Amp automotive or circuit breaker
LED's
Green: Radio Shack #276-271

Red: Radio Shack #276-271


No external resistor is needed, since the LED's are designed to run on 12 volts.




See http://www.fordmuscle.com/archives/2003/02/electricfan/index.shtml for the best way to cheaply control an electric fan. Advance Auto Parts or AutoZone will have the Hayden controllers. One is $30 and the other is $50.

The DC Control (www.dccontrol.com) is the best on the market unless you have electronic skills and can build your own. It is expensive $108+ shipping and may have an extended wait time for delivery.