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Old 11-30-10, 04:26 AM   #1
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Red face SE electric fan wiring

I am shocked i didnt have any luck finding this for myself but, where on my car will it be easy/safe to wire in my auto switch for my electronic fan. i dont know where the best switchable 12v source is. Thanks for any help!
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Old 11-30-10, 08:52 AM   #2
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don't know on the SE but you can usually use the ignition coil's positive (+) signal as a switched 12v.

as far as auto switch, do you mean thermostat?
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Old 11-30-10, 09:40 AM   #3
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a test light is a good investment for checking/finding +12v whether switched or constant. i usually come out of the fuse box but the + side of the coil will work.
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Old 11-30-10, 02:25 PM   #4
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Black/white wire in the plugs for the main relays is switched 12v. 2 round black rubber covered relays next to the master cylinder, against the firewall, under the hood.
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Old 11-30-10, 03:32 PM   #5
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What are you using to actually control the fan? Please don't tell me you plan to use a manual switch on the dash for this.

I found a dirt cheap adjustable fan controller at Autozone for under $20.00 which has worked great for about three years so far. You will also want to use a relay to deliver power to the fan. If you don't understand relays, then research it because this is important.

Good luck.




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Old 11-30-10, 04:19 PM   #6
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Quote:
Originally Posted by Kentetsu View Post
What are you using to actually control the fan? Please don't tell me you plan to use a manual switch on the dash for this.

I found a dirt cheap adjustable fan controller at Autozone for under $20.00 which has worked great for about three years so far. You will also want to use a relay to deliver power to the fan. If you don't understand relays, then research it because this is important.

Good luck.
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Listen to this man!!!!
He is 100% correct on both counts!!
1) Use a Relay
2) Use a Automatic thermo-switch
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Old 12-02-10, 01:25 AM   #7
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I am usuing an auto thermo switch.
I am also familiar with usuing relays from hooking up off road lights on my old truck... the directions say nothing about having to use one and the fan is only pulling 9 amps.. doesnt sound like a lot of power so maybe a relay isnt required?
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Old 12-02-10, 08:40 AM   #8
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Always use a relay for a fan/driving lights. Especially in a 25+ year old first gen with wimpy fusible links and a small 55amp alternator.
Depending on your thermoswitch, it may (or may not) already have a built in relay.
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Old 12-02-10, 12:06 PM   #9
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Any pictures or maybe a part number for the fan controller Kentetsu? Last time I bought one it was almost $50.
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Start spending your evenings sitting on your balcony, cleaning your shotgun.
Why work towards a quieter car, when what you really want is quieter neighbors?
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Old 12-02-10, 01:34 PM   #10
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^Same, the one I'm using was $45 on ebay. Has the relay built into.

To the OP, what kind of fan are you running that only draws 9 amps? Most of the ones i see draw closer to 20 or even higher.
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Old 12-02-10, 02:19 PM   #11
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I'm sorry, but I don't have a number for the controller, or a photo handy. When I found it, it was not out on the shelf, but behind the counter (so I had to ask for it). It is the only one that Autozone carries in that price range.

Shit, that was frustrating. Took the time to look it up (their website sucks!). The links usually don't work for something like this, so I'll also paste the info I got below the link just in case.

http://www.autozone.com/autozone/par...er=267187_0_0_



Compressor Works/Electric Fan Thermostat

Part Number: 733653

Price:$17.99
AVAILABILITY:STORE PICK UP AVAILABLENormally stocked at your local store.SHIP TO HOMEAVAILABLEShips within 2 business days.
Check Fit!


Features & Benefits

All TorqFlo electric fan thermostats are designed and engineered to the toughest standards for proper fit, form and function.

Part Number: 733653
Weight: 0.6 lbs
Thermostat Type: Economy adjustable
Adjustable Temperature Range: 32F - 258F
Probe Type: Push-in
Shipping Information: Overnight and Two Day shipping are not available for PO Box, APO/FPO/DPO or US Territory addresses.
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Old 12-02-10, 06:29 PM   #12
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Your fan may only draw 9 amps when running but what does it draw on start up? That's the kicker. The initial draw to spin up an electric motor is often much more than it's running draw. That's what relays protect against as long as the power wire is from a good source. I wired mine into the 2nd gen under hood fuse box, with a 30 amp relay.
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Old 12-02-10, 07:17 PM   #13
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Thanks Kentetsu. That should save me some money. That looks exactly like the one I bought except a different brand.
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Start spending your evenings sitting on your balcony, cleaning your shotgun.
Why work towards a quieter car, when what you really want is quieter neighbors?
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Old 12-03-10, 07:57 PM   #14
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heres a link to the one i am using. i just quickly read the box of the fan and it said something around 9 amps draw but i dont know if thats during start up or when its already spinning...ill read it again though

http://www.summitracing.com/parts/HDA-3653/
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Old 12-03-10, 08:48 PM   #15
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I don't recall the brand name of the thermo controller I have on the widebody but that looks like the same kit. Keeps the temp rock solid at 180*, monitored by an AutoMeter temp gauge.
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Old 12-03-10, 10:07 PM   #16
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Ultimate Fan Controller

If performance is more important than price -
I highly recommend the Flex-A-Lite VSC. (Part# 31165-VSC)

Click the image to open in full size.


Operation:
One of the improvements of the Variable Speed Control is its soft-start feature that prevents the fans from drawing a large surge when they spin up. It's much less stress on the electrical system, especially with trucks using two large fans with a combined total of 5500 cubic feet per minute of flow!


- Also reducing stress on the electrical system, the VSC will not power up the fans for a 5 second delay after ignition.


- When the VSC starts the fans it powers them at 60% speed reducing noise and power draw. If the coolant temperature continues to rise, the VSC will increase fan speed gradually to 100% over the next 10 degrees beyond your calibration point.
- The air conditioner clutch will also activate the fans at 60% power unless coolant temperature is higher than the calibration point and the fans are already running at a higher speed.


- The VSC will continue to run the fans for up to 30 seconds after shutdown if the coolant temperature in the core is sufficient. (This feature will prevent post-shutdown boil-over in high-temperature applications.)


- The manual override ON input allows the fans to be turned on at 100% speed at any time, regardless of temperature or AC status, as long as the ignition is on. The engine does not have to be running. (This will be especially handy at the drag strip!)


- The manual override OFF input will prevent all other inputs from starting the fans. (The ability to disable the fans is a nice safety consideration if work must be done in the engine compartment while the engine is running. Electric fans can surprise you coming on without warning.)


Available at JEGS.

This is what I used before the Haltech controlled the fans.

It worked more efficiently with the variable speed, and the 30 seconds after shutoff feature.
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Old 12-06-10, 11:54 AM   #17
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a simple fix will cost more than $100 bux now....only in the RX7club LOLLLLLL
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Old 12-06-10, 11:54 AM
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