Electric fan

Anything related to the cars electrics... problems.... mods... fixes etc
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A7RXY
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Joined: Fri Apr 01, 2011 6:55 am
Location: Upminster, Essex UK

Electric fan

Post by A7RXY » Thu Oct 01, 2015 2:27 pm

I'm going to fit a fan in front of the rad to use as a back up when needed. I want to be able to switch it on and off from inside the car, therefore I'm looking for a switch to use. On our later series 3 cars we have an A/C switch inside the fan speed control for the heater blower, has anyone tried to use this switch, as I do not want to have to add a new nonstandard switch and all the other switches are already being used, or does it not have any terminals behind it.
I know I could take the panel out and look but I know some of you have removed panel so thought I would ask on here first.

Dibs
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ian65
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Re: Electric fan

Post by ian65 » Thu Oct 01, 2015 9:15 pm

you can use the a/c switch Dibs and you don't need to strip the panel out. The S3 fan and combined a/c switch looks like this...

Image



Image

if you pull your radio out, you should be able to see this single wire hanging loose and connect onto it..... I checked this switch with a multimeter and thought it switches the +12v to the a/c...... but perhaps not, ..... check it in the car..... either way, you should be able to switch a relay with it.

.
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A7RXY
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Re: Electric fan

Post by A7RXY » Thu Oct 01, 2015 9:42 pm

Thanks Ian, That's the answer I was hoping for. I tried to take the panel off tonight but had to stop when I could not get the radio out, I'll now try again tomorrow.

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myatt1972
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Re: Electric fan

Post by myatt1972 » Thu Oct 01, 2015 11:11 pm

I'm not sure that's right, I have used the ac switch and I think (not 100% sure) that it switches the neg. It also only works if the heater blower is on. I will double check my wiring for you.
Keith...
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A7RXY
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Re: Electric fan

Post by A7RXY » Fri Oct 02, 2015 8:08 am

Thanks Keith.

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myatt1972
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Re: Electric fan

Post by myatt1972 » Sun Oct 04, 2015 11:03 pm

Checked mine today and its the blue wire with green tracer that is a switched neg from the push button, it does only work if the fan speed switch it on 1 2 or 3.
The single wires from the switch are for illumination.
Keith...
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A7RXY
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Re: Electric fan

Post by A7RXY » Mon Oct 05, 2015 10:49 am

Thanks for the info Keith, think I'll go for a new switch then, just got to work out where to put it.

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apexheid

Re: Electric fan

Post by apexheid » Mon Oct 05, 2015 1:37 pm

why not to put in red or green colour light round rocker switch inside the cigar socket. mine is like that.
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Hobbawobba
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Re: Electric fan

Post by Hobbawobba » Mon Oct 05, 2015 4:43 pm

apexheid wrote:why not to put in red or green colour light round rocker switch inside the cigar socket. mine is like that.
Got any pictures of that?
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apexheid

Re: Electric fan

Post by apexheid » Mon Oct 05, 2015 8:52 pm

Hobbawobba wrote:
apexheid wrote:why not to put in red or green colour light round rocker switch inside the cigar socket. mine is like that.
Got any pictures of that?

very good question.. tomorrow, specially for you.. r:
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