Manual Cooling Fan Switches

[Quadcammer]

Originally Posted by Starter986

Hi Pipe,

Quads.

I just want a manual on/off switch for the high speed fans. I'm no electrician... but can walk around it a bit.

I know one 3 position rocker switch's three prongs will be grounded.

One prong of the rocker switch will be connected by wire to the #85 prongs on the two high speed fan relays.

It's the wire connected to the third rocker switch prong that I'm stuck on... wondering where does that wire go. To what does it connect so that when I hit the switch... the fans come on. Does it go to another prong on the high-speed relays? Quad was unclear about that third wire.

Thanks, Pal.

Easiest way is simple to essentially jump the relay.

Forget my switch.

two prong switch is fine.

Connect one wire to a leg of the high speed fan relay (i forget which leg number it is now).

Connect the other wire to a nearby ground

Done.



for those wanting to do my version, you are putting the switch inline with the yellow wire. so you have wire in from the ecu to one prong, wire out to fans from other prong, and third prong for ground.

[Starter986]

Rick... Pipe... thank you for the very clarity I needed. I was overthinking it. I'm no electrical wizard.

Quad... thank you for your help!!

Cheers!

[Jgkram]

Piper was spot on in his assessment. The hardest part of this modification was crawling in the footwell to hook things up to the relay panel. I must admit that I really wanted to make my modification similar to Rick's as his is more elegant but just wasn't up to it at the time and I took the easy way out. However, I have been very pleased with this modification and have used it often during stop and go traffic in the summer months. I haven't used the engine cooling fan nearly as much so that one could be left off but while your doing the mod, why not.

[Starter986]

I ran a wire from pin 85 to ground... and the high-speed fan kicked on (only tested one side).

Just purchased standard round rocker switch... but am thinking that even with the 5 prongs on the back of part #986.613.134.00 (Porsche Boxster Lock Switch Black) I could connect to two of the prongs and achieve the same result, correct? Wire to ground... wire to pin #85... abandon the other three prongs.

Yes? No?

That Porsche Boxster Lock Switch Black would look better than the rocker switch.

Thanks!

[piper6909]

Originally Posted by Starter986

I ran a wire from pin 85 to ground... and the high-speed fan kicked on (only tested one side).

Just purchased standard round rocker switch... but am thinking that even with the 5 prongs on the back of part #986.613.134.00 (Porsche Boxster Lock Switch Black) I could connect to two of the prongs and achieve the same result, correct? Wire to ground... wire to pin #85... abandon the other three prongs.

Yes? No?

That Porsche Boxster Lock Switch Black would look better than the rocker switch.

Thanks!

Those switches won't work because they're momentary switches. I.e. they don't stay closed when you pull your finger off them. An additional relay needs to be added to get those to work.

[Starter986]

Originally Posted by piper6909

Those switches won't work because they're momentary switches. I.e. they don't stay closed when you pull your finger off them. An additional relay needs to be added to get those to work.

Thanks, Pipe.

[Jgkram]

If you want to use those switches then follow Rick's instructions for adding his relay. I think I still have some of the same switches I used and if I can find them you are more than welcome to them. I used a progressive drill bit to drill the holes in the batwing.