Manual fan switch

[masterdave]

how to i wire up this switch? can i just run a fused live wire from the battery to a switch on the dash then straight to the positive on the fan?

[masterdave]

after much searching i think i may have answered my own question, the fan only needs to be earthed to work, so if i wire up a switch that connects the wire to an earth, then this will work?

[masterdave]

Someone?

[Stratman]

In answer to your question, I don't know, but I wonder why you want one? Mine has never run hot and in fact when I changed the coolant the other day I let her run for 15 minutes before the fan kicked in.

[masterdave]

I spend a lot of time in traffic in town, just useful really tbh

[bladeade]

I Joined a wire to the sender unit then to a switch then to earth, works spot on.

[tony.mon]

Firstly you might want to run it via a small relay, but as a fuse is already fitted in the fan live feed an additional one won't be needed.
I'd advise a small LED so you could see when it was turned on, so as to avoid leaving it on permanently when it wasn't needed.

It's possible to fit a second fan on the LH side rad, but it needs to be very slimline- apparently the R1 fan might be ok, but haven't checked myself- check before splashing the cash.

You could probably find an in-line coolant temp sensor which housed an adjustable thermoswitch; this would give you the option of setting the cut-in temp.
Shouldn't be a difficult thing to rig.

However a conversion for the four-row oil cooler from an SP1 or 2 might be all that's needed to keep general engine temps down- I have one and the fan cuts in less than it did before, even with all the engine work.