Radiator Fan

[benjam_in]

Just changed my cooling fan on the radiator so now i can sit in traffic!!!! The fan i took off had three connectors on it and the new one only had two! Just wondering if any one knows what the difference is??

[richandhazel]

I think the 3 connector one has a 'run-on' facility. Something to do with the fan coming on when you have shut down.

I went the other way and fitted a 3 connector one in place of my 2 connector one. Had to swap over a bit of loom out of the my Mk2 so that I had the right connector.

[benjam_in]

My two connector one has a run on! could be that i just got lucky in connecting the right wire on!   think both of the wires did have power after the ingnition was off! but it was a hot day so cant be sure!

[richandhazel]

I found some info in the Mk2 Haynes manual..............I'll scan it and post it for you, but basically the 3 pin one is twin speed, the 2 pin one is single speed.

[benjam_in]

Cool! that was one of me thoughts yesterday! hunted throught the wiring diagrams at the back of my haynes but there were so many for Radiator Fans i just worked it out for my self!

[richandhazel]

Here's what I found:-

[benjam_in]

Should really read that section shouldnt i! oh well! yea i did replace a 6 blade with a 4 blade! but it was free! if its useless ill have to do an upgrade!!

[modulater]

As rich and hazel said the thermoswitch has three pins for twin speeds. I remember reading something by Steve Cresswell that the 3 pin thermoswitches aren't available anymore and VW give you a 2 pin one these days. I remember the article because the bloke in it cut the original connector off and put spade terminals on and then obviously not having a clue he put them on so that the fan span  the opposite way blowing the air out the front of the car.

He wondered why he overheated.

[benjam_in]

Yea i saw that one too!! in the golf last month! It did make me think twice when doing mine!!

[jerry]

the radiator fan on my 89 mk2 golf gti is not working, car over heats in traffic and the fan doesnt come on. do i have to replace the whole radiator or is it just bits i need to replace, also is it an easy job to do and at what sort of cost.


cheers