Rolando 10 Posted May 17, 2010 hello, i've looked through the technical archive bit and cant seem to find how to fit/install a second fan. i see some people install a second fan to come on with the first fan but then this also has an overide switch so they can turn it on manually inside the car. how do you do this? at the moment what i did which was stupid and wrong was, went to the scrapyard, got my self the diesel twin fans, used my 1.6 wiring and then bridged the second fan on to that or can that be done? i'm guessing not as that would be too much strain on the wiring/relays? any help would be great Thanks Ro Share this post Link to post Share on other sites
Anthony 1,003 Posted May 17, 2010 If you really want a twin-fan setup (and I personally don't see the need) then why not just run the relay setup that the diesel models use to control the twin-fans? Plugs straight in and works with no need to modify anything or worry about running too much current through the wiring or thermoswitch. Share this post Link to post Share on other sites
monkee87 2 Posted May 17, 2010 hello, i've looked through the technical archive bit and cant seem to find how to fit/install a second fan. i see some people install a second fan to come on with the first fan but then this also has an overide switch so they can turn it on manually inside the car. how do you do this? at the moment what i did which was stupid and wrong was, went to the scrapyard, got my self the diesel twin fans, used my 1.6 wiring and then bridged the second fan on to that or can that be done? i'm guessing not as that would be too much strain on the wiring/relays? any help would be great Thanks Ro I've done exactly what you said on my GTi. Got diesel fans and basically i took the blocks apart and joined them together and plugged it in. (Got 4 wires going into where there should be 2..) Works exactly how it should. Both come on at a slow speed and then at a faster speed when hotter. Maybe it's not ideal, but it works for me!! Share this post Link to post Share on other sites
large 33 Posted May 17, 2010 The question should be why do you want to do this. If 1 fan is not cooling your engine down then you have a problem with the cooling system. By adding a second fan all you are doing is papering over the cracks. Share this post Link to post Share on other sites
monkee87 2 Posted May 17, 2010 Reason i did it was to cool down my engine quicker. The two fans do that nicely. Share this post Link to post Share on other sites
Rolando 10 Posted May 18, 2010 i'm running a supercharged gti6 engine thats why a second fan is needed. so really, all i need to do is get all the wiring and relays off a diesel and it should all work ok? thanks for the help guys Share this post Link to post Share on other sites
kate205gti 4 Posted May 18, 2010 monkee have you got any pics of the wiring please? ive got twin fans and done exactly as you have (just patched in the wires from the second fan into the same feeds for the first) - but im not convinced its working as hasnt come on yet! cheers Share this post Link to post Share on other sites
de Noir 0 Posted May 19, 2010 If you really want a twin-fan setup (and I personally don't see the need) then why not just run the relay setup that the diesel models use to control the twin-fans? Plugs straight in and works with no need to modify anything or worry about running too much current through the wiring or thermoswitch. 309 dual fan setup does the same Share this post Link to post Share on other sites
Fox 3 Posted May 19, 2010 I just took the wiring from the Diesel 205, plugged pretty much straight in as far as I can remember. Although, swaping to a new radiator helped too! Share this post Link to post Share on other sites
monkee87 2 Posted May 19, 2010 monkee have you got any pics of the wiring please? ive got twin fans and done exactly as you have (just patched in the wires from the second fan into the same feeds for the first) - but im not convinced its working as hasnt come on yet! cheers Basically, i took the grey plugs apart and squished the wires into the spade connectors.. I've got 4 wires going into one of the grey plugs. I'll try and get a photo if you still want? It works fine, i've had no trouble with it. I wasn't sure if mine was working when i did it, but it does! Share this post Link to post Share on other sites
Daviewonder 533 3 Cars Posted May 19, 2010 Im sure when I did this it was a case of just unplugging the fan loom from the diesel and plugging it straight into the gti, no mods needed, I think it even used one of the plus thats normally unused on the gti (red one)? Share this post Link to post Share on other sites
de Noir 0 Posted May 20, 2010 it's just plug & play at least 309 loom, consisting of 3 relays and no resistor connects to +distribution box, -earth point, two fans and thermoswitch 'slow' runs both fans instead of fan and resistor on GTI setup 'fast' runs just one fan Share this post Link to post Share on other sites
series111 21 Posted June 3, 2010 The red plug that is talked about is not in my 205 loom am i right in thinking the two wires which one is red coming from the thermoswich is a permanant live and the other is a yellow wire going to the 5 pin relay (centre terminal) is a swiched live ? please help in final stages now !!!!!!!! Share this post Link to post Share on other sites
dee205 3 Posted June 3, 2010 You should find the other end of the red plug hiding behind the n/s headlight on the GTi. That's where I found mine. Wasn't connected to anything beforehand afaik Share this post Link to post Share on other sites
Daviewonder 533 3 Cars Posted June 3, 2010 Yeah thats right, it just hangs around unused behind the passenger headlight Share this post Link to post Share on other sites
series111 21 Posted June 4, 2010 Yeah thats right, it just hangs around unused behind the passenger headlight Thanks Guys found it was tucked under the screen washer bottle !!!! Share this post Link to post Share on other sites
