Wiring Help/Advice

1. Yates Saxperience Hardcore! Joined: Mar 2005 Pompey/Darlo Posts: 31546 MK1 - 1.1 Animal

   #1 28th April 2008, 17:54

   Right i dont know if anyone on here has done it before but im in the middle of fitting a second fan to the engine, got the fan from a mark 1 1ltr saxo.
   
   Theres only 2 wires for this fan compared with about ten for the s fan, never knew this, not sure if they are all used to work the fan or not, ive fitted one up, hopefully this ones ok, but im stuck with the other wire now, its the one that goes to the fuse box. What ive done is looked in the fuse box where the connection goes to and both wires are blue, the one ive got is yellow, same thickness though.
   
   
   this is in the fuse box, grey box blue wires, same place as where the mark 1 went to, just double the wires.
   
   so ive traced them back, on the back of the fan housing there is 4 thick light blue wires, 2 in each socket, 1 wire from each socket goes to a plug which ive wired the other wire from the mk1 loom to, there was a place for it, was same connect on both plugs (mk1 and 2) so hopefully that will be fine, but the other two wires lead up to the fuse box.
   
   wondering if i just cut into one strip it back and solder the yellow one in if that will be fine, and if yes, which one should i cut into? i mean they are both going to the same place so i cant imagine that one will be different to the other, anyone got any ideas?
   
   
   the two sockets and the 4 thick blue wires
   
   
   as you can see two of the blue wires bend back and go off to another plug
   
   just unsure which other blue wire i should cut into to fix the yellow one to it, or unsure if i should do this and theres another way to do it?
   
   any advice or help would be great...
2. raunchz Saxperience Addict Joined: Jul 2005 Solihull / Bournemouth Posts: 14233 2015 Lapiz Blue Golf R

   #2 28th April 2008, 18:18

   I don't know if this helps or not, but . . . . .
   
   I have fitted a double vts fan unit to my westcoast after doing a vts engine conversion, but only have wired up one as when researching it some people reckoned that the wiring might not be 'strong' enough to take/power 2 fans when they come on.
   
   All I did, was cut off all the relay's etc. from the fan unit cowling just leaving me with the x2 wires coming out of both fans, then wired up one fan to the existing x2 wires for my westcoats fan, and it works fine.
3. raunchz Saxperience Addict Joined: Jul 2005 Solihull / Bournemouth Posts: 14233 2015 Lapiz Blue Golf R

   #3 28th April 2008, 18:18

   I've not bothered with messing round with trying to wire up the 2 stage fan etc. as I prseum that's what the relays do ??
4. Yates Saxperience Hardcore! Joined: Mar 2005 Pompey/Darlo Posts: 31546 MK1 - 1.1 Animal

   #4 28th April 2008, 18:44

   its been easy to do, there is a socket towards the top of the housing that two of the blue wires go to, there is space for another wire in this, and thats where the first wire from the 2nd loom went to, its where it went on the saxo it was taken off, just wondering about the one going to use fuse box
   
   not heard if it will make it weaker or not though
5. leeroybrown Saxperience Hardcore! Joined: Nov 2006 Durham Posts: 16000 Clio Trophy 025/500

   #5 28th April 2008, 18:46

   well you want the rad as cool as possible and the existing fan switches on because it senses the coolant temp is too high. When it reaches the target temp it cuts the fan off. The time taken for 1 fan to cool a rad will be longer than 2 fans. Thats the difference. I would add a switch via a relay or wire them up together, but do it right with another relay so u dont overload the original wiring circuit.
6. leeroybrown Saxperience Hardcore! Joined: Nov 2006 Durham Posts: 16000 Clio Trophy 025/500

   #6 28th April 2008, 18:49

   Haynes manual as the wiring digram in it
7. Yates Saxperience Hardcore! Joined: Mar 2005 Pompey/Darlo Posts: 31546 MK1 - 1.1 Animal

   #7 28th April 2008, 18:49

   shouldnt overload it anyway, its only the one going to fuse box, i cant imagine its going to overload it in any way
   
   how easy would it be to have it on a switch? only thing is if they were on switch then i wouldnt know when the engines too hot
8. leeroybrown Saxperience Hardcore! Joined: Nov 2006 Durham Posts: 16000 Clio Trophy 025/500

   #8 28th April 2008, 18:51

   You will know when the engine is hot, as the fan thats already on the car kicks in, then you can flick a switch and bung the 2nd one on.
   
   Easy to install a switch all you need is a neg and a power
9. Yates Saxperience Hardcore! Joined: Mar 2005 Pompey/Darlo Posts: 31546 MK1 - 1.1 Animal

   #9 28th April 2008, 21:24

   wired it into one of the wires going into fuse box, then cut into it and added a switch any how so i can control that one, 1st one still comes on automatically anyway
10. leeroybrown Saxperience Hardcore! Joined: Nov 2006 Durham Posts: 16000 Clio Trophy 025/500

    #10 28th April 2008, 22:07

    best way then you can have it on when you like
11. mada Newbie Joined: Apr 2008 romford Posts: 14

    #11 29th April 2008, 22:39

    Quote:

    Originally Posted by Yates shouldnt overload it anyway, its only the one going to fuse box, i cant imagine its going to overload it in any way how easy would it be to have it on a switch? only thing is if they were on switch then i wouldnt know when the engines too hot

    it'll just blow the fuse, but then of course you'll have no working fans. i learnt this from experience, i had it wired like this for around 4 months untill i got stuck in a really bad traffic jam. then of course the fuse went, i had no fan and the engine overheated.
    
    personally id use a relay in the orignal fans circuit to switch on the second fan, therefore having a separate circuit and fuse for each fan. if a diagram is required PM me.
12. jamie_k Regular Poster Joined: Feb 2008 Milton Keynes/Southampton Posts: 416 mk1 VTS

    #12 30th April 2008, 07:42

    agreed with mada, then your not overloading the existing wiring with too much current, yet it still works exactly the same principle
    
    studying electronics at uni
13. Yates Saxperience Hardcore! Joined: Mar 2005 Pompey/Darlo Posts: 31546 MK1 - 1.1 Animal

    #13 30th April 2008, 10:28

    the way i have it, the 2nd one wont ever be on when the first is, its only really going to be used after track days i would think, car hardly ever gets used, so i should think that its fine.
    
    also - i always have spare fuses in the car incase anything blows