Wiring second fan to switch.

1. Alexp Central South Joined: Jun 2006 East Sussex Posts: 3105 VTS :)

   #1 5th September 2010, 16:13

   Want to try and wire my second fan to a switch on the dash.
   
   Is it a 30amp relay I will need?
   and where to get the feeds from for the fan and internal switch (constant live would be good).
2. Reechard Established Member Joined: Oct 2009 Cirencester Posts: 2286 2x Mazda Mx5s, Volvo s80, Citroen DS4

   #2 5th September 2010, 16:53

   Wire from positive battery terminal to one side of the switch, other side of the switch to the fan and then a wire from the fan to a earth point in the engine bay. Should be one near the ecu and washer bottle.
   
   Thats how mine is wired in, it can be used when keys are out too. good for if you are doing a track day and want to cool the car.
3. user_36594 Established Member Joined: Aug 2009 Weston Super Mare Posts: 1298

   #3 5th September 2010, 18:22

   i dont understand why ppl wire into switches. why dont u just splice into the loom for the other fan so they come on at the same time?
4. Reechard Established Member Joined: Oct 2009 Cirencester Posts: 2286 2x Mazda Mx5s, Volvo s80, Citroen DS4

   #4 5th September 2010, 18:38

   I wired mine in as its my only one and the wiring to loom wouldnt work for some reason.
   
   Plus if you want the fan to come on at a certain point having at least one wired to a switch means you can.
5. user_15516 Saxperience Post Whore Joined: Apr 2007 Posts: 6640 Integra DC5R & VTS

   #5 5th September 2010, 18:54

   Quote:

   Originally Posted by scholesyy i dont understand why ppl wire into switches. why dont u just splice into the loom for the other fan so they come on at the same time?

   Probably wants to leave one fan running after blasting round track.
6. Alexp Central South Joined: Jun 2006 East Sussex Posts: 3105 VTS :)

   #6 6th September 2010, 07:55

   and I don't really want to go around splicing the loom.
   Prefer to use a relay too so I don't have heavy gauge wire every where.
7. SaxoMuffin Established Member Joined: Apr 2008 Reading Posts: 2045 iTB'd MK2 VTR

   #7 6th September 2010, 12:16

   Is it not possible to have the best of both worlds splice it into the loom so they are both coming on at the same time but also splice a switch into the +ve and -ve of the second fan?
   
   *Warning I may sound like a n00b I have no electrical expertise lol*
   
   Oh and I have read the above but it is for future reference
8. silversaxo76 Newbie Joined: Apr 2008 Cambs Posts: 26 ClioMk1 fiestaMK4 VTR - 16V conv

   #8 6th September 2010, 13:05

   Quote:

   Originally Posted by scholesyy i dont understand why ppl wire into switches. why dont u just splice into the loom for the other fan so they come on at the same time?

   - mc donnalds drive thro - lol b*ds take ages