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Thread: Spal fan wiring and constant full speed dash switch

  1. #81
    Enthusiast 1xshaunx1's Avatar
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    Quote Originally Posted by k993apc View Post
    Tried everything to get my fans running right. Still no luck so still on full speed.

    Think it will need a compete loom. Fans switchs everything
    Where are you based matey
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  2. #82
    CF-oholic! fla's Avatar
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    Good idea Shaun. I'll try it that way. One fan to speed one and both to speed two. This could be bridged to speed 3 just in case
    Hasan
    VR6 Auto to manual conversion, beige leather, aircon, TT comps, blue dash lights & switches, Koni TA/Nothelle springs, OBD2, 264 cams, Schrick

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  3. #83
    ⋆⋆ CF Donator ⋆⋆ swiftkid's Avatar
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    The problem you are going to have if you are wiring up speed 1 to fan 1, speed 2 to fan 2 and speed 3 to both is backfeeding so you'll need diodes.

    I didn't bother looking into it as I didn't really see the need, the older fans supped soo much power the 3 stage probably just lessened the impact on the battery. The new slimline fans probably draw less power on flat out than the originals did on speed 1 and are 10x quieter anyway.

    If I was going to wire it up as 3 stage I think you end up using a common ground then:

    Speed 1 connected to fan 1
    Speed 2 connected to fan 2
    Speed 3 connected to both but a diode before you meet stages 1 & 2 on each wire

    I'm not great at explaining but you'll go through the 4 pin plug from controller, T off to go to each fan where you'll add your diodes.

    I'm sure someone more electrically minded will be able to confirm as I find electrical stuff wizardry.

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  4. #84
    CF-oholic! fla's Avatar
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    would it be better to have the small fan on speed 1 and the larger on speed 2?
    Hasan
    VR6 Auto to manual conversion, beige leather, aircon, TT comps, blue dash lights & switches, Koni TA/Nothelle springs, OBD2, 264 cams, Schrick

    my car

  5. #85
    Enthusiast 1xshaunx1's Avatar
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    I think Iíll use the same size fans and I think Iíll wire it like this unless someone thinks a different way is better as Iím no sparky but it makes sense to me. You could put a diode on each one for piece of mind but I think that is the minimum you would need, based on you guys are running without diodes at the mo without problems.
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  6. #86
    ⋆⋆ CF Donator ⋆⋆ swiftkid's Avatar
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    As I said I'm not very experienced with electrical stuff myself but looking at that diagram you'd end up with stage 2 & stage 3 powering up both fans, is that the intention?

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  7. #87
    Enthusiast 1xshaunx1's Avatar
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    Thatís what I want swiftkid. Only one fan on when speed one triggers two fans on when temps go higher. Found Durite do an in-line 10amp diode. Should be enough. £4 each off EBay
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  8. #88
    Enthusiast 1xshaunx1's Avatar
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    Look at this bad boy. 20 amp draw, I think it would fit where the powered fan sits. You could switch it on manually when in traffic without the engine running to creep foward.
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  9. #89
    Quote Originally Posted by 1xshaunx1 View Post
    Where are you based matey
    Birmingham mate. Trying to restore it slowly

  10. #90
    CF-oholic! fla's Avatar
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    What type of diode is required? Rectifier diode? Seem to be loads of them on ebay
    Hasan
    VR6 Auto to manual conversion, beige leather, aircon, TT comps, blue dash lights & switches, Koni TA/Nothelle springs, OBD2, 264 cams, Schrick

    my car

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