David Jenkins
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 posted on 24/7/02 at 07:40 AM |
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Fan & switch
I've got an electric fan, together with a Fiesta thermostat housing with a thermo switch on my x-flow.
I've been reading up on wiring practices and they often recommend using a fan relay. Fair enough, but the wiring would be a lot simpler if it was
just
fuse -> switch -> fan -> chassis
What have other people done?
David
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locodude
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| posted on 24/7/02 at 05:55 PM |
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Hi David
You really need a relay and fused supply for the fan as it draws a large current. Check the locost car club site for help on electrics and how to wire
the relay, I did and got it right first time. If you can't find the link mail me and I'll send you it as a word doc.
Chris PTM
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David Jenkins
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| posted on 25/7/02 at 07:50 AM |
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Bugger!
I was hoping to make life easier! On reflection, I should have realised that the coils in the fan will cause quite a bit of arcing at disconnect.
Most words of wisdom I've read lately say "use a relay".
I'm currently working out the wiring diagram and loom layout - electrics is the one area in the car I can approach with some confidence, as it's
about the only thing in the construction that I've done before (e.g. 25 years in the telecomms industry, a lot of it wiring stuff up).
cheers,
David
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stephen_gusterson
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| posted on 25/7/02 at 07:42 PM |
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i couldnt get the fiesta switch easily into my system using a ford V6 as there is no where to put it.
So my fan will run all the time - it still gets to temp in the garage and i recon my 2.4l V6 might need that little bit extra - using a volvo 240 rad
- seems to be a good size for a locost
atb
steve
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stephen_gusterson
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| posted on 25/7/02 at 07:45 PM |
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quote:
Bugger!
I was hoping to make life easier! On reflection, I should have realised that the coils in the fan will cause quite a bit of arcing at disconnect.
Most words of wisdom I've read lately say "use a relay".
I'm currently working out the wiring diagram and loom layout - electrics is the one area in the car I can approach with some confidence, as it's
about the only thing in the construction that I've done before (e.g. 25 years in the telecomms industry, a lot of it wiring stuff up).
cheers,
David
I always thought the fiest didnta use a relay. CHeck a Haynes manual in your local library? The 950 mk1 didnt even have the switch - it ran all the
time and you could by a retrofit switch , loom and housing if you wanted.
You could also get a suppressor cap from RS or Farnell - that will reduce the back emf from the motor a lot.
atb
steve
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johnston
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| posted on 25/7/02 at 07:49 PM |
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you can always run it through a manuel switch on the dash if u buy a relay it will or look at the instrutcion in a spot light fitting kit it will tell
u how to wire it up.
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david walker
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| posted on 30/7/02 at 09:20 PM |
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You don't need a relay when using Fiesta fan switch
Dave Walker, Race Engine Services - 07957 454659 or 01636 671277
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johnston
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| posted on 30/7/02 at 10:15 PM |
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is there not a relay near the fuse box for it ????????
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David Jenkins
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| posted on 31/7/02 at 07:55 AM |
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I'm doing my own loom - I can have as many relays as I want!
I've decided to fit a relay, as (a) it seems like a good idea (b) I've got a suitable relay anyway, and (c) there's room in the relay box for
it!
cheers,
David
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chrisg
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| posted on 31/7/02 at 07:32 PM |
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I've got a manual switch on the dash, no relay and a temp guage, I reckon I can watch the guage and switch on the fan when I need it.
I could stick a relay in I suppose, but I'm too busy with the engine.
Cheers
Chris 
Note to all: I really don't know when to leave well alone. I tried to get clever with the mods, then when they gave me a lifeline to see the
error of my ways, I tried to incite more trouble via u2u. So now I'm banned, never to return again. They should have done it years ago!
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stephen_gusterson
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| posted on 31/7/02 at 10:26 PM |
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so, when you do get your engine all nice and running right, you gonna trust your memory with the switch?
brave man! 
atb
steve
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