3 relay fan wiring.. pug / cit and now chevy ;)

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jgra1
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3 relay fan wiring.. pug / cit and now chevy ;)

Post by jgra1 »

Hi all :)

Can you look at

http://3.bp.blogspot.com/_2fj8MH_LeQ0/S ... y+diag.jpg

I have redrawn and simplified the wiring for the series / parallel wiring on our fans.. I want to fit a twin fan set up to my camper...

I am ok with it except the wire coming out of switch position '2' needs to energise all three relays, but in position one, it needs to energise just the first relay.. as I have drawn it, it will energise all relays whether on 1 or 2 position..

as I write I think the answer is a double pole switch or something...
?

will explain more later :lol:
John
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Clogzz
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Post by Clogzz »

You could use a three-position switch with an ‘off’ position, where a diode feeds relay 1 on the 3-relay high-speed position.

Image
2002 C5 2.0i AL4 230,000 km 76372389
jgra1
(Donor 2021)
Posts: 4625
Joined: 27 Nov 2005, 19:07
Location: Kent / Susssex
My Cars: 2010 C5 X7 2.0 hdi 160 exc auto
MG TF 135
Boxer II 2.2 camper conversion
BMW R1200RT
BMW K1300 R
Honda V F R 800 5thG / MT500 Armstrong
x 39

Post by jgra1 »

hi Cloggz, sorry I was using an off,1,2 switch..

but I can see the diode you've added :) looks like it will do the job, thanks
jgra1
(Donor 2021)
Posts: 4625
Joined: 27 Nov 2005, 19:07
Location: Kent / Susssex
My Cars: 2010 C5 X7 2.0 hdi 160 exc auto
MG TF 135
Boxer II 2.2 camper conversion
BMW R1200RT
BMW K1300 R
Honda V F R 800 5thG / MT500 Armstrong
x 39

Post by jgra1 »

the switch is off, 1, 1 and 2 so no need for a diode although I brought 4 from Maplins as I felt guilty buying one for 25p ;)

its not as neet as citroen, work well though :lol:

http://3.bp.blogspot.com/_2fj8MH_LeQ0/S ... +speed.JPG
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Clogzz
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Post by Clogzz »

Oooh ! The lovely contraption ! :lol:

Is an off-1-1&2 switch a common car electrics switch, or did you cobble it ?
Will you have to watch the gauge to switch, and haven’t got thermostatic switching ?

4 diodes for £1 won’t go astray; one day they will come in handy to repair, or to make a bridge rectifier.
2002 C5 2.0i AL4 230,000 km 76372389
jgra1
(Donor 2021)
Posts: 4625
Joined: 27 Nov 2005, 19:07
Location: Kent / Susssex
My Cars: 2010 C5 X7 2.0 hdi 160 exc auto
MG TF 135
Boxer II 2.2 camper conversion
BMW R1200RT
BMW K1300 R
Honda V F R 800 5thG / MT500 Armstrong
x 39

Post by jgra1 »

Cloggz that took me ages ! 30 mins at least!

;)

switch came from Demoon tweaks, was quite suprised to see 1 and 1and2 ..

it even has a fan pic on it ;)

Have digital temp gauge too as dont trust the chevy one, wil work switch manually for now...

another pic in next few days
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