Bumble
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| posted on 22/4/10 at 11:24 AM |
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Megasquirt Cooling Fan Option
Hi all,
I have the MS option installed to control the rad cooling fan. I fancy the idea of an override switch but not sure how to wire this in. Any
suggestions please?
Thanks,
Matt
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flak monkey
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| posted on 22/4/10 at 11:34 AM |
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Just wire in the switch to switch the relay to ground.
You should have MS controlling a relay, switching it to ground when the fan comes on. Run another wire from the switched ground on the relay to your
override switch, then the other side of the switch to your chassis.
Hey presto, fan override 
I have mine wired up this way and it works fine.
David
Sera
http://www.motosera.com
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Bumble
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| posted on 22/4/10 at 12:25 PM |
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Cheers David,
So in the attached pic, run another wire from terminal 56 on relay to one side of override switch other side to earth?
If so, very simple.
Thanks,
Matt
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flak monkey
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| posted on 22/4/10 at 12:26 PM |
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Yep, simple as that
Sera
http://www.motosera.com
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Bumble
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| posted on 22/4/10 at 12:33 PM |
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Thanks.
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ChrisW
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| posted on 22/4/10 at 01:46 PM |
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You shouldn't need an override if you have the temp values in the MS set up correctly! 
Chris
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Bumble
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| posted on 23/4/10 at 12:44 PM |
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quote:
Originally posted by ChrisW
You shouldn't need an override if you have the temp values in the MS set up correctly!
Chris
^^^For sure, but you never know when you might need it so I'd rather put one in and hopefully never have to use it!
Thanks,
Matt
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coozer
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| posted on 23/4/10 at 01:20 PM |
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Does the MS option work after the ignition is switched off?
ATM I'm using the rad switch which has a permanent live and doesn't go off until its cool enough...
It's got a relay as well, need to have a look at the Haynes, I'm confused now.....
1972 V8 Jago
1980 Z750
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Bumble
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| posted on 23/4/10 at 01:30 PM |
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quote:
Originally posted by coozer
Does the MS option work after the ignition is switched off?
ATM I'm using the rad switch which has a permanent live and doesn't go off until its cool enough...
It's got a relay as well, need to have a look at the Haynes, I'm confused now.....
Coozer.....no it will not operate with ignition off.
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coozer
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| posted on 23/4/10 at 01:52 PM |
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Ok, back to original plan then.
1972 V8 Jago
1980 Z750
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