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Tribute Automotive Builds Discuss your Tribute kit build |
27th July 2019, 10:22
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Join Date: May 2013
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MX5 dash lights , electrical issue
Guys, any electrical gurus out there?
My mk2 MX5 now has the super charger fitted and megasquirt2 Ecu .
Those also in the know know that you have to fit a mk1 alternator as it is self regulating as the mk2 alternator is regulated via the Ecu (which has now been removed to fit the mega squirt)
All works fine , however I do not any longer have the battery charge light on the dash which should go off after a few seconds .
Is there a way around this ? As the mot man may wish to see it.
Many thanks
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27th July 2019, 14:15
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Join Date: May 2013
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Could I fit a volt meter dial in the absence of the charge light ?
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29th July 2019, 21:20
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Location: Coventry and the Limousin
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The lack of a charge light isn't an mot fail. You could do a bit of wiring to get the light working, but a voltmeter is much better solution
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30th July 2019, 07:01
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Quote:
Originally Posted by landmannnn
The lack of a charge light isn't an mot fail. You could do a bit of wiring to get the light working, but a voltmeter is much better solution
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That’s good, I was considering a voltmeter anyway .
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30th July 2019, 07:31
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Belt and Braces
I always have both, as I'll see a light more quickly than the gauge hovering around 12v instead of 14+......
Regards, Mick
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30th July 2019, 08:38
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Join Date: Dec 2011
Location: Devon
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On most alternators the lamp feed energises the alternator I think.
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30th July 2019, 10:14
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Just out of interest, the yellow wire coming out of the alternator...where does that go?
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30th July 2019, 10:59
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Quote:
Originally Posted by oxford1360
Just out of interest, the yellow wire coming out of the alternator...where does that go?
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The two thick spades on an alternator are joined internally, a continuity test will confirm this, so either can be used as a positive feed. The thin wire, in series with the ignition/charging lamp simply energises the field.
Regards, Mick
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30th July 2019, 12:23
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Member
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Join Date: Dec 2016
Posts: 53
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Quote:
Originally Posted by froggyman
On most alternators the lamp feed energises the alternator I think.
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I was also of this opinion, that's why with most digital dashes you have to either fit a resistor or hide a normal 5W bulb somewhere under the dash.
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