MadaboutKitcars

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

Could I fit a volt meter dial in the absence of the charge light ?

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

That’s good, I was considering a voltmeter anyway .

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

On most alternators the lamp feed energises the alternator I think.

Just out of interest, the yellow wire coming out of the alternator...where does that go?

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

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.