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-   -   MX5 dash lights , electrical issue (http://www.madabout-kitcars.com/forum/showthread.php?t=7138)

Drummajor 27th July 2019 10:22

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

Drummajor 27th July 2019 14:15

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

landmannnn 29th July 2019 21:20

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

Drummajor 30th July 2019 07:01

Quote:

Originally Posted by landmannnn (Post 101523)
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

Thatís good, I was considering a voltmeter anyway .

Mick O'Malley 30th July 2019 07:31

Belt and Braces
 
I always have both, as I'll see a light more quickly than the gauge hovering around 12v instead of 14+......

https://live.staticflickr.com/65535/...b8869abb_b.jpg

Regards, Mick

froggyman 30th July 2019 08:38

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

oxford1360 30th July 2019 10:14

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

Mick O'Malley 30th July 2019 10:59

Quote:

Originally Posted by oxford1360 (Post 101535)
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

Phaeton 30th July 2019 12:23

Quote:

Originally Posted by froggyman (Post 101532)
On most alternators the lamp feed energises the alternator I think.

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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