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Stu Faulkner

MX5 MK2 alternator question.

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Stu Faulkner

Am i correct in thinking that as the alternator on my MX5 MK2 engine has a 2 pin plug as well as the battery feed terminal that one of the pins is for the charge light and the other needs a 12 volt supply?

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darve

Is on mk1

Not sure if that helps lol

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Stu Faulkner
36 minutes ago, darve said:

Is on mk1

Not sure if that helps lol

The wiring diagram that I have shows them to be similar. 

For saying that the MX5’s have so many swappable parts there are so many variations when it comes to the wiring. 

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KugaWestie

The alternator wiring is different between a Mk1 (NA) and a Mk2 (NB) engine

The NB alternator has a voltage regulator which I think the ECU controls. If you are using an aftermarket ECU, you could use an external voltage regulator to charge properly. Or use a Mk1 alternator depending on how the ECU is configured.

I think the plugs are the same though

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Ben (bunje)

id use a mk1 alternator you can get them second hand for pennys

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Gary Taylor - Scotland AO

As above the mk 2 and 2.5 alternators are ecu controlled to avoid this stick with the mk1 version you can get these with either v or robbed pulleys

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Stu Faulkner

Thanks Gents.:yes:

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Stu Faulkner

Won't the MK1 still need a live feed?

As well as the battery connection.

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Dommo

Here's the wiring for the mk1 alternator:

1583159733_MX5mk1alternatorwiring.jpg.3bd448977b76ccb06229d79275e00fae.jpg

So yes, from the main relay...

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Stu Faulkner

Thanks Dommo.

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