Outer Limits 4x4 Board

Hey guys,
I have just mounted a separate alternator above the air con pump on my Mu.
It is from a Mitsubishi l200 petrol Ute and has 2 wires coming from it.
The 4JB1 alt has 3 wires and I was told that one maybe to drive the rev counter??
Has anyone done this sort of thing before and how hard is it to wire in?
I have done this because I am sick of killing the original alt as it is way too low for water crossings etc.
I have left the original there because of the vacuum pump plus the other is 50 % larger so is better for the electric winch.
Thanks
Roger

,

The original is disconnected from the wiring loom, it is only there for the vacuum pump.
We often run in mud and water that goes up to 1/2 way up the motor so a splash shield is a waste of time as the alt is under water not getting splashed by it.

If you've got a photo of the back of the alternator let us have a look.

Do you mean 2 wires PLUS the main power wire to the battery, or just two wires including that one?

Sorry 2wire plus the main power , the same for the original - 3wires plus the power wire

It probably works the same as this 'un:



Are there any markings there?

Yes that looks and sounds spot on, Now I just have to work out what the third wire does on the original in case it has to be reconnected in some way.

Thanks Heaps for that

I would be guessing but probably the old one had three wires:

1 - battery voltage sense
2 - ignition on
3 - warning lamp

I am not sure how the warning lamp is wired in a MU, but it may not be a straight out case of swapping existing wires onto the two terminals.

Yer, here is the typical 3-wire arrangement: