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Author: Subject: Zetec Alternator Wiring
Alfa145

posted on 9/3/13 at 09:15 PM Reply With Quote
Zetec Alternator Wiring

I've managed to fabricate brackets to get the original Blacktop zetec alternator to fit under the intake. But now it comes to wiring it. I can see where the main output comes from but there is a plug with 3 pins on it. Anyone tell me what these 3 pins are for?
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big_wasa

posted on 9/3/13 at 09:41 PM Reply With Quote
This is Fords smart charge setup. The alternator is controled by the ecu. Its not as easy as sticking some voltage to it.
Ive used them before on cars with no wirring to the three pin plug at all and they will self excite and charge.
There are three wires on a multi plug...

One is the monitor wire, its just a live conection to see the battery voltage.

One is the charge light to the dash.

One is the command wire to the ecu.




Hope that helps

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Alfa145

posted on 9/3/13 at 09:47 PM Reply With Quote
Oh, didn't realise that. Bugger.

Is it safe to use without the ecu control? What are the risks? Don't fancy frying my battery.

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loggyboy

posted on 9/3/13 at 09:56 PM Reply With Quote
Does this help? It sounds more complex than these sorts.
Description
Description






Mistral Motorsport

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big_wasa

posted on 9/3/13 at 10:03 PM Reply With Quote
The alternator still has a regulator, One we did on a mates is still going fine after 2 years.

As far as I can tell the ecu just tells the ecu to stop charging some times to cut load. Its not a straight forward live or earth switch.

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Alfa145

posted on 9/3/13 at 10:07 PM Reply With Quote
So if I just stick a wire to the big terminal and ignore the 3 pins (until I work out which one is the charge light) it should work fine? Charge ok and not fry the battery?
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big_wasa

posted on 9/3/13 at 10:22 PM Reply With Quote
Yep but I am not responsible.

I will have a look through my notes and tell you what pin does what when I get five minutes.

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Alfa145

posted on 9/3/13 at 10:24 PM Reply With Quote
Thanks, Much appreciated.
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Alfa145

posted on 2/7/13 at 08:47 AM Reply With Quote
quote:
Originally posted by big_wasa
Yep but I am not responsible.

I will have a look through my notes and tell you what pin does what when I get five minutes.


Hi,

Did you get chance to look up your notes on the three wires as I'm about to start wiring that chunk of the engine up tonight

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big_wasa

posted on 2/7/13 at 08:53 PM Reply With Quote
Description
Description



Alternator monitor circuit Pin 2 on alt plug

Sorry I haven't got a lot more as all my notes are corrupt. I've changed computer and stuff just will not open.

If you put up a photo of the plug with the three wires it may jog my shite memory.

[Edited on 2/7/13 by big_wasa]

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Alfa145

posted on 3/7/13 at 11:00 AM Reply With Quote
Here's a pic of the plug.

Zetec Alternator Plug
Zetec Alternator Plug


If it's not clear. Grey is marked as 1, Blue as 2 and Red as 3.

So from what you say above my Alternator light wire should go to number 2 the blue wire?

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