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Duratec alternator wiring
TrophyJem - 4/5/14 at 08:05 PM

I have the standard duratec alternator and I'm trying to sort the wiring of the 3 pin plug.

Does anybody have the connection details please?

Cheers

big_wasa - 4/5/14 at 08:16 PM

Not done a duratec but other Fords use a three pin Bosch and its controlled by the ecu. Years ago it was called Smart charge.


Re your three pins. One is a voltage reference ie the battery. Another is the charge light. The last is the command wire from the ecu.

TrophyJem - 4/5/14 at 08:18 PM

quote:
Originally posted by big_wasa
Not done a duratec but other Fords use a three pin Bosch and its controlled by the ecu. Years ago it was called Smart charge.


Re your three pins. One is a voltage reference ie the battery. Another is the charge light. The last is the command wire from the ecu.


Does that mean I can't use it without ECU control?

big-vee-twin - 4/5/14 at 08:35 PM

You need to loose the alternator and get a small denso unit.

TrophyJem - 4/5/14 at 08:46 PM

quote:
Originally posted by big-vee-twin
You need to loose the alternator and get a small denso unit.


I don't need a smaller one as this one fits. I assume I need a different type as this one isn't going to work? :-(

big-vee-twin - 4/5/14 at 08:57 PM

Your using Megasquirt I think from previous posts the MS cannot control the original alternator.

Most use a small Denso off a Diahatsu charade or similar. These types do not control their output via the ecu.

atm92484 - 4/5/14 at 09:52 PM

I'm running an alternator from a 2.0L US Focus with nothing controlling it. It levels off at 13.5v and stays there. I'm sure its less efficient since the ECU cannot reduce output when it isn't needed but it works.

I was going to play with one of the PWM outputs on the MS3 to see if it could provide some sort of control but gave up after I saw a good voltage.

TrophyJem - 4/5/14 at 09:54 PM

quote:
Originally posted by atm92484
I'm running an alternator from a 2.0L US Focus with nothing controlling it. It levels off at 13.5v and stays there. I'm sure its less efficient since the ECU cannot reduce output when it isn't needed but it works.

I was going to play with one of the PWM outputs on the MS3 to see if it could provide some sort of control but gave up after I saw a good voltage.


Cheers for the info.
Where you and to wire up the dash light?

atm92484 - 4/5/14 at 10:03 PM

No never did hook it up. It was on a to-do list somewhere.

big_wasa - 4/5/14 at 10:14 PM

It will self excite and charge with just the main battery cable.

Andy S - 5/5/14 at 08:01 AM

Using the standard one and it charges fine - only issue is that the charge warning light is also ECU switched so does not work
as no where to connect it to.

Andrew