Alternator Wiring
Turbo Mini Forums

Fellas, after wiring up my Alternator (Nippon Denso), my car seems to struggle a little when turning over. Also when i connect the batt i get a bit of a spark.

Heres how ive rigged her up, except ive a heavy gauge wire from the nut on the alternator to the stud on the solendoid.

Then followed the diagram below, obviously i have now disconnected the battery.



If i remove green plug from the alternator its fine. So im leaving it off for now.

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


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my battery on the 106 mini and most other cars sparks when i re-connect it depending on what side you took off

Drives
-Ford S-max Mk2 Ecoboost
-Rover 100 VVC #2 - track project

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Hi,
Sounds like you may have a diode down :(
CAn you stick an ammeter btween the alt pos stud and the battery feed cable?
You have got everything else to the alternator on an ignition feed (not permanent) haven't you?
Cheers,
Gavin :)

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But if you disconnect the alt plug it doesnt do this. Obviously if this is happening there is a draw of power somewhere.

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

IIRC the positive goes to the switched live, looks like it is on permanantlyu there.

The Green and Brown wire goes to the ign feed the lights feed then off to the solenoid.

All these are just connected together.

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

Obviously my Lamp Feed and Main Power Lead are correct, its the ign thats to cock. Bat they are perm i think

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

Hi,
Sorry, should have put more words in the first answer!
By "diode down" I'm referring to one of the diodes in the alternator has gone down to earth, this will cause the draw you're seeing, use the ammeter to check
You may possibly be able to feel the alternator is a little warm too.... ?
Cheers,
Gavin :)

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If the ignition feed to the alt is permanent that'll be the problem, as the field winding will be permanently excited

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OK ive got an excited the alternator, So is IGN Light and Main Wire ok??

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

Hi,
Main wire to batt or sol battery term, fine :)
Warning light: Ignition feed to bulb, other side of bulb to alt w/l term? fine
IGN term on alt connected to ignition feed, white OR green wire, job done :)
Cheers,
Gavin :)

Edited by Bat on 10th Oct, 2008.

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So all i need to do is connect the IGN wire from the green connector to the ign feed where? Sorry im a spaz when it comes to wiring.

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

Hi,
Fusebox white or green wire will do
Green's better as it will be fused :)
Cheers,
Gavin :)

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So run a wire from the IGN Live on ths alternator to one of the spades next to the grn wires on the fuse box. Does it have to be a decent gauge wire? Also, what exactly does this wire do?

Edited by MikeRace on 11th Oct, 2008.

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

Hi,
14/0.30 would do, about the same thickness as sidelight wiring
It powers the field winding to excite it.
Other alternator use the power coming down the warning light wire to do this instead.
Cheers,
Gavin :)

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Right on, im probably thinking it may be a frigged Alternator then! It was from fleabay so ive probably been shafted. Following the 1275GT Wiring Diagram the the wire goes direct to the large spade on the solenoid? Could i not just do this?

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

Hi,
Which wire we talking about here?
Cheers,
Gavin:)

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Brown and Blue Signal Wire

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

Im refering to this.

http://drcwww.uvt.nl/~bogaard/manual/1275gt.gif

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

Hi,
Don't do it, you'll just end up with a warm alternator and a flat battery!
Cheers,
Gavin :)

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Right, ill run a wire to the fuse box, what about the existing loom wires, shall i just isolate these from eachother. (the ones that go to the control box)

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

Yup :)

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Cheers Mate!

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

Hi,
No problem, let me know how you get on
Cheers,
Gavin :)

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Will be sorting this tomoz. Ill update tomorra aft!

Ta Mike

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/