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Posted: Fri Feb 22, 2008 4:13 pm 
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Just moving this one outta the 6 cyl garage guys.

Nothing to see here :)

 

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Posted: Fri Feb 22, 2008 8:24 pm 
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Just to clarify things a little, cars don't have an "EARTH", they have a "GROUND".
Earths are for AC sysytems and Grounds are for DC systems...

I had a quick skim through the links provided and saw nothing regarding the starter motor, I am pretty sure that the starter motor WILL run backwards, it was already mentioned about the blower motor but any motor needs to be thought about regarding direction cjanging to a negative ground....

 

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Posted: Sat Feb 23, 2008 12:35 am 
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If memory serves me right any of the slightly later, negative ground, starter motors will bolt in if thats the case. My one, from a Pursuit 170 fitted ok.
Cheers,
Paul

 

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Posted: Sat Feb 23, 2008 11:18 am 
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You'll find the existing starter will work fine - reversing polarity on the armature also changes the field windings.
If you're worried about this, pull the starter and test using jumper leads.

 

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Posted: Sat Feb 23, 2008 9:56 pm 
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snap0964 wrote:
You'll find the existing starter will work fine - reversing polarity on the armature also changes the field windings.
If you're worried about this, pull the starter and test using jumper leads.



I am pretty sure that the direction will be reversed, I know for a fact that on an AC motor that you need to reverse the armature or the field but not both to reverse it but on DC reversing the polarity of supply will reverse the motor...

 

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Posted: Sat Feb 23, 2008 10:57 pm 
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The armature will reverse polarity, and so will the field windings, so the direction of rotation will not change.

 

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97 EL Futura S/W: LPG, Alarm, LED int Lts, Trip Comp, F/Lane Dome Lt, Climate Ctrl, T5 Conversion

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Posted: Sun Feb 24, 2008 6:18 pm 
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snap, you are correct in respect to series wound motors, it has been many years since I did dc machines, BUT, starter motors are usually permanent magnet motors so they have no field windings unlike series motors which you were referring to and so with a permanent magnet motor a reversal of polarity WILL reverse the motor which is how power windows reverse and power aerials etc.....

 

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Posted: Sun Feb 24, 2008 8:47 pm 
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Falcon starters are series/parallel wound motors, i.e. the fields are in parallel to each other, but in series to the armature.

 

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Posted: Sun Feb 24, 2008 9:34 pm 
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I will have to take your word on that one but what about the really old ones like the post was about?

 

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Posted: Sun Feb 24, 2008 9:35 pm 
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All the starters I have seen over the years have been permanent magnet style...

 

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Posted: Sun Feb 24, 2008 10:40 pm 
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XK to AU starters are interchangeable.

 

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97 EL Futura S/W: LPG, Alarm, LED int Lts, Trip Comp, F/Lane Dome Lt, Climate Ctrl, T5 Conversion

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