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12th April 2020, 09:24
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#1
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Newbie
Join Date: Dec 2017
Posts: 17
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Alternator wiring/battery not charging
After a long time being sat, a trying a few alternators and various people attempting to get the the bottom of the battery not charging, this 2002 VTS has the alternator wiring in a bit of a state.
As a starting point to trying to get this back on the road, does anyone know which way round these wires attach to the alternator?
Thanks
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12th April 2020, 09:33
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#2
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Newbie
Join Date: Dec 2017
Posts: 17
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12th April 2020, 10:52
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#3
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Newbie
Join Date: Dec 2017
Posts: 17
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The terminals on the alternator are L (D+) and DFM
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12th April 2020, 13:01
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#4
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Saxperience Forum Bum
Join Date: Dec 2012
Location: Perth
Posts: 3,663
Car(s): Peugeot 106 1.1 Turbo
Peugeot 106 1.5D Turbo
Peuge
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Looks like someone has cut the wiring and fitted a second plug????
Those 2 wires on the loom need to connect to the 2 small wires on the alternator.
I can't remember, but the loom red wire goes to the brown on your plug and the green/blue goes to the yellow one. I think that's the correct order. I'm not 100%.
If you can find another picture of a post 2000 saxo/106 you will see the colours. I don't have my spare wiring loom here, otherwise I'd give you a 100% answer.
__________________
The rain kept a trollin'
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12th April 2020, 13:53
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#5
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Newbie
Join Date: Dec 2017
Posts: 17
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Yes it looks that way. I believe this is the 3rd alternator to be swapped in.
So I've tested continuity of the alternator warning light (1072, liliac wire) to the D+ on alternator from chassis plug, also continuity of DFM terminal to the ECU and charging post on alternator to positive battery terminal.
Now with the car on, the warning light is off and no difference between charging post of alternator and battery positive.
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12th April 2020, 18:01
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#6
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Newbie
Join Date: Dec 2017
Posts: 17
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Battery light off and battery not charging. Anyone got any ideas?
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12th April 2020, 19:48
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#7
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Saxperience Forum Bum
Join Date: Dec 2012
Location: Perth
Posts: 3,663
Car(s): Peugeot 106 1.1 Turbo
Peugeot 106 1.5D Turbo
Peuge
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Quote:
Originally Posted by bifrogifro
Battery light off and battery not charging. Anyone got any ideas?
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There won't be a potential between the positive post of the alternator and the positive post of the battery... they're connected!
What's the voltage across the battery when its running?
__________________
The rain kept a trollin'
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12th April 2020, 20:04
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#8
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Newbie
Join Date: Dec 2017
Posts: 17
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Voltage across battery is ~12V. I meant no difference between alternator charging post to ground and battery positive to ground, sorry if that was unclear.
No notable voltage drop on either side and good continuity to ground... 
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The Following User Says Thank You to bifrogifro For This Useful Post:
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12th April 2020, 20:21
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#9
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Established Member
Join Date: Aug 2012
Posts: 2,009
Car(s): Saxò VTS 16v
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14th April 2020, 11:26
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#10
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Saxperience Forum Bum
Join Date: Dec 2012
Location: Perth
Posts: 3,663
Car(s): Peugeot 106 1.1 Turbo
Peugeot 106 1.5D Turbo
Peuge
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Must be a break in a wire somewhere, or a blown fuse.
unless the alternator is actually dead?
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