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Anders Dinsen
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« Reply #10 on: November 20, 2006, 11:59:55 pm » |
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The extra plus on the 55A alternator goes to the diagnostic socket where it can be used to check the alternator - it's actually not directly connected to the battery plus but to the minus side of the rotor which is pulled to minus by the regulator thereby allowing the alternator to charge. On the diag socket it would show a pulsing signal on a working alternator. Lennart is right that the charge lamp is a critical component as it supplies the current to power the rotor coil until the alternator starts producing energy by itself. There is an 82 Ohm resistor fitted in parallel with the charge lamp up, this is probably critical. The other side of the regulator needs an earth connection which it should have through the alternator chassis according to the docs, but if that isn't working properly the rotor is never energised and the generator will not work. There could be a few bugs here I found this link when I looked around for info on this: http://www.1stconnect.com/anozira/SiteTops/energy/Alternator/alternator.htmEspace-Murena has a diagram of the 55A alternator here: http://www.espace-murena.com/Fichiers/ManuelAtelier/Da3a403.pdf- Anders
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1982 Talbot Matra Murena 2.2 prep 142 2017 BMW i3 "Charged Professional" 94Ah
Used to own: 2001 Renault Matra Grand Espace "The Race" V6 24v 1997 Renault Matra Espace 2.0 8V 1987 Renault Matra Espace J11 2.2
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Anders Dinsen
Administrator
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Posts: 3186
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« Reply #14 on: November 21, 2006, 09:01:35 am » |
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I think there's something not connected on the new alternator Yahh sure seems like it... I dont know what that should be though... I presume that the terminals are layed ot the same as on the 55amp. (sure looks like it though no witing can be found on the alternator..) However... the BIG RED wire go to the BIG connecion on the alternator... the plug gost.. well where the plug goes.. and the damper goes from the small connetion to the b+ (also known a th BIG connection)..... shouldnt really be that hard.. There should be an additional earth wire somewhere that has to be connected to chassis. This is the ground connection for the regulator. I think this is what you call the "small connection", i.e. the ground side of the noise suppressor. From the above I think you are missing that. This is the engine room ground - it runs in the wiring loom and connects to the diag socket, to the ignition module and to a ground terminal, I think it's sitting above the ignition coil somewhere, but can't recall. It certainly won't charge if that is missing as this is the ground connection for the rotor coil (the current running in that controls the output voltage of the alternator - no current, no output). If this had been missing on the old alternator perhaps it could have charged a little by current flowing going by "unauthorized" routes? This may be the problem with the old one...
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« Last Edit: November 21, 2006, 09:06:51 am by Anders Dinsen »
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1982 Talbot Matra Murena 2.2 prep 142 2017 BMW i3 "Charged Professional" 94Ah
Used to own: 2001 Renault Matra Grand Espace "The Race" V6 24v 1997 Renault Matra Espace 2.0 8V 1987 Renault Matra Espace J11 2.2
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