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Post by terryvanman on Nov 21, 2017 12:32:39 GMT
My alternator isn't charging, any idea where I can get it repaired or if un-repairable where do I get a replacement one from please
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Post by johnwp5bcoupe on Nov 21, 2017 15:18:16 GMT
Are you sure it's the Alternator Terry? it may be the 4TR? 3AW?
There are a few recon ones on Fleabay just make sure you get the correct handed one!
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Post by petervdvelde on Nov 21, 2017 17:36:34 GMT
You could consider to buy a Lucas A127 which has a "in house" rectifier and regulator so you can remove the 4TR and the 3AW. When you buy this, then you are sure it will work and you don't need to find out if it is the alternator, 4TR or 3AW which is faulty.
Make sure you buy a LH one because it is fitted to the left side of the engine. Mechanically it fits without modifications. Electrically it is very easy. I can help you with that as i did this conversion to my daily.
This also charges better at low revs, i believe
Peter
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Post by harvey on Nov 21, 2017 18:55:56 GMT
Make sure you buy a LH one because it is fitted to the left side of the engine. LH and RH is nothing to do with which side of the engine it fits to, in fact on the P5B it fits to the RHS of the engine but is a LH alternator. You can change it anyway, although if buying new that's not ideal. |
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Post by petervdvelde on Nov 21, 2017 21:54:35 GMT
Hi Harvey,
I know you can modify it to fit but the alternator mounting has a thread where it meets the adjuster bracket and the hole where it is attached to the engine mounting bracket isn't threaded so its more convenient to buy the right one
Peter
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Post by Phil Nottingham on Nov 21, 2017 22:24:39 GMT
Check all the connections and plugs thoroughly and make sure the Field actuating relay 6RA clicks when the ignition is switched on and is supplying juice.
The brushes also stick and wear - usually one wears more than the other and swapping them round can often sort it till new ones can be bought
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Post by inspector0208 on Mar 6, 2019 19:03:12 GMT
hi I know its been a while but can you help me I am fitting a A127 alternator to my p5b any advice about where the wires go an d wire size your help would be great
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Post by Phil Nottingham on Mar 6, 2019 22:49:06 GMT
The main cable with the large Lucar will be OK provided it is in PVC not the cloth braided stuff. (Brown/White)
The smaller cable goes to the Ind or WL terminal. Disconnect the plug at the round 3AW canister and bridge the 2 coloured cables (Brown/White & Brown/Green together with a jump cable or just remove from the plug and join together and insulate. Make sure you do not connect to the black earth wire in the plug!
Disconnect the 4TR plug. Tie up or cut-off the old Field cables at the alternator end (they will not be live).
If you have to replace the main alternator cable it terminates under the dashboard in a Busbar affair with all the rest of the main battery wiring and ammeter shunt.
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Post by inspector0208 on Mar 7, 2019 19:56:51 GMT
many thanks for the quick reply it sounds quite straight forward but just to be clear to me the brown/white wire to the bus bar right behind the dash board I know where that is because I have just rewired the car could you explain the terminals ind/wl where they are sorry if I sound a bit thick once again I appreciate your help
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Post by Phil Nottingham on Mar 8, 2019 18:23:02 GMT
Yes it is but I really must refer you to the wiring diagram - it's not a complicated circuit but I am not prepared to risk misleading you. Coloured clear Pdf's of the diagram are available free to members - well worth the subscription.  The WSM and handbook has the original which although not very large is OK for this purpose |
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