23-03-2018, 05:51 PM
(This post was last modified: 23-03-2018, 08:22 PM by Steve Jones.)
Thanks Terry. I'd read it through earlier in the week but it doesn't answer my question. It also uses some 'big electrical words' that I don't understand!!
However, after messing about with the thing for nearly a week and a half, I think I've cracked it. The diagram on the Speedex web site that I referred to above explains it exactly. In the English/Lucas system, the field is connected to earth. In the Continental system, the field is connected to D on the dynamo. To change from one system to the other takes no more than moving the field lead. I've spent the day swapping components over from a working car to a non-working car and I've worked out that the initial problem was caused by a failing armature in the dynamo. I did have a second, spare, 12v 2 brush dynamo that had never been used but substituting that caused the electronic gubbings to throw a fit when I tried it earlier in the week. It's only today that I've realised that the cause of that was that the 'new' dynamo had been wired for positive earth rather than negative. Easy when you know. If you set it up on the bench as a motor, it spins in the wrong direction!! I've now got a working electronic system again and also now know how to change to a mechanical regulator if I wish.
Steve
However, after messing about with the thing for nearly a week and a half, I think I've cracked it. The diagram on the Speedex web site that I referred to above explains it exactly. In the English/Lucas system, the field is connected to earth. In the Continental system, the field is connected to D on the dynamo. To change from one system to the other takes no more than moving the field lead. I've spent the day swapping components over from a working car to a non-working car and I've worked out that the initial problem was caused by a failing armature in the dynamo. I did have a second, spare, 12v 2 brush dynamo that had never been used but substituting that caused the electronic gubbings to throw a fit when I tried it earlier in the week. It's only today that I've realised that the cause of that was that the 'new' dynamo had been wired for positive earth rather than negative. Easy when you know. If you set it up on the bench as a motor, it spins in the wrong direction!! I've now got a working electronic system again and also now know how to change to a mechanical regulator if I wish.
Steve