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Lumpy then no start a few days after dynamo to alternator conversion
Posted: Sun Dec 29, 2024 12:06 pm
by Rosemore
Hi all, I thought I had successfully completed a dynamo to alternator conversion and everything was running smoothly for a few days. Then Friday morning, I had to turn back home as things were really really lumpy, rough driving and couldn't reach the top of the road. I got home though but now the car won't start. Lights come on and I hear the petrol pump with the usual starting sounds but the engine doesn't kick off. I'll check for a spark soon. I've ordered a coil just in case.
They advise you to connect one of the wires to the chassis for negative which I did but I may not have had a good connection. Could that have damaged anything? What's the best way to troubleshoot? Thanks in advance.
Re: Lumpy then no start a few days after dynamo to alternator conversion
Posted: Sun Dec 29, 2024 1:37 pm
by philthehill
Just to clarify is it a alternator to dynamo conversion (as stated above in the thread) or a dynamo to alternator conversion as per title of the thread?
I do not know what wiring diagram you are using but the diagram as shown below is the one I use:-
- alternator wiring diagram.jpg (407.64 KiB) Viewed 5498 times
Re: Lumpy then no start a few days after dynamo to alternator conversion
Posted: Sun Dec 29, 2024 2:04 pm
by Rosemore
Thank you. Problem solved, it was the cable leading to the coil. Yeah it was dynamo to alternator.
Thanks for your diagram, I connected all four cables on the first two junctions, A and A1 together.
Re: Lumpy then no start a few days after dynamo to alternator conversion
Posted: Sun Dec 29, 2024 2:28 pm
by geoberni
Are you actually saying you went to all the trouble of reversing an Alternator conversion, just because it started to run rough after a few days??
The fact they you've said
I'll check for a spark soon. I've ordered a coil just in case.
Just makes me go...
Why do the latter without the former.....
Checking for a spark is easy.
Why spend £20 on a coil, 'just in case'... ????
Re: Lumpy then no start a few days after dynamo to alternator conversion
Posted: Sun Dec 29, 2024 4:22 pm
by Rosemore
geoberni wrote: ↑Sun Dec 29, 2024 2:28 pm
Are you actually saying you went to all the trouble of reversing an Alternator conversion, just because it started to run rough after a few days??
Nooo, still with the alternator. I figured it might be the coil as it was so lumpy, I didn't want to be without. I can return it, Amazon prime
Re: Lumpy then no start a few days after dynamo to alternator conversion
Posted: Sun Dec 29, 2024 7:16 pm
by geoberni
Rosemore wrote: ↑Sun Dec 29, 2024 4:22 pm
geoberni wrote: ↑Sun Dec 29, 2024 2:28 pm
Are you actually saying you went to all the trouble of reversing an Alternator conversion, just because it started to run rough after a few days??
Nooo, still with the alternator. I figured it might be the coil as it was so lumpy, I didn't want to be without. I can return it, Amazon prime
Sorry, just me misreading the first part...