Reply to "ignition light does not go out"

Based on the helpfull comments I checked my engine. I cannot find a regulator which should be located at the backwall of the passenger seat.

My car has a stroked engine with 393 cui which was bought by the last owner in 2009 from the company "D&J Machine & Perfomance engine" in Phoenix,AZ. I have the original invoice of the new engine and the price was 4,895 US$. Since 2009 the car was driven about 3,500 miles.

Because the engine is polished and everything looks like new I suppose that the garage put in a new alternator with an intergrated regulator. Unfortunately the access to the alternator is very limited and so far I refused to open the backwall behind the passenger seat to check it.

So I suppose that the signal from a new alternator is not compatible with the regulator output and so the voltage from the alternator is not switching off the lamp.

In my Jaguar E-type Lucas ignition control light are connected differently. I also switched to a modern alternator. Lucas is using a thermorelais with a pin from ignition (+12V) and a pin from the alternator. When the alternator is not charging the relais is connected to ground. When alternator charges the thermoelement is heated and disconnects the ground.

In the next couple of weeks I need to check my alternator outputs and find a solution.

thanks