penultimate
New member
Apologies for returning to the forum but I'm at my albeit limited wits end with a charging problem. On the advice of forumites I replaced the original 14v 2.5w lamp with a 12v 2.2w. The initial field current , as expected, was 0.2 amps and was insufficient to excite the alternator. If I short out the ignition warning light the field current is 4 amps and charging proceeds normally and regulation is fine.
I have tried replacing the 12v 2.2w lamp with 12v 5w, and the field current, as expected, was 0.4 amps; but still insufficient to excite the alternator.
The S.E.V. Marchal brushless alternator has been tested OK; and the original Bosch 3 pin regulator which was found to be defective replaced with new (£8).
The disadvantages of running with the ignition warning light permanently shorted out are that there is no warning of charging failure and that the ignition can be inadvertently left switched on after stopping the engine.
What can possibly be the problem?
I have tried replacing the 12v 2.2w lamp with 12v 5w, and the field current, as expected, was 0.4 amps; but still insufficient to excite the alternator.
The S.E.V. Marchal brushless alternator has been tested OK; and the original Bosch 3 pin regulator which was found to be defective replaced with new (£8).
The disadvantages of running with the ignition warning light permanently shorted out are that there is no warning of charging failure and that the ignition can be inadvertently left switched on after stopping the engine.
What can possibly be the problem?