Quote:
Originally Posted by teoman
It is a signal wire so i doubt you would need such a high capacity relay (unless you want to open and close the output of the alternator).
There was a circuit design in a recentish thread that let you change the signal wire and have the alternator off or charge at a higher voltage. You could use such schemes to have the alternator charging wile you apply brakes.
|
Yes, Brucepick's solution was to interrupt the main output wire with a mechanical switch, hence the 200A relay. They're only about £15.
Not sure what you mean by the 'signal wire'. There's a couple of signal wires (i.e. that don't carry much current.) There's the IGNition wire that switches the alternator on in response to the ignition switch being switched on, and the battery voltage sense wire, which monitors the voltage at the battery terminals, so as to better regulate alternator output.
Perhaps the "recent thread" you mention concerned using the voltage sense wire and varying the voltage on that, going back to the alternator? Can you find that thread? I had thought it might be possible to put a small (AA?) battery in line with that wire, to increase the voltage above the point where teh alternatoir would decide it didn't need to put out any current itself. If that worked then rigging that up to brake lights or fuel cut-off event (?) would be quite straightforward.