Originally Posted by Polwart
Mike, assuming they haven't changed the colour codes at some point then you are looking at the following for Yamaha:
Yellow: +12V dc when ignition key is turned on.
Green: tacho signal
Black: ground (-ve battery).
Red: +12V contantly on (even with key off).
Hope that helps.
Prob not-it's an Evinrude
It's probably running the main charging circuit directly to the battery via the starter solenoid power 'in' if no-one's messed with it.
You need to fire the engine up on muffs with a voltmeter across the battery to check if it's charging.The voltage across the battery will rise after if's started if it's charging.
If the voltage across the battery goes above about 14.4v when you blip it then there's no regulator in the circuit.
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