16-09-2017, 01:11 PM
I have a Ruby with a standard 6V charging system. I'm finding there is a voltage drop when the headlights are on which is sufficient to dim the rear lights (especially the LED ones which almost go out). Its not an earthing problem.
The voltage at the battery is 6.2v (measured with an analogue multimeter). There is a drop of about 0.2v across my new battery master switch and another drop of around 0.3v across the headlight /sidelight switch. Perhaps another small drop elsewhere giving an insufficient 5.6v at the rear. With the headlights off I get the full 6.2v back again. The voltage measured at the battery itself doesn't ever change.
Several questions. Firstly is 6.2v normal for a fully charged battery? - I always understood that a healthy battery should be nearer 7 volts. It's only a year old and turns the engine over for ever and a day without getting tired. Second question, is a 0.2 or 0.3v drop normal for a switch? Thirdly, if 6.2v is too low, can I adjust the cut out in anyway?
I'm coming from a position of electrical ignorance so simply-worded replies would be appreciated!
Peter Naulls.
The voltage at the battery is 6.2v (measured with an analogue multimeter). There is a drop of about 0.2v across my new battery master switch and another drop of around 0.3v across the headlight /sidelight switch. Perhaps another small drop elsewhere giving an insufficient 5.6v at the rear. With the headlights off I get the full 6.2v back again. The voltage measured at the battery itself doesn't ever change.
Several questions. Firstly is 6.2v normal for a fully charged battery? - I always understood that a healthy battery should be nearer 7 volts. It's only a year old and turns the engine over for ever and a day without getting tired. Second question, is a 0.2 or 0.3v drop normal for a switch? Thirdly, if 6.2v is too low, can I adjust the cut out in anyway?
I'm coming from a position of electrical ignorance so simply-worded replies would be appreciated!
Peter Naulls.