17-09-2017, 07:32 AM
The cutout simply isolates the dynamo when its output is too low to be useful.
The battery and state of influences system running voltage rather than governing it.
On a modern the charge voltage is regulated/governed to a fixed say 14 volts and this is achieved under most running conditions, whereas the Seven can range from 8v to 6v or less in commonly achieved extremes. The owner is expected to use the Summer charge to avoid overcharging and hence the high volts.
Immediately after charging, a full battery may read 7v or more with no drain taken. The “true” voltage only shows after a significant drain
None of which is really relevant to your “problem”
I am a bit surprised at the measured voltage loss thru the master switch as this presumably handles hundreds of amps of starter current. .2 v at 10 amps would be 4 volts at 200 amps!
The drop across the light switch also seems considerable. If the voltage remains near 5.7 across the taillamp, you seem to have proved that earthing is not the problem. What drops do others measure directly across light switch?
The battery and state of influences system running voltage rather than governing it.
On a modern the charge voltage is regulated/governed to a fixed say 14 volts and this is achieved under most running conditions, whereas the Seven can range from 8v to 6v or less in commonly achieved extremes. The owner is expected to use the Summer charge to avoid overcharging and hence the high volts.
Immediately after charging, a full battery may read 7v or more with no drain taken. The “true” voltage only shows after a significant drain
None of which is really relevant to your “problem”
I am a bit surprised at the measured voltage loss thru the master switch as this presumably handles hundreds of amps of starter current. .2 v at 10 amps would be 4 volts at 200 amps!
The drop across the light switch also seems considerable. If the voltage remains near 5.7 across the taillamp, you seem to have proved that earthing is not the problem. What drops do others measure directly across light switch?