SOHC.co.uk Forums > CB350/400
Defective battery or charging problem or other?
billdn:
Mike/Bryan
Voltage regulator check
Battery 12.2v
Black wire on regulator 11.7v
White wire. " 0v
Green wire. " 0v
billdn:
As battery low, put on charged spare and as I had spare ( used) regulator thought I'd swap around to see if any difference, please see below
Regulator 1
Battery volts engine running 12.59v
Black wire on regulator 12 .12v
White wire 0 v
Green wire 0 v
Regulator 2
Battery engine running 12.60v
Black wire 12.2v
White wire 3.4v
Green wire 0v
Now I'm really confused , ignition switch strip next ps still no horn but guess related to switch?
Bryanj:
Regulator 1 has a fault, Regulator 2 needs the contacts cleaning and somewhere between battery +ve and black at reg is a corroded or bad connector, try cleaning ign switch contacts and retest
mike the bike:
Try shorting the white (regulator output) to black (supply). You'll probably find the battery now charges. Don't leave it shorted, this is only a test. You don't want to cook your battery.
If it goes as I've suspected, you need a new regulator.
You can use a combined rectifier/regulator.
billdn:
Thanks Bryan,
just out of interest what voltage should I be looking at regulator black, green and white for future reference. Ignition switch removed, please please don't ask me to to do that again , that was a devil getting that out and back. Ignition switch is about 7-8 years old as having been replaced before but looked ok and cleaned up terminals to ignition connector block.
Did you see message yesterday about testing yellow wires and using jumpers for white and green - was i doing something wrong?
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