SOHC.co.uk Forums > CB500/550
Loom and part i have labelled but ink faded
LesterPiglet:
Just replace the green. You won't be able to tell until it runs. I doubt a bad rectifier would cause that. It's been a short or reversed polarity.
Lobo:
The RECTIFIER changes the alternator's output from AC to DC.
The REGULATOR then regulates the voltage (which otherwise would rise unchecked with alternator speed) to a maximum of approx 14.5V. If OEM its a fairly mechanical device with breaker points within which should close at around 14.5V; this is adjustable vis a small screw. The points also need to be gapped / cleaned if the device not performing to spec.
Mike; I'm NOT saying this is the problem, but I am suggesting, if no other obvious causes to check out the REGULATOR.
As a simple 'starter for 10' if you open it up & find the points stuck / seized in the 'up' position you may have your answer. (although if 'ok' on this test you'll still need to verify they close @ 14.5'ish volts later on)
Simon
MikeM:
understood, i will check out regulator and rectifier and re wire, make sure all contacts are clean good clean earth contacts if that dont work i will chop it up ;)
Bryanj:
The most common reason for the loom earth lead to melt, especially if all others are OK, is a bad connection on the main earth lead at the engine end meaning that that small green wire takes starter current
Lobo:
...that makes a lotta sense, especially given the other leads ok.
Anyways, not an answer, but a read ..
http://www.dansmc.com/electricaltesting.htm
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version