Topic: Question on voltage reg.....

[TwoTired]

I'm trying to help.  But, electricity is unforgiving of vagaries or mistakes.  It's downright fascist in its demands.  You meet them or else!

Try this: set your meter selector to point to the Ω 200 section.
Place the probe tips together and note the reading.
Separate the probe tips and note the display reading.

Now, with the white and green wires disconnected from the Vreg connect them to the probes and note the reading on the meter's display.

Next place one probe on the green wire and the other on the case/cover of the alternator.
Next place one meter probe on the White wire and the other probe on the case/cover of the alternator.

Sorry if this sounds rigid and demanding, but electrical troubleshooting is like that.

Cheers,

[brcree]

No prob Two...rigid is ok....ok: green to white reading-9.0....green to case-1.3.....white to case-9.0

[TwoTired]

No prob Two...rigid is ok....ok: green to white reading-9.0....green to case-1.3.....white to case-9.0

Numbers don't add.
Green to case should be zero.  How could you get 9 Ω to case and Green from white when Green has 1.3Ω to case?

Place the probe tips together and note the reading.
Separate the probe tips and note the display reading.

For the CB750 the field coil is nominally 6.8Ω.  Which does not allow for much measurement inaccuracy.

I have to go out now for a few hours.  So, I'll be away from the computer for a bit.

Cheers,

[Spanner 1]

Were all messed-up here, folks. Poster we do not need 'key turned on'... were not testing for voltage here. No key on, por favor. We need to know if the field coil is good, which is tested thus;
The regulator has 3 wires to it. The white wire and the green wire go to the field coil. Disconnect them from the reg. and put your meter leads to white and green ( +,- doesn't matter to which lead ). Now, click your meter to it's lowest Ohms scale, (you report 200 ohms is the lowest 'click', we do not want the diode test setting, so stay @ 200 ohms scale ). What's the reading ?

[scottly]

also did a volt check across the g,w,and black wires on the reg.....g to w 0....g to b 9.5  with key on

Green to white should be the same voltage as the green to black. Your reading of 0 volts on the white terminal indicates a regulator problem, NOT a field problem. The contact points in the regulator should be checked and cleaned. Also, if you only have 9.5 volts at the black reg lead, you have a dead battery, or other problems in your electrical system. (I'm guessing run down battery)

[Spanner 1]

Scott, I believe he was testing with his meter on 'ohms' with the ignition 'on'...... above readings are not anything to go by....... as far as I can tell after re-reading his posts.... c'mon back OP !!

[brcree]

At the expense of making myself look stupid...and in this case i am....I would like to apologize to all for their time in trying to help an old fart out. Here was the prob.....maybe this will help others in the future. The Volt. Reg. wires were installed backwards........the metal cover was installed backwards sooo....the wires were as well. I didn't look to see the letters that were stamped on the tabs..........after looking at the schematic again...it hit me!!!!!!!!!! All is fine in Cafe land now...thanks again all for helping out an Ol Geeeezer.  Always remember....."KISS"...not the rock group...lol.