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GS1100ES, unexpected voltage drop

  • Thread starter Thread starter Dirk62
  • Start date Start date
D

Dirk62

Guest
The battery light came on sometime this summer on my abused and much-jury-rigged Suzuki. The idiot lights have been sporadic anyway, but just in case, I followed the recommendations in the Stator Papers and ran the trouble-shooting tests.
The stator is good, and the rectifier passes the diode test. I'm chasing the wiring to ensure good connections (and ran my RR ground directly to the battery Neg)
The puzzling part is that my voltage at idle is 14.2, and drops gradually to about 12.9 at 5K RPM. Any ideas why?
 
Hi,

Check the voltage loss between the r/r output and the positive battery terminal. It should be 0.2v or less at 4000 rpm, the smaller the better.

This is usually caused by corroded connections between the r/r output and the battery, through the fuse box and other connections. Make sure all of the frame/ground connections are clean too. See the electrical section of my website for lots of tips and procedures.


Thank you for your indulgence,

BassCliff
 
Dirk62 said:
The battery light came on sometime this summer on my abused and much-jury-rigged Suzuki.
...
...
Click to expand...

I dont know the ESes, but is the battery light related to one of those probes into the battery?
If so, I thought I saw some comments about that being more related to fluid level in that cell, and not so much the battery voltage.

.
 
Thanks for the help, guys. my battery levels are OK. I ran the test suggested and got .38 volts at idle and about .14 at 4000 RPM. Basscliff said to run that test at 4000 RPM, but I noticed the Stator Papers IV said to do it at idle. Not sure if my readings indicate a healthy circuit or not.
 
Dirk62 said:
The stator is good
Click to expand...

What are the results of your stator test to make you think its good ?

Are all the wire connections good, clean and solid ? If you got 50vac on all legs of the stator Id say your RR is shot.
 
Bonanzadave, the stator voltage was low 70's at 5K RPM on all three circuits. I'll double-check my connections. I don't know bupkis about RR's but intuitively I assumed that internal failure would be total, on at least one diode. This incremental voltage shortfall does seem to point to general harness condition. I'll look at the RR again. Thanks for the input!

Best
Dirk
 
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