Hi all,
new here but have had the Pan for a couple of years. This morning on my way into work, I noticed that it's not charging well. Normally, the voltmeter sits happily around the 14V mark, as you'd expect. This morning - below the 12V mark. Not great. It was slowly getting worse as I went on (I ride about 35 miles each way to work) so I knocked off all ancillaries and headlights. It managed to stay steady at a little under 12V that way. Would dip under braking but pick up again on acceleration.
I've done alot of digging on this site through the morning and found some measurements to check against on this thread: https://www.st-owners.com/forums/showthread.php?132697-VRR-voltage-ST1100-28amp . So, I've taken a little time out of work to see what I get.
VRR readings:
Yellow->R/W should be 7.5 kOhm actually 6.8 MOhm
White->R/W should be 60 kOhm actually 6.8 MOhm
White->Yellow should be 28 kOhm actually 8 Mohm (x2) and open circuit for the other
Alternator readings:
Yellow->Yellow should be 0.4 Ohm actually 0.1-0.2 Ohm
White->Black should be 0.4 Ohm actually 2.3 Ohm
This is an ex military police bike, so I'm aware that things aren't always as on most factory Pan's. Particularly, I believe there is some sort of uprating on the charging system, though I'm guessing (from all the research I've done today) that it's still only a 28A alternator. However, the alternator readings look ok-ish to me whereas the VRR readings looks horrific.
So, am I right in assuming the VRR is shot, or is further investigation required?
It seems to bump alright so I'm hoping I'll make it home this afternoon..........
new here but have had the Pan for a couple of years. This morning on my way into work, I noticed that it's not charging well. Normally, the voltmeter sits happily around the 14V mark, as you'd expect. This morning - below the 12V mark. Not great. It was slowly getting worse as I went on (I ride about 35 miles each way to work) so I knocked off all ancillaries and headlights. It managed to stay steady at a little under 12V that way. Would dip under braking but pick up again on acceleration.
I've done alot of digging on this site through the morning and found some measurements to check against on this thread: https://www.st-owners.com/forums/showthread.php?132697-VRR-voltage-ST1100-28amp . So, I've taken a little time out of work to see what I get.
VRR readings:
Yellow->R/W should be 7.5 kOhm actually 6.8 MOhm
White->R/W should be 60 kOhm actually 6.8 MOhm
White->Yellow should be 28 kOhm actually 8 Mohm (x2) and open circuit for the other
Alternator readings:
Yellow->Yellow should be 0.4 Ohm actually 0.1-0.2 Ohm
White->Black should be 0.4 Ohm actually 2.3 Ohm
This is an ex military police bike, so I'm aware that things aren't always as on most factory Pan's. Particularly, I believe there is some sort of uprating on the charging system, though I'm guessing (from all the research I've done today) that it's still only a 28A alternator. However, the alternator readings look ok-ish to me whereas the VRR readings looks horrific.
So, am I right in assuming the VRR is shot, or is further investigation required?
It seems to bump alright so I'm hoping I'll make it home this afternoon..........