Random voltage drop

[telecolin]

I have a strange issue with my 2006 ulysses. as I am cruising at 3-4k rpm, every once in a while my battery voltage will drop down to 12.2-12.4 for a few seconds, the lights will dim and I lose power. It then returns to normal. This only seems to happen at 3-4k rpm after it reaches temperature, not at idle or above 4000 rpm. I have replaced the voltage regulator and the battery. I did the test on the stator and it seemed to be within the manuals' spec. it is sometimes a single instance and sometimes it happens a number of times in a row. I'm at my wit's end with this issue. I have also checked and cleaned all grounds and all battery connections are tight.

Any help is greatly appreciated!

Colin

 

[Sirius815]

Possible vibration issue within connectors?

 

[telecolin]

I'll go back through and make sure they're all tight.

 

[user_deleted]

colin: check what's called your #77 connector plug. it is in the area of the front pulley cover. remove cover and you'll see large plug...that is it. it completes the wiring loom for the charging system and it's purpose is so that replacement of regulator/rectifier and/or stator is plug and play situation. they do seem to be a bit more problematic on 06-07 Ulys than firebolts and lightnings but don't know why. below is buell/H-D part # for what is called "connector repair kit". works well or you can build your own connectors but for $19 retail this kit if you need it is handy. hope that helps.
Y1312.02A8 is the H-D part #

 

[telecolin]

I replaced the 77 connector with the new style when it went on me last year.

 

[epion420]

I agree the 77 connector is problematic you will see arcing on the male side of the connector. I cleaned mine and added a fair amount of electrical grease