Fazer 1000 charging issue rear light voltages

[Tuckerhauser]

Evening
Noticed over a while that my  04 fazer has been more and more difficult to start fired but was spinning over slower, anyway other week wouldnt fire turned out battery was low so I put it on charge. Was odd as ive been using the bike and it hasnt been standing around.
Measured the voltage across the battery at 5k revs and the reading was only 13.5v book says it should be 14 to 14.8
And at idle its less than 13v
Know I could keep the bike on a optimate but this is a pain, plus at this time of year ill be needing my heated grips and heated kit applying extra strain on electrics

being a ex aprillia owner thought it was the stator but the readings from the stator all check out resistance and ac voltage
Mate has a fazer so I borrowed his rectifier to see is that made and difference it didn't and was getting the same 13.5v across the battery at 5k
Had the white connectors in the charging circuit apart and cleaned
Starter relay out cleaned and the battery terminals/conectors cleaned too plus the earth next to the starter motor
Borrowed mates battery
Still no joy
I found a thread on here called "voltage drop mod" which recommended running another wire from the + output on the rectifier to the battery ive also tried this with no success

Ive also got a problem with the rear lights when either indicator is in use the rear light dims slightly, doesnt matter if the engine is running or not it still dims
Ive checked for corrosion and the connectors all look good. Ive measured the volts at the rear light and it drops by . 5v when the indicator flashes.

I ran a temporary wire direct from the battery to the rear light and this stopped the rear light dimming.

Dont think these issues are related but never know

I keep thinking its a earth issue but other the one off the battery dont think theres another to find!

Thanks

[slappy]

Sounds like a bad earth to me too, have you tried replacing the main earth wire?
Also I think there are a couple more earth wires coming off the loom, but I do not have a wiring diagram to check, the alternator and rectifier might also have poor earths so worth while checking these.
As with most electical gremlins it is usually frustratingly long winded trying to cure them.

[Tuckerhauser]

Yeah im gonna check the wiring again!
Is there a updated wiring diagram for bikes after 2003 as ther light switch was removed!
The diagrams ive found are for bikes with a light switch pre 03

Ta

[slappy]

Sorry can't help with wiring diagram, but someone on here must know.

[Tuckerhauser]

replaced the main earth cable tonite with a old one I had from a scrap Bmw loom, but still no joy
Think the main cable is just the engine earth. Rear lights still worked when earth  wasn't connected to engine.
I can only find one earth from the loom that goes thru a little connector that sits in a rubber grommet on top of the battery. When it's disconnected I get no light at all at the rear of the bike. Take it from that there's only one earth on the loom.
I tried running a wire from the ground on the rear light direct to the neg on the battery but light still dimmed with the Indy.

Starting to think it's time to take to a auto electrician

[sadlonelygit]

Measured the voltage across the battery at 5k revs and the reading was only 13.5v book says it should be 14 to 14.8
And at idle its less than 13v

the book is wrong, hth
12.7 ish on t/o and 13.6 ish max

for a 6 cell 12v battery 14.7 is the theoretical maximum charge it can take............so 14.8 would make it go pop

i would hazard a guess you need a new battery rather than a new stator

[Tuckerhauser]

Both the service manual and Haynes manual state that 14v should be the minimum at the battery at 5K revs

I've replaced the battery and the problems are still there:-(

Ta

[Tuckerhauser]

Sorted the low voltage at the battery at 5k I ran a extra + & - wire direct to the battery from the rectifier:-)
Used a 30amp fuse in line on the + wire

[An9dy]

I have the same problem with my rear lights dimming in sequence with my indicators (my mate following me tells me).
Do you have a photo of where you made the new wiring connections?
regards


Andy