Italian electrics |
Post Reply | Page <12 |
Author | ||
Adam
Senior Member Joined: 19 Jul 2017 Location: UK Status: Offline Points: 127 |
Post Options
Thanks(0)
|
|
No weedy thin wires or it'll act like a light bulb😃
|
||
Hackney
Falcone Joined: 17 Feb 2018 Location: London Status: Offline Points: 17 |
Post Options
Thanks(0)
|
|
So here are the results of my investigations so far:
New battery left to stand for 6 hours after filling, then charged overnight on an oxford oximiser 3x charger voltage testing battery disconnected 12.95 ignition off 12.94 ignition on 12.58 startup drops to 10.4 then back to 13.1 at idle at 3000rpm 13.4
so the battery seems good and the charging system seems to be working.
measuring ampage connecting the meter in series between the battery negative terminal and the battery negative connector, taking all but the main 30amp fuse out then adding each fuse in sequence.
30 amp fuse only 7.7 m/amps initially this reading spiked and fluctuated when I first started to test but settled after 30 seconds or so then adding in the other fuses one by one 5 amp 10 m/amps 5 amp 50.2 m/amps 15 amp 50.2 m/amps 15 amp 50.2 m/amps 15 amp 50.2 m/amps
then the ABS fuse 20 amp 50.2 m/amps
so the biggest jump was
the 5 amp that feeds the instrument panel, turn indicators and
bluedash. No idea what bluedash is.... main beam indicator? Onwards and upwards!
|
||
iansoady
Senior Member Joined: 23 Jul 2017 Location: Redditch Status: Offline Points: 2402 |
Post Options
Thanks(0)
|
|
50 mA is 1/20th of an amp so would take 20 hours to lose 1 amp-hour of capacity. I don't know what your battery capacity is but say it was 30 amp-hour that should not drain in 2 weeks, although it would be down to some extent. 13.4 volts sounds on the low side for charging at 3000 rpm but I'm not familiar with your system. I'd expect slightly over 14.
|
||
Ian
1952 Norton ES2 1986 Honda XBR500 1958-ish Greeves/Triumph in progress |
||
Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
Post Options
Thanks(0)
|
|
Did you add the fuses, or put one in after taking the others out? In other words did you check the drain on each fuse by itself? Do you have a 50mA drain on each of the 15A fuses? Or did you have a 10mA on the first + 50 on the second + 50 on the third etc. I suspect not, but your test would have told more if you only had one fuse in at a time. The dash also contains the clock, and various other bits like the trip readings which are kept alive by the battery.
|
||
Brian.
Better 5 minutes late in this world than years early in the next. |
||
Hackney
Falcone Joined: 17 Feb 2018 Location: London Status: Offline Points: 17 |
Post Options
Thanks(0)
|
|
Hi iansoady,
the battery is a 12v 12Ah (10hr). I calculated that it would take 10 days to die completely.
Hi Brian, no i added each fuse to the last working from the main fuse up noting the difference at each step to give a figure. SO the main fuse had a 7mA draw, the second fuse (5amp) added 2.2 mA to the draw and the third (5amp) added the other 40 mA. Would testing each one separately have given me a different reading do you think? |
||
Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
Post Options
Thanks(0)
|
|
Probably not, just saves the maths. I'm sure those figures are quite normal. Remember ten days to die completely means rather less time before you can't start the engine. I hate these tiny batteries. Can't remember offhand what each fuse controls, but removing the second 5A fuse if leaving the bike would make quite a difference.
|
||
Brian.
Better 5 minutes late in this world than years early in the next. |
||
Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
Post Options
Thanks(0)
|
|
Looking at the wiring diagram, fuse d (5A) feeds the dash, and I'm assuming that's the one which has the higher current draw. The only problem with removing that fuse is you lose your trip reading and have to reset the clock.
|
||
Brian.
Better 5 minutes late in this world than years early in the next. |
||
nab301
Senior Member Joined: 29 Oct 2017 Location: Dublin Ireland Status: Offline Points: 443 |
Post Options
Thanks(0)
|
|
Maybe I was in kickstart (battery) mode ... |
||
Nigel
Keep smiling , it makes people wonder what you've been up to! '19 CB125F, '18 DL250 SUZUKI V STROM,'99 Bmw R1100S, '03Bullet 65 500, '93 MZ301 Saxon fun (offroad) |
||
TooJuicy
Senior Member Joined: 06 May 2015 Location: Guildford, Surr Status: Offline Points: 759 |
Post Options
Thanks(0)
|
|
I don't know about the V7 in particular but I believe 12v charging systems usually provide -/- 14.4 volts DC The Guzzi 1200 Service Manual quotes 14.2 - 14.8 volts at 5,000rpm as the acceptable range. This low charging voltage however does not explain the quick discharge of the battery from 12.95v. I must say I never leave my battery more than a few days off its charger. Although when new it once lasted 2 weeks not on a charger, but the battery's performance declined after THAT experience TONY
Edited by TooJuicy - 24 Jun 2018 at 23:21 |
||
Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
Post Options
Thanks(0)
|
|
13.4v is on the low side. Check all the connections round the regulator including the earth. I have known batteries to show almost 13 volts just off charge, but if the charging voltage is low, they do discharge quickly.
|
||
Brian.
Better 5 minutes late in this world than years early in the next. |
||
iansoady
Senior Member Joined: 23 Jul 2017 Location: Redditch Status: Offline Points: 2402 |
Post Options
Thanks(0)
|
|
If you check when you've just been charging the battery, you often get a spuriously high reading due to a surface charge effect. If you leave it for a couple of hours (or swith the headlight on for a few minutes) you get a more realistic reading.
|
||
Ian
1952 Norton ES2 1986 Honda XBR500 1958-ish Greeves/Triumph in progress |
||
Hackney
Falcone Joined: 17 Feb 2018 Location: London Status: Offline Points: 17 |
Post Options
Thanks(0)
|
|
I've got the battery back on the charger to see if i can get any more into it, the charger has a maintain mode which apparently takes it from 80% charged to 100% so I'll see if another overnight makes a difference.
The battery was about 60 quid, is this super cheap? I thought it was normal but I've seen them at nearly 200 quid so am i being a cheapskate?
Outside of that I've read on another forum that pulling the fuse could be seen as a charming guzzi quirk! Would rather get it sorted but taking the clocks apart is way beyond me atm so pulling the fuse wins |
||
iansoady
Senior Member Joined: 23 Jul 2017 Location: Redditch Status: Offline Points: 2402 |
Post Options
Thanks(0)
|
|
If this keeps happening I'd be tempted to install a switch rather than keep pulling the fuse. It doesn't sound right to me though.
|
||
Ian
1952 Norton ES2 1986 Honda XBR500 1958-ish Greeves/Triumph in progress |
||
TooJuicy
Senior Member Joined: 06 May 2015 Location: Guildford, Surr Status: Offline Points: 759 |
Post Options
Thanks(0)
|
|
It's too late this time but the advice I seen on charging pre-charged unfilled batteries is that, after the wait period you mention, fully charge the battery before use. Fully charge means wait to the Bulk then Absorption stages to finish (using CTEK charger terminology), that is when the charge rate drops from 14.4v to 13.2v. 13.2v is the low voltage charging state is called the Float charge. The new battery should now be left on Float charge for a further 24 hours. Add 24 hours on float to the 6-20 hours to reach Float and you have a fairly long first charge after filling battery and waiting for battery to "rest". 48 hours on charger is not wrong. As for £60, I cannot say how much is normal for a V7 battery, but is it a reputable brand (Yuasa, Varta)? The Yuasa battery for my 1200 cost £100 but that's bigger unit, 18ah. Tony
|
||
Hackney
Falcone Joined: 17 Feb 2018 Location: London Status: Offline Points: 17 |
Post Options
Thanks(0)
|
|
Yuasa identical to what it came with originally so I assume it's a reasonable one. I'll give it the times you mentioned on the charger and see what comes out of it then. Does it need resting time off the charger before i fit it back in the bike?
Edited by Hackney - 25 Jun 2018 at 16:47 |
||
Post Reply | Page <12 |
Tweet
|
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |