Battery warning light - Page 3

Binny · 1st June 2019, 18:22

Quick update.
After giving the battery a twenty four hour charge I set off on my eighty five mile journey back to East Yorkshire. After only thirty seconds the battery warning light went off however it came back on again after about nine miles and stayed on for the rest of the journey which was accomplished without any problem (thanks for the info on battery range Trikey).
As soon as I was home I checked the battery voltage which was about 11volts and having the engine running made no difference. Removing and cleaning the starter and alternator leads made no difference. Also with my multi meter lead connected directly to the main lead stud on the alternator and the engine running no voltage showed so I presume that I have an alternator fault?

sewerman · 1st June 2019, 19:22

Quote:

Originally Posted by Binny

Quick update.
After giving the battery a twenty four hour charge I set off on my eighty five mile journey back to East Yorkshire. After only thirty seconds the battery warning light went off however it came back on again after about nine miles and stayed on for the rest of the journey which was accomplished without any problem (thanks for the info on battery range Trikey).
As soon as I was home I checked the battery voltage which was about 11volts and having the engine running made no difference. Removing and cleaning the starter and alternator leads made no difference. Also with my multi meter lead connected directly to the main lead stud on the alternator and the engine running no voltage showed so I presume that I have an alternator fault?

Sounds like it as I said at that mileage the brushes could well be worn on the regulator

Have a look here https://www.the75andztclub.co.uk/for...sh+replacement for a guide to changing the regulator or just the brushes.

The regulator is available from dmgrs or ebay

Brushes I brought of eBay here https://www.ebay.co.uk/itm/REPLACEME...edirect=mobile as recommended by marinaBrian but you need a decent soldering iron !

Scott

Canonite · 1st June 2019, 19:45

If it’s 11 volts your battery probably won’t ever recharge to its capacity again

Binny · 1st June 2019, 21:27

Thanks for the replies Sewerman and Canonite.
As it happens another twenty four hour charge and the battery was showing just over 14.3 volts so I’m hoping it’s OK.

trikey · 1st June 2019, 21:30

Bear in mind that changing the brush pack does not always repair the issue, sometimes the alternator shaft can be worn so the new brushes are not the answer!

Binny · 27th June 2019, 21:15

Update - new brushes and regulator from DMGRS fitted to the alternator and everything is back to normal on the charging front with my meter showing 14.5 volts at tickover😀
I was only able to diagnose and fix the problem due to the posts on this excellent forum.

sewerman · 28th June 2019, 10:58

Glad you got it sorted

Sent from my SM-G950F using Tapatalk

1st June 2019, 21:30	#25
trikey Premium Trader Rover 75 Join Date: Nov 2010 Location: Devon Posts: 33,777 Thanks: 8,837 Thanked 14,831 Times in 8,030 Posts	Bear in mind that changing the brush pack does not always repair the issue, sometimes the alternator shaft can be worn so the new brushes are not the answer! __________________ Lest we forget..

1st June 2019, 18:22	#21
Binny Newbie 75 tourer Join Date: Dec 2011 Location: Hull Posts: 14 Thanks: 0 Thanked 3 Times in 2 Posts	Quick update. After giving the battery a twenty four hour charge I set off on my eighty five mile journey back to East Yorkshire. After only thirty seconds the battery warning light went off however it came back on again after about nine miles and stayed on for the rest of the journey which was accomplished without any problem (thanks for the info on battery range Trikey). As soon as I was home I checked the battery voltage which was about 11volts and having the engine running made no difference. Removing and cleaning the starter and alternator leads made no difference. Also with my multi meter lead connected directly to the main lead stud on the alternator and the engine running no voltage showed so I presume that I have an alternator fault?

1st June 2019, 19:45	#23
Canonite This is my second home BMW 330d Tourer, MG ZT 180 SE XPG, VW Polo 6R 1.2 TDI Bluemotion Join Date: Jul 2011 Location: York Posts: 6,022 Thanks: 363 Thanked 574 Times in 319 Posts	If it’s 11 volts your battery probably won’t ever recharge to its capacity again

1st June 2019, 21:27	#24
Binny Newbie 75 tourer Join Date: Dec 2011 Location: Hull Posts: 14 Thanks: 0 Thanked 3 Times in 2 Posts	Thanks for the replies Sewerman and Canonite. As it happens another twenty four hour charge and the battery was showing just over 14.3 volts so I’m hoping it’s OK.

27th June 2019, 21:15	#26
Binny Newbie 75 tourer Join Date: Dec 2011 Location: Hull Posts: 14 Thanks: 0 Thanked 3 Times in 2 Posts	Update - new brushes and regulator from DMGRS fitted to the alternator and everything is back to normal on the charging front with my meter showing 14.5 volts at tickover😀 I was only able to diagnose and fix the problem due to the posts on this excellent forum.

28th June 2019, 10:58	#27
sewerman Gets stuck in MG ZT+ CDTi Join Date: Feb 2014 Location: Wolverhampton Posts: 632 Thanks: 166 Thanked 264 Times in 154 Posts	Glad you got it sorted Sent from my SM-G950F using Tapatalk