Let down by over 75 - Page 5

Chezza · 27th January 2013, 16:56

Ok so i should start by checking the battery? What should the battery voltage read? can't use a hydometer test as it's a sealed battery. What should the battery read when the engine is running?

chrissyboy · 27th January 2013, 17:18

Quote:

Originally Posted by Chezza

Ok so i should start by checking the battery? What should the battery voltage read? can't use a hydometer test as it's a sealed battery. What should the battery read when the engine is running?

this is where people go wrong ,by the battery show 12v with engine off and 14v with the engine only confirms the alternator is charging ,this test will not show if a battery is taking a charge. a battery supplier can test the health of your battery . if a cell in the battery is dead then it wont hold the charge or wont be able to hold it for long .

Chezza · 28th January 2013, 13:15

So my battery is showing 12.78 after being stood overnight,after the sat nav unit in the boot has done its cycle when you open the car. Battery's which show just over 12v are deffo dodgy in my opinion. so time will tell since the over heater is disconnected weather or not my 1 year old battery is U.S.

gerry3 · 28th January 2013, 14:22

In your calculations on how much is drawn from the battery do not forget that you need to include the starter motor amps.
Short runs will not replace the current used and can slowly discharge the battery.

bl52krz · 28th January 2013, 14:29

I think i remember seeing on the plate on the side of mine 40 amp.

27th January 2013, 16:56	#41
Chezza Avid contributor 75 cdti se tourer Join Date: Sep 2011 Location: sheffield Posts: 137 Thanks: 0 Thanked 1 Time in 1 Post	Over 75 Ok so i should start by checking the battery? What should the battery voltage read? can't use a hydometer test as it's a sealed battery. What should the battery read when the engine is running?

28th January 2013, 13:15	#43
Chezza Avid contributor 75 cdti se tourer Join Date: Sep 2011 Location: sheffield Posts: 137 Thanks: 0 Thanked 1 Time in 1 Post	Over 75 So my battery is showing 12.78 after being stood overnight,after the sat nav unit in the boot has done its cycle when you open the car. Battery's which show just over 12v are deffo dodgy in my opinion. so time will tell since the over heater is disconnected weather or not my 1 year old battery is U.S.

28th January 2013, 14:29	#45
bl52krz This is my second home Rover 75 cdt club + Rover 2.5 KV6 Conni SE Join Date: May 2008 Location: Birmingham Posts: 11,397 Thanks: 6,587 Thanked 2,262 Times in 1,729 Posts	I think i remember seeing on the plate on the side of mine 40 amp. __________________ Great Barr, Birmingham.

28th January 2013, 14:22	#44
gerry3 Passed Away rover 75 saloon Join Date: Feb 2008 Location: leeds Posts: 186 Thanks: 0 Thanked 0 Times in 0 Posts	In your calculations on how much is drawn from the battery do not forget that you need to include the starter motor amps. Short runs will not replace the current used and can slowly discharge the battery.