The 75 and ZT Owners Club Forums - View Single Post

racing green rover · 9th May 2019, 15:59

Hi whilst I'm still waiting for an oil cooler my battery seems to be going flat regulary the alternator is charging at 14.5 volt and with the heated rear window on drops to 13.8 but rises back to 14.5 volt when I rev it, the battery is only 2 month old and that was reading 12.5 volt when I removed the negative lead over night to see if it had dropped although today it was at 12.2 volt. I have tested the amperage by putting a meter between negative lead and negative post of the battery and it reads 0.25 of an amp although I got it down to 0.17 after holding leads tighter on battery lead and terminal is this an acceptable reading or too high.
Thanks

9th May 2019, 15:59	#1
racing green rover Avid contributor MG ZT Join Date: Sep 2014 Location: Westhoughton Bolton Posts: 233 Thanks: 153 Thanked 16 Times in 14 Posts	Battery parasitic drain Hi whilst I'm still waiting for an oil cooler my battery seems to be going flat regulary the alternator is charging at 14.5 volt and with the heated rear window on drops to 13.8 but rises back to 14.5 volt when I rev it, the battery is only 2 month old and that was reading 12.5 volt when I removed the negative lead over night to see if it had dropped although today it was at 12.2 volt. I have tested the amperage by putting a meter between negative lead and negative post of the battery and it reads 0.25 of an amp although I got it down to 0.17 after holding leads tighter on battery lead and terminal is this an acceptable reading or too high. Thanks