Not joined yet? Register for free and enjoy features such as alerts, private messaging and viewing latest posts and topics.

Z4 M battery problem

"M" Specific discussion
Post Reply
tmoretta
Newbie
Newbie
Posts: 4
Joined: Sat Mar 04, 2023 12:59 am

Z4 M battery problem

Post by tmoretta » Sat Mar 04, 2023 1:13 am

I own a really nice 2007 Z4 M coupe in Connecticut (only 41K miles) . I have had no issues with it in over 2 years, except that my Battery Tender never turns all green, and the battery slowly discharges during winter storage. I am attempting to run a parasitic drain test on the electrical system with an ohmmeter. I cannot find a way to insure that the passenger side door light switch is disabled. Where is the door switch? Also, any suggestions as to the most likely cause of the drain. The battery is less than 3 years old, and quickly re-charges with a 12 volt charger.

tmoretta
Newbie
Newbie
Posts: 4
Joined: Sat Mar 04, 2023 12:59 am

Z4 M battery problem

Post by tmoretta » Wed Mar 29, 2023 3:19 pm

I found the problem - faulty Battery Tender.

User avatar
inkey$
Lifer
Lifer
Posts: 10475
Joined: Sun Mar 21, 2010 9:48 pm
Location: Sevenoaks & Suffolk
Contact:

Z4 M battery problem

Post by inkey$ » Wed Mar 29, 2023 5:45 pm

tmoretta wrote: Wed Mar 29, 2023 3:19 pm I found the problem - faulty Battery Tender.
:lol: :thumbsup: result!
Current: Project Audi A2 1.4SE
Previously: Z3R 2.8 • E46 330i • Z4R 3.0 • Z4///MC • E90 335i • Z4///MR • Z3///MC 'Breadvan' • Z3R 2.8 • E30 325i R • Z4C • Z4R 3.0

Post Reply