G35 sedan won't start after 15 hours of sitting

Post by **DiegoBrent** » Tue Mar 17, 2009 1:59 pm

After sitting over night or between 12 - 15 hours the battery is drained without enough juice to start. I have replaced the starter, alternator and battery, but still the problem exists. My mechanic advised me of a motherboard that sits behind the radio and controls the amp/radio/AC...could this be not functioning causing the amp to possibly be continuing to drain the battery?

Post by **tollboothwilley** » Tue Mar 17, 2009 6:40 pm

Yes, if you have replaced the battery you have a parasitic drain somewhere.

Disconnect the stock head unit and let it sit for a day to check.

Post by **Poyzinous** » Wed Mar 18, 2009 2:47 am

Yes the radio circuit board has been known to fail after a few years and cause a parasitic draw. It eats up current while you sleep. It may be an issue... They are expensive though. If it is your problem, e-mail me your VIN and I'll let you know which part number goes on your car and what it costs you...

Post by **DiegoBrent** » Wed Mar 18, 2009 4:49 pm

Thanks man....ya, I have changed the alternator/battery & the starter. My mechanic said that circuit board was about the last possibility. My vin is JNKCV51E33M008501

Brent

G35 sedan won't start after 15 hours of sitting

G35 sedan won't start after 15 hours of sitting

Re: G35 sedan won't start after 15 hours of sitting (DiegoBrent)

Re: G35 sedan won't start after 15 hours of sitting (DiegoBrent)

Re: G35 sedan won't start after 15 hours of sitting (Poyzinous)

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