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650CS dead

PostPosted: Fri Jun 21, 2013 7:29 pm
by pajacobsen
My 650 CS is dead... I mean dead.

Battery got juice -- charger and outlet plug shows power, voltage drops when key is turned.

Everything else just d-e-a-d. No lights, no noise (including clicking,) no nothing.

Ideas?

Re: 650CS dead

PostPosted: Fri Jun 21, 2013 7:32 pm
by pajacobsen
P.S. All external fuses look good. Also, I see no voltage on the external fuse box....

Re: 650CS dead

PostPosted: Fri Jun 21, 2013 8:33 pm
by Aether
Grounding problem?

Re: 650CS dead

PostPosted: Sat Jun 22, 2013 8:01 am
by Chiba
Battery cable connections?

Re: 650CS dead

PostPosted: Sat Jun 22, 2013 10:47 am
by Georgeinva
pajacobsen wrote:Battery got juice -- charger and outlet plug shows power, voltage drops when key is turned.

From what to what? Sound like a dead battery or poor conection

Re: 650CS dead

PostPosted: Sat Jun 22, 2013 2:46 pm
by Ted
Reminds me of when the battery in my K75 went bad. Would happily charge on the Battery Tender, stuff would light up as normal when the key was turned, hit the starter button and everything would go dead except for the RPM gauge which would slowly climb to 4k then slowly return. I could jump start it but hit the horn and it would immediately die. New battery fixed it.

Too bad battery bug was sued out of business!

Re: 650CS dead

PostPosted: Sun Jun 30, 2013 12:16 pm
by Wild Pig
Try load testing the battery or drop in a known good one and see what happens. It may have enough to show power but not enough to crank over. Low batteries sometimes do funny things to BMWs.