cranking problem

2006 HOLDEN ASTRA
123,500 MILES • 4 CYL • FWD • AUTOMATIC
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MICK1212
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The battery reads 12.2 average and drops to 11.8 on cranking. When you apply a booster pack away she goes. Could cranking amps from the battery or a crook relay be the drama? Cheers, Mick
Apr 24, 2011 at 4:09 AM
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RASMATAZ
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A good battery reads 12.8 volts, your's is on the low side-have it load tested won't hold 9.6 volts in 10secs its no good-also load test the starter motor-

Here are guides to help

https://www.2carpros.com/articles/starter-not-working-repair


and

https://www.2carpros.com/articles/car-battery-load-test

Please run down these guides and report back.
Apr 24, 2011 at 7:00 AM
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OIDAVEY
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Thank you for this post I had this problem and had to get a new battery cost me $132.00 I love this site.
Oct 2, 2019 at 10:15 AM
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2CP-ARCHIVES
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Hi i have a 2006 holden astra auto and it wont turn over all eltrics work fine lights air con dc player radio windows everything but the car wont turn over was running fine PLEASE HELP

Thanks
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Oct 2, 2019 at 10:15 AM (Merged)
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KHLOW2008
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A weak/bad battery can have suficient power for most of the electrical components except for the starter.
Do you hear any clicking noise from the starter when trying to start?
Have you tried a jump start?
Is the security light (if equipped ) in dash blinking while you are trying to crank engine?
Oct 2, 2019 at 10:15 AM (Merged)
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RIVERMIKERAT
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Have you checked the fuses and/or relays to the starter solenoid?
Oct 2, 2019 at 10:15 AM (Merged)