Weak battery, possibly.

[Omegadoha, Desert Member]

What are the signs of a weak battery?

On mine when I turn the ignition the needles move down slightly and then back up. Is this a sign that the battery might be going?

Ta  

[nick v6]

any local garage can do a battery and alternatot test and normaly free of charge

[philhoward]

Has it always done it, or has it only just started doing it..or have you only just noticed it?!

Cars with electronic dash's usually do a self test on power up - some go to max rpm and speed (which looks funky..).

Voltage check is a good starting point - with everything off, you're looking for about 12.6-12.8V (fully charged) from memory - someone else will pipe up with the proper values!

[Ian_D]

Has it always done it, or has it only just started doing it..or have you only just noticed it?!

Cars with electronic dash's usually do a self test on power up - some go to max rpm and speed (which looks funky..).

Voltage check is a good starting point - with everything off, you're looking for about 12.6-12.8V (fully charged) from memory - someone else will pipe up with the proper values!

Its normal for the dash on omegas to jump when you put the ignition on!

Yes, a good batt will be above 12.6.

Mines at 11.9 at the moment due to me attempting to fit a car pc inside it :-/ Its on charge (going to leave it for an hr) and hope she starts in the morning!