electrics going crazy help please !

[adam_vaux]

Vectra 1.8 ls 2003

Went to start my car today and when I turned the key nothing happened apart from all lights flaahing stereo started blasting out and the alarm was going away ! Took the key out could lock the car using key fob so had to lock manual . Walked away from the.car with the stereo and alarm still going off . Tryed jump starting it off my other car started fine , drrove a few miles down the road and all the lights were flashing again , lost power steering and car died then all electrics started goina mad again had to disconnect the battery to get some sleep !! Lol . Can anyone lead me in the right direction please ? Is it the.battery , alternator ??

[Handyandy-UK]

If you have access to a multimeter you need to check the battery voltage (engine off) and then at idle and with some revs (around 2000rpm should do). You're looking for about 12v engine off and around 14v running - slightly higher just after starting, but settling to around 13.5v.

If you don't have access to a meter, most battery places will do a check for you - some even free.

Once you can eliminate battery and alternator faults, you can better hunt down anoy other possible problem(s).

[DAVIDD88]

It's the alternator mate

[byebyeitsagsi]

As above alternator.

[Critch]

If you don't have a multimeter get yourself to local Halfords they'll perform a check and give you a print out

[adam_vaux]

Looks like it was the alternator will try get one orded thanks lads !

[SlowCoach]

I had that happen. Turned out starter motor packed in. Alternator charges battery when engine running, starter motor plays a role with alternator as well. Take alternator and starter motor to reconditioning electrical place to be tested. Free!