vr6 draining battery when running ? help

[DaveVR6'S' 0]

hi, when i go to start car it just clicks once. when tested battery its on 12v but when u turn on/ try to start it goes to 0v. when i jump start off another vehicle it starts but when running battery counting down from 12v down to 2v. when switch car off battery goes back to 12v.

Any help would be much appreciated.

[legvw 0]

Sounds like your alternator isn't working fella, and your car is running off of the battery. Is the charge light on the dash when you've had it running?

[DaveVR6'S' 0]

iv had a look and all the dash lights are off but the abs light flickers. a local mechanic says it could be ignition switch ? if the alternator is shot would that cause the car not to start ? cheers

[legvw 0]

Yes, because the battery will be flat if the alternator is not charging it. It would cause the 'click' sounds on turning the key to start-as the batt hasn't got enough power to turn the starter.

The battery should show 13 to 14v when the engine is running, if the alternator is charging.

[DaveVR6'S' 0]

iv got a spare 1 so ill put it on later and give that a try. thanks for the help

[DaveVR6'S' 0]

iv tried a new alternator but its still doing the same. is there some kind of ignition relay etc that could be faulty ?

the car worked perfectly till i put my hand down behind the rad. could i have knocked something that could cause it ? iv checked all conectors and plugs and all seem fine ? when i jump start the car it drives fine and idles as normal, but soon as i turn it off it goes back to the fault.

[T0NYVR6 2]

Sounds like a regulator problem to me but I dont know where the it is on these cars. When you bumped the car and it was running what voltage did you have on the battery?

[DaveVR6'S' 0]

its a L reg corrado vr6. when i jumped the car it was on 11.99 volts and the it just counts down slowly to 2 volts. but just makes 1 click when tried to start without jump start. so confusing.

[T0NYVR6 2]

Could do with a wiring diagram for the charge circuit. Your definately not recieving the voltage being generated from your alternator. Are you sure the alternator you put on was good?