KJ 11 laser dash light {door ajar**

[KW XRT]

Probably sound stupid but the mrs tells me that the laser is running rough which it is so I go and sit in it and it's got a miss every now and then and with misses it is worse in gear {auto** so I throw some plugs at it which worked well for the first drive now it;s back missing also I want to know since the miss has come I have noticed that the door ajar light came on and stayed on.Turned the car off and it went out and came back after restart .It's flicking like alternator hasn't enough charge but reved it and it was still there.Does this warning light indicate anything except the door is ajar.Of course car didn't come with boor.It was built 6/96 and done 171k