Strange noise under front wing

[shanra]

I have an intermittent noise coming from under the drivers side front wing it sounds like an arc welder, it's electrical because it stops when the Battery is disconnected. What's under there that could cause this? I have the Battery disconnected as a safety precaution. I had my A/C guy fixing a leak and recharging when it first began but I think that may be a coincidence. Thanks in advance.

[Tinonline]

Alternater is on that side nearish to the wing...I suppose that might crackle away?

[shanra]

Thanks Simon but it is definitely under the front wing. I will take the wheel off and splash guards and have a look tomorrow evening. I have to drive to London the next day so the sooner I can sort it out the better.

[shanra]

It does it when sat still without a key in the ignition and when running.

[shanra]

I took it apart tonight and it was the alarm klaxon that was making the noise. I fiddled with the connection and sprayed Deoxit D5 on the connectors and it has stopped I hope!