Battery problem!

[swiftymcfeat]

Weird problem but here goes!!

Ive just completed the engine swap in my VN, but im experiencing a weird drain on my battery now? This is how it is...

When i have the battery connected, i can here a slight hissing noise coming from the engine (hence the draining of the battery) but it stops as soon as i disconnect the battery...

ANY idea of what this may be? Its annoying me jumping it to get to and from work...

Thanks!

[v6lux]

You will need to disconnect all plugs, 1 at a time to isolate the exact thing causing the hissing noise. Then tell us what it is and get back to us.

[swiftymcfeat]

ahhh damnit. I dont have the time this week haha