hi guys, when i've been driving round for a bit off boost, normally when warming the car up i seem to lose some electrical power. the dash lights will dim and the radio start crackling and then cut out, but as soon as i put my foot down a bit and build some positive boost everything seems to come back to normal. i had the battery replaced a few months back and theres no problems with the starting/running of the car. i'm thinking alternator probs; that its not working 100% and cant cope at low engine speeds??? an ideas???