ford mondeo problem

[zetajones]

I recently had the engine replaced in my 1.8 mondeo zetec lx due to the bottom end blowing on the old one. The day after i got it back from the garage i put the headlights on like usual and the car started juddering and then the engine cut out, it keeps doing this every time you put the headlights on. I had it back to the garage to get it checked out but they say it is nothing to do with the work they have done and dont have a clue what the problem is, although this was not happening before they replaced the engine. Do you think this is a problem with the new engine or could it be something else, and if so do you have any idea why this is happening.

[harley_Husky]

Electrical issue.

Does the car do this with any other type of device active - ie if you switch the rear screen demister etc, or is it only the lights that do this ?

Report back pls

Regards.
Eddie