Hi i,ve got a 53 plate peugeout boxer 2.0 hdi struggles to start in colder weather eventually will fire but cranks for probably 20- 25 seconds once you start and run it its fine, today i took out the glowplugs and tested them all fine however there is no live feed to the glow plugs chase the wire up to the black box and it has a live feed going to the plug that connects to the box there is a terminal that stays permant live but the glow plug lead won't go live with ignition on or off ( is this normal) what else can i try Many Thanks in advance dan