Peugeot 306 Glow plugs - nutman
Help.
I've just put a replacement engine in my wifes 306 1.9 diesel, I am fairly sure that I replaced all the electrics correctly.
However there is now no power to the glow plugs and the warning light doesn't come on even tho I can here the control unit clicking on. The glow plugs them selves are fine, I tested them with a direct feed.
Also the battery light comes on at the first click of the key.

What have I done
Peugeot 306 Glow plugs - solara
Does the starter crank? Does the STOP light come on?
What year is the old/new engine?
If the starter isnt cranking and the STOP light comes on, then it is likely to be the immobiliser. I believe in later engines the stop solenoid had a security chip tied in with the immobiliser. ie engine swaps required this to be bypassed.
If all is well there, then its time to get out the voltmeter and trace the faulty source. Sounds like a faulty glow plug timer unit. Check all connections are firmly back in place. Also check all your earth connections, very easy to forget a strap.
Peugeot 306 Glow plugs - David Horn
On French cars it's normal for the battery light to come on - it's to warn you that the electrics are switched on and you're draining the battery.
Peugeot 306 Glow plugs - madf
there may be an immobiliser fitted to the fuel pump.

madf