Glow plug time question.

How long should the glow plug light show for on the 3 lt turbo. Mine shows only for an instant on switch on. The engine starts instantly and runs perfectly. I ask this as my other working 2.4 d shows the light for about 15 seconds . Comments welcome . PS anyone know if the interior light tube is available . Thanks. BC.

The 12 volt neon tube is readily available - try a Camping/Mobile homes outlet.
On my 3L engine - non turbo 2.8ltr ,5-6 secs is the norm for a cold start.
You usually only need the glow plugs for Cold Starts e.g. frost, try checking a 12 volt circuit tester on one of the glow plugs to see what actual time they are heating.
On my 3L engine, there is a temp sensor for the glow plug circuit under the inlet manifold, if it packs up it does not give power to the glow plugs.
Usually with a warm/hot engine this sensor inhibits the glow plug timing to 1 or 2 secs.
According to the manual the Variable Delay Type is 5 secs, the Fixed delay is 15-19.5 secs.
Hope this helps.

Thanks John, It's helpfull being able to compare notes here.

My light only stays on very briefly and runs very well.

Guess it just heats up quickly

Not aware of a sensor as John's ref on the 2.4.
5-6 secs is good but allow slightly more in winter as there is a transistor coil set in the glow plug box. When you start and run the van, you should also hear the box click for a second time and in some cases the RPM increases, this is due to the unit still applying supply to the glow plugs (as I found when testing for why my former van used to have a habbit of doing this, and my intregness to find out why). This time laps is shorter the hotter the motor is.

I don't get any light