Glow plugs td2.5 are they always live ?

I'm trying to figure why I can't get a live feed for the glow plugs on a TD2.5 19j engine. Fitted new ignition switch . Getting power to all connections white, brown orange (radio) white /red to stater solenoid black /white fuel cutoff but the remaining contact which should be glow plugs isn't coming Live at posn 1 (pre start) . What stops the glow plugs being live after the engine starts ? There is no relay /timer on the vehicle so when engine fires posn 2 and key returns to post 1 as far as I can see from Haynes manual circuit diagram, the glow plugs will still be live or am I missing something obvious ?

I have the 19j non turbo. There are three key positions IIRC: second which turns the glow plugs on - no timer relay, just count to 20, then third which turns the starter. The key then flicks back to post one.

Second position makes them live.

So if position 2 switches the glow plugs on , how do they go off ? Since after starting the key returns to position 2 ? Would seem that they will be on permanently .

0 - off
1 - on
2 - start incl glow plugs.

Mine is:

1. off
2. ignition on
2.5 glows on
3 start

The 2.5 position, I have to hold the key against a strong spring for as long as I want the glows to be on, the glow light comes on in this position. When the key is released from position 3, it returns to position 2.

sp00k said:

Mine is:

1. off
2. ignition on
2.5 glows on
3 start

The 2.5 position, I have to hold the key against a strong spring for as long as I want the glows to be on, the glow light comes on in this position. When the key is released from position 3, it returns to position 2.

Click to expand...

+1 that's how mine is, or was should I say.

Sorry, that's correct - I had to go and check!

sp00k said:

Mine is:

1. off
2. ignition on
2.5 glows on
3 start

The 2.5 position, I have to hold the key against a strong spring for as long as I want the glows to be on, the glow light comes on in this position. When the key is released from position 3, it returns to position 2.

Click to expand...

What he said.

OK ,thanks , that's sounds more like it. Having taken the old switch apart it does have 4 positions for contacts to make/break . Still need to follow wiring and see why it's not connecting :tea