I have successfully replaced my 250TD Glow-plug relay, but would like
to
see if I can fix the old one.
My Haynes manual doesn’t seem to include it in wiring diagrams.
There’s 1 brass connector for main supply.
5 large pins (G1 - G5)which feed each plug,
But can anybody identify the other smaller 5 pins labelled T, 31, 50,
LA, and 15 ?

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two is for relay trigger... one is ground and other one is diagnostic light.

Thanks Tiger.

"Tiger" wrote:
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In the Mercedes wiring diagram, 31 means ground, 30 is hot all the time
(directly connected to battery positive), 15 is hot at run and start. I
don't know the others. Have to look at the diagram to tell.

TimWoods wrote: