300TDT
Senior Member
- Joined
- Apr 17, 2009
- Messages
- 108
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- Location
- Tintern
- Your Mercedes
- E300 W124 diesel estate 1996, E300 W124 turbodiesel estate 1994, Golf tdi convertible,
My glow plug lamp has been coming on intermittently for a few minutes after start up.
I replaced the glow plugs last year - but thought I'd better check them with winter approaching. I normally do this by putting one probe of an ohmeter (ie a multimeter set to resistance) on the end of each glow plug and the other probe to the car body. In my experience there either is low resistance in which case that plug is OK - or it's open circuit and duff.
It's a difficult job on my car though, the inlet manifold from the turbo makes access very difficult, and then the reading is less than certain.
For the first time it occurred to me that if I pull the electrical plug from the glow plug control unit mounted on the inner wing - which is connected to each of the glow plugs - I could easily test each glow plug by simply probing each pin. The whole job took 5 mins.
Perhaps everyone else is aware of this tip and think I'm daft not to have thought of it before - but it might help someone.
I replaced the glow plugs last year - but thought I'd better check them with winter approaching. I normally do this by putting one probe of an ohmeter (ie a multimeter set to resistance) on the end of each glow plug and the other probe to the car body. In my experience there either is low resistance in which case that plug is OK - or it's open circuit and duff.
It's a difficult job on my car though, the inlet manifold from the turbo makes access very difficult, and then the reading is less than certain.
For the first time it occurred to me that if I pull the electrical plug from the glow plug control unit mounted on the inner wing - which is connected to each of the glow plugs - I could easily test each glow plug by simply probing each pin. The whole job took 5 mins.
Perhaps everyone else is aware of this tip and think I'm daft not to have thought of it before - but it might help someone.