Does anyone know how to properly test the glow plugs in a 2.0 TDI engine?
Don't know what voltage to expect, but was told that a straight 12v across the glow plugs would ruin them. Its a BRD engine by the way, so has ceramic glow plugs.
Also not sure if the coolant temp' sensor affects whether they 'glow' or if thats controlled by something else.
All help VERY welcome!