So the ' blade terminal' in the Relay gives voltage on only 3 of the 4 blades?
I only get a fiew V, on all 4 plugs,2-4V I think it is the relay, taht i shot, have messured directley on the pins to the wireing til the plugs.If you are getting voltage at the other heater plugs when testing the same way I would test the wiring to that plug.
As a basic test of a heater plug in situ, I use a multimeter on Ohms setting between the top of the heater plug with lead disconnected and earth on the engine for continuity.
However if no voltage at terminal, then test wiring.
No, 2-4V on all 4, have a plug that is FUBAR, messures 8 ohms.
The exact ohm could be wrong, but fits that mec shows error code at that glow plug.Does sound like the relay if only under 4 volts. Not sure about the 8 Ohms as an exact reading, I have generally found if I have continuity through a heater plug then they usually work.
I see the Fiat ones are marked 11volts so hopefully safe to test at battery voltage for a few seconds to see if heat up.
Many years ago I tested a set of Bedford Midi van heater plugs like that without inspecting them closely, they all worked once and died, entirely my fault so I replaced them at my expense, it turned out they used 5 volt ones,. Duh!
Never tested a Fiat one, perhaps someone else on Forum can advise.
Witch fuse is for the glow plugs?Never tested a Fiat one, perhaps someone else on Forum can advise.
