For testing just the diode (not activating circuitry et al), a multimeter with diode test mode could be used. Apply red lead to the anode and black to cathode. Meter should display the [approximate, probably a bit lower than nominal due to low test current] forward voltage of the diode, and diode should light up [weakly due to low test current]Hi,
My oil pressure light is not working on my 2.0L Partner.
Is there any way of testing that the led in the dash has failed please?
Thanks in advance