1996 Land Rover Discovery 1. Gems. o2 sensor colour code. Red-- 12v Heater
Yell-- GND
White-- GND Heater
Black--- Signal
If I connect my ohm meter to red and white wire I should have continuity? Its the heater circuit. Ohm meter connected to red wire and yellow wire [ yellow wire is GND ;but not ground for the heater] continuity or not?
Connect volt meter to yellow wire and black wire and heat sensor with a torch it should show a voltage?