Heated Rear Window - 1992 Defender

I seem to recall that the one on our rangie would not work when the bulb had blown.....

Lee D

In article , Gordon writes

Behind the dash.

follow the wiring from the HRW switch.

its behind the dash, right hand side, fastened to the bulkhead. mine packed up also, the black and slate wire is a negative feed into the unit, it comes out of the unit to earth. to fix mine i simply earthed out the black&slate wire before it went into the voltage sensitive switch. Problem solved (for me anyway).

only thing is dont forget to turn it off manually otherwise you'll melt the HRW.

On both my '89 and '91 rangie the connection point to the rear windows was at fault. Pop the rear window and you will find a wire going to each the left and right upper corners. Make sure you have a good earth, turn on the HRW then...Check for voltage at the blade connector, if voltage present then check for voltage at the rear window's solder connection, if voltage is present then the HRW should work, if no voltage then repair the connection points. On both of my autos I had to strip back the insulation and reconnect the wires coming from the headliner to the connectors at the window. I was able to use the original blade connectors. I suspect that over time the thin piece of copper metal breaks within the rubber insulation from the opening and closing of the rear gate. Good Luck.