Slowly working my way through a few electrical problems on the car. Blown fuses .... now fixed and found to be the door mirror wiring.
Next is Hevac LCD panel which is dead and then my DAB aerial showing a fault on my (Kenwood) radio.
The Hevac unit: Checked the bulbs. Centre one had blown so fitted another one. Put 12v on one of the other bulb holders and they all light up except the middle one behind the panel. Had a horrible thought later about polarity so I hope I haven't damaged anything.
Decided to do the mod to the panel connector while I was at it. Marty, who is away at the moment, kindly posted one on the way to the airport. Thanks Marty. I followed instructions and took it all apart on the bench, cleaned everything and put it back together. Back in the car, I used Faultmate to test the unit. Everthing checks out, controls, switches etc. Everthing works, however the display panel still won't light up. I shone a torch through the bulb holder and the panel is working. The display is really clear and much better than it was. No loss of pixels.
Problem is the bulb, which I tested as ok, does not light up when in the holder. Any ideas where to look? I have got a box of new bulbs on the way.
I tested the bulb holder contacts in the car to see if there was power on it and there doesn't appear to be. Could this be a component fault?
If I can't solve it I was thinking of soldering a couple of thin wires to another bulb holder and fitting an LED behind it.