Good work. How are you wiringvthe LEDs? To monitor if power is being passed by the devices properly?
--R Sent from iPhone > On Oct 28, 2017, at 9:19 PM, Jim Cathey via Mercedes <mercedes@okiebenz.com> > wrote: > > The heat control has been flaky for some time, and as things cool down > it's getting more critical. Just the lightest touch on the control > wheel would make it cut in and out. (The monovalve LED I added some > time ago is really crucial for this kind of diagnostic.) Today I > finally made some time and removed the ACC panel. I removed the > potentiometer from the PCB and opened it up. It's custom, no way to > come up with a replacement, except out of another unit. I cleaned it > out, and used DeOxIt fader spray on it, and did a very light > wire-brushing of the circular tracks and the sliding metal fingers. > According to my meter, the resistance change is smooth, with no > intermittency. We'll see if this works any better. While I was there > I added another LED, this one for showing AC energization, behind the > center button. I used the other LED from the same toy, but used the > blue side for this function. I used another 680 ohm resistor from the > junk box, and hooked the series combination between the X1-7 (Klima) > pin and power. Also, one of the two illumination lamps was > intermittent, so I replaced it with a new one. All this took a little > over two hours. On the test drive today it behaved well, but as it > was a warm day nothing much was proven. The next cold morning drive > should be more definitive. > > -- Jim > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
