Hi guys,
Look what I found in Germany
:
http://www.omega-freak.de/forum/1706-regensensor.html?highlight=regen+sensor(Google translation from German. Disc=windscreen, etc.) It looks like it is not that hard.
"So, I got my rain sensor installed and it works perfectly! For those who also want to retrofit a small tutorial here ne time with the built parts of me:
first time do the old windscreen out ...
http://www.opelcars.de/forum/regensensor/DSC00332.jpg... and a new one with rain sensor mount purely - windscreen heat resistant (SolarRelex) with rain sensor mount
http://www.opelcars.de/forum/regensensor/DSC00333.jpg- rain sensor for heat-resistant windshield part number: 93,171,184 Catalogue number: 6238211 = 151.72 EUR..
http://www.opelcars.de/forum/regensensor/DSC03285.jpghttp://www.opelcars.de/forum/regensensor/DSC03286.jpg- 2 relay Part No:. 90,543,014 Catalogue No:. 6238564 = 26.18 EUR
http://www.opelcars.de/forum/regensensor/DSC03287.jpg- wiring harness (homemade) = 0.00 EUR -
http://www.opelcars.de/forum/regensensor/DSC03288.jpg- cover for the rain sensor and the mirror mount Part No: 93,172,242 Catalogue number: 6428872 = 5.65 EUR..
http://www.opelcars.de/forum/regensensor/DSC03282.jpghttp://www.opelcars.de/forum/regensensor/DSC03283.jpgCurrent (+ PIN 1 and neutral PIN 4 of the sensor) I've taken from the interior lights and pulled out all the other cable to the A-pillar on the driver's side down to the fuse box. There, then after switching to plan for rain sensor
http://www.opelcars.de/forum/regensensor/mit_Regensensor.pdf (here the diagram without rain sensor for comparison
http://www.opelcars.de/forum/regensensor/ohne_Regensensor.pdf) and then connected the relays and with power thieves the cable from the wiper switch tapped. In the engine compartment from the relay box nor the interval relay (a rather large yellow part) pulled out. And then to test spray water on it. If everything works you have it connected properly and you can grow the panels. So, that's it. If not then ask her that. MFG"
http://www.youtube.com/watch?v=RgLBHVdnH6A&feature=player_embedded Looks that 2 relays are needed also. I don't speak German so I don't know whether the retrofit was done on a car with wiper speed wheel or not.