Hi Guys: Does anyone know if the two rheostats on the side of the instrument pod are the same part number? This is relating to an "M" series, Euro model, left hand drive. One rheostat controls instrument lighting brightness and the other conrols wiper speed. I ask the question because one of mine is broken and I am looking for a replacement but my none of my parts books list a part number for the rheostats. I do see that the bodyparts book for "E" series 246GTs lists a part number 0201662 for the instrument lighting brightness rheostat but nothing for the wiper speed rheostat.
this may help...... https://www.ferrarichat.com/forum/threads/dino-saga-060402___instrument-lights-dimmer.100210/
The dino compendium lists both Wiper motor and instrument lights as CEAM 22/7 rheostats so could be the same but i would guess the wiper rheostat is rated much higher or the instrument lights work on the heavy duty WM rheostat essentially using the same part? I guess you need to check both very carefully
Hi Guys: Thanks for your advisements. I have 2 rheostats now. Although there is not the 22/7 part number on them they look very similar to all the photos I have seen. I found a second one in my parts boxes which is the same as the one I have on my test stand. I have my entire wiring harness and engine laid out on a test stand so I can test the electrical system without being in the car so this is how I will test and verify that both these rheostats work correctly in the two circuits...if there is a problem I will reply to this post. Thanks.
Just a heads up that the rheostats are a terrible design and do not work very well. Difference in wiper speed is marginal and on full bright the instruments are still much too dim. It is better to bypass them and leave them in just for show.
Hi Guys: I was looking closer at my Scaglietti bodyparts book and I finally found the part numbers for the rheostats. The windshield wiper rheostat is 22/7 and the instrument light rheostat is 22/6. The image of them in the book looks the same. So there must be something different about them electrically. This is in conflict with the Dino Compendium book which has them both as 22/7. I guess when I start testing my electrical circuits I will have to see how my rheostats work and I may have to analyze the circuits to see what the rheostats resistance values should be.
