NevSpit Posted March 19, 2017 Report Share Posted March 19, 2017 Hi all. Finally got around to investigating why my windscreen wipers only worked on high speed and did not self park. I have dismantled the motor and when I removed the brush plate the springs / wires on the brushes were rather corroded, so much so that one of the opposing pair just disintegrated. After some searching on the web I found that this is the slow speed brush so that would make sense why it wasn't working! I hope to go to the NEC at the end of the month so a replacement will be on the shopping list. However, I was then trying to work out how the two different speeds work and my brain is failing to grasp it. It appears that the high speed brush is a different shape but still touches the commutator in the same place although it is at a different angle i.e. not opposite the remaining brush. So how do the two speeds work then? Can anyone enlighten me? Thanks, Paul. Link to comment Share on other sites More sharing options...
Pete Lewis Posted March 20, 2017 Report Share Posted March 20, 2017 just like that !!!! dont know if these will have parts for your motor but have a fair selection of repair parts http://www.s-v-c.co.uk/category/wiper-systems-and-parts/ Link to comment Share on other sites More sharing options...
steveweblin Posted March 20, 2017 Report Share Posted March 20, 2017 Triumph used Lucas 2 speed wiper motors. To get the change in speed the switching circuit includes an electrical resistor. Switching the resistor out of the circuit means a higher current can run the motor faster. Here is a circuit diagram borrowed from a Danish Triumph enthusiast: http://www.thorden.dk/ Link to comment Share on other sites More sharing options...
GFL Posted March 20, 2017 Report Share Posted March 20, 2017 I believe the later motors are different, here's another Diagram from the internet? 1 Link to comment Share on other sites More sharing options...
NevSpit Posted April 6, 2017 Author Report Share Posted April 6, 2017 Thanks all, my motor is wired as per Gary's diagram. I took the time to dismantle everything and give it a good clean including the parking switch (it certainly needed it) and picked up a new brush set from SVC at the NEC show. Taking some inspiration from Bordfunker I also rubbed down the bulkhead around the motor and resprayed it. End result is that I now have the luxury of two speeds and self parking - wahhey! It appears that the two speeds on these models are just down to the positioning of the brushes. 1 Link to comment Share on other sites More sharing options...
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