ChrisB wrote:Interesting, I'm a little unclear why only two brushes show signs of copper pick up, I wondered if it was because two are used for regen ?? but then as theres only two connections onto the brush ring that rules that one out.
The left & right brushes are connected together and the top and bottom are, two brushes are pos and two neg, all 4 brushes are used for regen and drive.
I think? the left and right brushes must be positive as electrons flow from neg to pos, so you find the positive will get the deposits, as does the pos post on a car gets the most corrosion.
Ill be interested to know what mileage you get from this Set of brushes you've just fitted.