Alex Crow
Senior Member
- Joined
- Jul 9, 2009
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- Super Suffolk
- Your Mercedes
- W169, W124, w202, W203, KTM 250 EXC, VW T25 camper and a Polo in a pear tree
they pulse very slowly malcolm. it is not really pulse width modulation at all, in so far as the valve is either open or closed and not held in an intermediate position.
if you connect just a meter all will be revealed - no high speed capture needed. having said that i can't swear the same for eg the 220, but it definately goes for eg 124, 201, 202, 210 etc.
i believe also that they are actually 12v as the unit would struggle to supply the current if it had to invert to 8v (or however it makes the 8v you suggest - pcb level electronics not my bag).
if you connect just a meter all will be revealed - no high speed capture needed. having said that i can't swear the same for eg the 220, but it definately goes for eg 124, 201, 202, 210 etc.
i believe also that they are actually 12v as the unit would struggle to supply the current if it had to invert to 8v (or however it makes the 8v you suggest - pcb level electronics not my bag).