PeachParts Mercedes-Benz Forum - View Single Post - Inside the box: VDO Cruise Control Actuator

JamesDean · #3 03-31-2012, 01:00 PM

Quote:

Originally Posted by Bio300TDTdriver

Very interesting. So even though the actuator was in spec according to what you and GDL say, it still took out the amp. Have you figured out why?

GDL specifies between 120-180mA of current draw. This unit was slightly above that by about 20mA at the highest. Out of spec a little but nothing huge.

I think I'm going to tear into it further and explore more. There were more specifications on the GDL's website such as various resistances of motor brushes, and potentiometer.

If I had to speculate as to why it caused the failure, either some internal is intermittent and I've not discovered it yet or something caused a huge current or voltage spike and the protection bits in the amplifier we not adequate to prevent damage. Perhaps stuck linkage, and a bad potentiometer trace caused the unit to not 'know' where it was and it tried to move against a physical stop area.

More exploration is required for certain.