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Old 08-21-2012, 09:28 PM
Benchracer Tribe
Join Date: Apr 2007
Posts: 107
R170 SLK supercharger resistance/voltage/current?

Ok, I want to do a bench test for the supercharger clutch. First of all, I measured the resistance across the two pins and got 3.6 Ohm. Is it me or that is way too low?

Second, I applied 12V (connected to my battery) and no click.

Your TACH may have a loose connection...I was wondering why your mechanic would be dead one minute then flopping around the next... PanzerSD

i am inspired. i will replace my windsheild... with an intercooler. swedishK
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Old 08-22-2012, 09:29 AM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
With an ammeter connected the clutch should draw between 2.5-4.5 A

Are you getting a code for the clutch?
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Old 08-22-2012, 05:02 PM
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Location: TX
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3.5 ohms circuit at 14V is 4 amps - which sounds correct as the doc..
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