Mercedes-Benz Forum - View Single Post - Rear SAM, "input to Circuit 54, short to positive"?
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post #1 of (permalink) Old 05-22-2019, 02:53 PM Thread Starter
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Date registered: Oct 2013
Vehicle: 2005 E320 CDI *black on black with nearly every option*
Location: Lansing Michigan
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Rear SAM, "input to Circuit 54, short to positive"?

I've got a 2008 ML320 CDI I'm troubleshooting here. The brake lights are staying on all the time when the engine is running, no matter what gear I'm in or weather I'm driving or not. The right turn signal was occasionally flickering rapidly as though a bulb was out too, but they are all tested in good working order. And as I got home, the headlights started flashing as if the alarm was triggered (no siren.)

Scanning all the control modules, the only relevant code showing up, is code 909A in the rear SAM, "the input to circuit 54 has short circuit to positive." It is current and stored.

Any idea what could be causing this? I'm fearing a malfunctioning Rear SAM, I see no signs of
obvious water intrusion .
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