C240 Rear SAM Problem - MBWorld.org Forums

Sep 30, 2024 | 08:38 PM

NAFT1

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Joined: Nov 2014

Posts: 181

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From: Dallas, TX

1999 E55 AMG, 2004 Big Turbo A4; 2005 C240 Wagon 4matic; 2003 G500; 2013 Sprinter 172

C240 Rear SAM Problem

Please disregard; I meant to post in 203 section.

After replacing a very dead battery my rear hatch lock cycled continuously, and the rear lights were all on for about 30 seconds as soon as I reconnected the terminal. By the time I got back around to the front of the car it stopped and now no remote locking; car cranks but does not start; display error message on cluster, fuel gauge doesn't work. Obviously a rear SAM issue but, before I send it off, I wanted to try a couple of things that I can't find an answer for.

Is there a fuse or fusible link between the battery positive terminal block and the SAM positive cable harness?

I pulled the rear SAM; if I reconnect the battery and check for 12V with my multimeter between the SAM positive cable and chassis ground, will that possibly fry anything else? I haven't checked continuity on that cable yet as I'm still not clear on which of the 5 cables on the battery terminal block runs back to the rear SAM. Does anyone know?

Any other advice from your experiences?

Thanks

Last edited by NAFT1; Sep 30, 2024 at 08:49 PM. Reason: Wrong section

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