BenzWorld Junior Member
Date registered: Mar 2011
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New K56 batt cut-off didn't help
Any help with the known K56 battery cut-off relay problem on 98 SLk230 ??
I replaced the batt and alt before realizing they weren't the problem so both test good. After I replaced the battery cut-off relay, nothing changed. The "G" post on the relay has 19+V and the "battery" post has 12.2V (less with the lights or other stuff on).
In other words, the relay is not passing the charge on to the battery even though the alternator is maxed.
Anyone know where the signal comes from that throws the relay off? Could a false crash detection signal from some inertial switch have blown the new relay already? If I just jumper around the relay will the regulator still control the charging level so I dont fry my battery? I don't really care if I'm a tiny bit less safe in the event of a crash, I just want to be able to drive without wonderingwhen my battery will go dead in traffic.