SL/R230: Can anyone explain this? I'm just guessing it's a short somewhere.
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Joined: Feb 2023
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05 SL500
Can anyone explain this? I'm just guessing it's a short somewhere.
Battery ground to right post of bcm.
Battery ground to body of bcm.
Battery ground to lefr post of bcm.
Battery ground to positive terminal of battery.
The negative battery cable is disconnected during these checks.
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From: Gretna, NE
'03 SL55 Black, '03 SL500's Aegean, Mars Red, Tazanite, Alabaster, '11 S550 Flint Gray
The bottom two are rear battery voltage, top two have no reference and are meaningless. Install negative cable and retest. Also, positive battery cable should be replaced with a proper cable.
Thread Starter
Junior Member
Joined: Feb 2023
Posts: 36
Likes: 1
05 SL500
Noted, and thank you. I will take care of that today. I actually got the batteries both charging this morning. While having the bcm up on the diagnostic screen monitoring voltage. It was doing well other than an occasional blink, (1 sec) then back to normal. Then I took it for a test run, and the voltage bottomed out. Got home to restart and it went into emergency mode but it started. Sitting on low voltage at the moment.
