Help! No hot signal to alternator - Mercedes-Benz Forum
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post #1 of 2 (permalink) Old 05-22-2019, 11:02 PM Thread Starter
BenzWorld Newbie
Date registered: May 2019
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Help! No hot signal to alternator

My 2009 GL550 died while running battery was completely dead. I charged the battery and turned on the secret volt gauge (hit reset 3 times while on odometer screen and key turned to first position) on the alternator in not charging.

I replaced the alternator and it is still not charging. I checked the single black wire in the connector plug and sure enough no hot signal with key off key on or engine started. Even check for a ground signal and nothing.

Now I am trying to find the alternator fuse or relay but the fuse diagram for all 4 areas under hood, right of dash by the battery and the right rear compartment and nothing is listed for alternator. Surely someone can lead me to the path of the alternator power source.

Appreciate ya!

Please text me at (972) 808-0101 or email me at [email protected] as I am a new member and not sure how to turn on my instant notifications just yet.
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post #2 of 2 (permalink) Old 05-24-2019, 07:44 AM Thread Starter
BenzWorld Newbie
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Sorry correct # is (972) 898-0101
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