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#1
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1998 E430 Charging issue
Hello all!! I have a E430 thats not charging properly. I believe the cause to be not enough voltage on the small wire leading to the alternator. If you rev the car up it charges fine but as soon as the rpm drops below 2000 it stops charging. Ive already replaced the alternator twice and it still does the same thing. I checked a 1997 E420 and it has 12 volts on the small wire. The E430 only has 6 volts. Does anyone know whats responsible for the voltage on that wire. Im thinking maybe the ignition switch but I dont have a wiring diagram to troubleshoot from. If anyone has any ideas I am all ears. Thanks for the help in advance.
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DRIVE HARD-DRIVE FAST-DRIVE TO GET THE HELL OUT OF MY WAY. 1986 190E 2.3-16 Pearl Black!! 1987 190E 2.3-16 Smoke Silver!! 1986 190E 2.5-16 Pearl Black!! 2004 CLK 500 Cabrio Designo package!! 1994 E320 Cabrio Red with black top!! 1985 500 SEL Anthracite Grey !! 2011 Subaru Impreza STI 380HP (Yeah Baby) |
#2
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If you remove the small blue wire at the alternator (circuit 61),
and measure the voltage with the key on engine off, 12V. That signal comes from cluster.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator |
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