How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Stan Your Own Question
Stan
Stan, Mercedes Technician
Category: Mercedes
Satisfied Customers: 3526
Experience:  Technical support engineer
16766657
Type Your Mercedes Question Here...
Stan is online now

Accidentally shorted out my alternator on my W203 C220 cdi

Resolved Question:

Accidentally shorted out my alternator on my W203 C220 cdi and now I have no power at the alternator so also no charge. Checked all the normal fuses and also the pre fuses near the battery but all ok. Does the power go via the starter? Have power there but that seems to be where it stops. I am lost for anything more to do and really need some guidance before I go nuts.
Submitted: 2 years ago.
Category: Mercedes
Expert:  Stan replied 2 years ago.
Stan :

You are right that main alternator cable is unfused 25 square mm line running to the main starter connection

Stan :

There must be battery voltage at the cable on the alternator side. Measure the voltage against battery ground. If you have voltage at the starter, it means cable from starter to alternator is faulty.

Stan :

regards,
Stan

Customer: Is it possible to replace the cable without removing starter motor as the connection is behind the solenoid. If cable turns out to be ok. Is there something in solenoid that could have burnt out. My starter works fine and have full power to it. Just a residual 2.2 VCD at alternator end.
Stan :

Hi,
I do not see a reason why the alternator cable cannot be removed without removal of starter.
Actually, the cable has a built in fuse. It is not available separately.

Stan and other Mercedes Specialists are ready to help you