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I burn the alternator fuse. Its reading 12 volts. C230

Customer Question
I burn the alternator...

I burn the alternator fuse.

Mechanic's Assistant: Will the battery hold a charge? Do you know the fuse number?

Yes its reading 12 volts

Mechanic's Assistant: What is the model of your '12 Mercedes?

C230 kompressor 2005

Mechanic's Assistant: Are you fixing your C230 Kompressor yourself? What have you tried so far?

Yes i am

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

I made a rookie mistake b4 i took of the old alternator i got a spark when taking of battery cable

Submitted: 8 months ago.Category: Mercedes
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Answered in 3 minutes by:
11/12/2017
Mercedes Mechanic: Mike, Auto Mechanic replied 8 months ago
Mike
Mike, Auto Mechanic
Category: Mercedes
Satisfied Customers: 497
Experience: Lead Tech at Solis Auto Repair
Verified

Hello, my name is***** will be helping you out! I have over thirteen year of experience in the automotive industry for numerous different makes & models. I enjoy doing what I do, it is my life.

It will likely NOT hold charge, if we need to determine if it will hold charge is simply by putting a voltmeter to the battery positive and battery negative or find power and ground on the vehicle and monitor the voltage reading, it should indicate around 13-14 volts. If it shows 12 volts, it will not hold a charge.

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Mercedes Mechanic: Mike, Auto Mechanic replied 8 months ago

This obviously has to be done when it is running.

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Customer reply replied 8 months ago
the batter is reading 12 volts. but when i turn on the car and remove the battery cable the car will turn of........I made a rookie mistake. When removing my old alternator I forgot to unplug the battery and I got a spark.
Mercedes Mechanic: Mike, Auto Mechanic replied 8 months ago

ok let me look up location now, one moment.

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Customer reply replied 8 months ago
i can't find any alternator fuse......anywhere
Mercedes Mechanic: Mike, Auto Mechanic replied 8 months ago

It shows there is one, but im blocked from the actual image of it, and just gives me a description that it states it is in the wiring harness.

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Mercedes Mechanic: Mike, Auto Mechanic replied 8 months ago

Shows to be a 175Amp fuse. I think it will be better to opt out and see if there is another expert with the exact location. At your request, I will open this question back up, let me know :).

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Customer reply replied 8 months ago
please i belive i burn it. but I don't know where to locate
Mercedes Mechanic: Mike, Auto Mechanic replied 8 months ago

No problem :), please do not reply back until another expert responds, that way it will not lock back to me.

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Mercedes Mechanic: Matt, Engineer replied 8 months ago
Matt
Matt, Engineer
Category: Mercedes
Satisfied Customers: 23,314
Experience: Mechanical Engineer with 23 years experience in the auto industry, 8 yrs in formula 1 engine testing
Verified

Hello

another expert here

the alternator fuse is a cable assembly that is part of the negative battery cable and connects to the starter.

The fuse runs at the back of the engine, above the transmission bell housing. The part is about $200 and should take about an hour and a half to replace.

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Customer reply replied 8 months ago
X4/10. Refers to a fuse inside the passenger side under the carpet.
Mercedes Mechanic: Matt, Engineer replied 8 months ago

My information shows it to be in the engine bay? can you check?

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Customer reply replied 8 months ago
Do you have a picture of where I checked everywhere couldn't find it
Mercedes Mechanic: Matt, Engineer replied 8 months ago

hello

Sorry but I don't have an image

however if you follow the battery cable from the negative post down to the engine starter checking for junction boxes and lumps in the cable as you go

as its built into the cable

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