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I'm having a issues with my secondary air injection. It

Customer Question
I'm having a issues...

I'm having a issues with my secondary air injection. It works but the relay was replace. The check engine light came back in. The negative in the fuse box isn't working correctly on the fuse like it's defective. I'm trying to find a wiring diagram but cant

Mechanic's Assistant: Does the light stay on, or does it blink?

It stays on

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

08 ml350

Mechanic's Assistant: Are you fixing your ML350 yourself? What have you tried so far?

My mechanic

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

The secondary air injection. Does work when we bypass the power with ground. It turns on. We replace. The relay. So that's new. Only thing we pinned was the negative inside the fuse box. Isn't working

Submitted: 8 months ago.Category: Mercedes
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Answered in 32 minutes by:
12/6/2017
Mercedes Mechanic: Marty, Mercedes Technician replied 8 months ago
Marty
Marty, Mercedes Technician
Category: Mercedes
Satisfied Customers: 55,290
Experience: Bosch Certified Master Tech. Over 35 years experience.
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Hi, my name is***** you please post all of the fault codes?

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MB Paul

MB Paul

Mercedes Technician

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Qualified Mercedes Benz Diagnostic Technician - 20+ years experience - Workshop Foreman for Mercedes

Marty

Marty

Mercedes Technician

55,290 satisfied customers

Bosch Certified Master Tech. Over 35 years experience.

Lou P. master tech

Lou P. master tech

Mercedes Technician

4,460 satisfied customers

20 years Master Certified excellent fix rate and have access to factory wiring, and instructions.

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Michael Warfield

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Matt

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Mechanical Engineer with 23 years experience in the auto industry, 8 yrs in formula 1 engine testing

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Qualified mercedes diagnostic technician & service team manager , ATA registered Master tech

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