WARNING!!: ⚠️⚠️⚠️
Always use the proper tools and safety equipment to perform this job.
Failure to perform the job correctly can result in personal injury or vehicle damage.
Don't do this job if you think you don't have the experience or the equipment to do this job correctly. REMEMBER SAFETY FIRST!

Warning!!! ⚠️⚠️⚠️
This video is just a demonstration of the labor to do to perform this job, the results may vary.
Also, the damage found can be greater that expected and it can result in a massive engine failure.

This video contains advance technician information.

this process is going to be similar to all trucks with
freightliner western star mercedes benz
DD13 DD15 DD16 OM471 OM472 OM473


Topics discussed :
how to inspect a bad SCR box wiring
when to know when is time to replace the SCR harness
what type of problems you get with a bad wiring


The symptoms of the fault are:
red stop light on
check engine light on
yellow amber light on
regen light on
DEF light blinking
derate mode on
no power
5 miles per hour derate
vehicle does run more than 55 miles per hour




Tools need:
----


Parts needed
A4721504833 SCR harness



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