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I have 07 freightliner with no blower in sleeper changed…

Customer Question
I have 07 freightliner...

I have 07 freightliner with no blower in sleeper changed rear controller and blower still no blower

Mechanic's Assistant: What is the complete model and serial number of your machine?

1FUJA6CK45LU38732

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

Rear cooler control & blower asm.

Submitted: 10 months ago.Category: Medium and Heavy Trucks
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Answered in 1 hour by:
9/22/2017
Technician: roybelding, Shop Foreman Freightliner trucks replied 10 months ago
roybelding
roybelding, Shop Foreman Freightliner trucks
Category: Medium and Heavy Trucks
Satisfied Customers: 7,888
Experience: Shop Froeman for Freightliner Trucks
Verified

hello, my name is ***** ***** I will be glad to assist you. please allow me a couple of minutes to gather some basic info.

Roy

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Technician: roybelding, Shop Foreman Freightliner trucks replied 10 months ago

how about to the fan switch??

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Customer reply replied 10 months ago
Power at switch and at blower no signal to energize blower
Technician: roybelding, Shop Foreman Freightliner trucks replied 10 months ago

if you have power at the blower, it is ground controlled.

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Customer reply replied 10 months ago
Ground at blower 1.2 from controller what is missing
Technician: roybelding, Shop Foreman Freightliner trucks replied 10 months ago

ground should read 0 volts. 1.2 is a bad ground

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Customer reply replied 10 months ago
It has a stepper assembly on blower that requires ground and low reference and power
Technician: roybelding, Shop Foreman Freightliner trucks replied 10 months ago

and it is controlled by the hvac unit itself

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Customer reply replied 10 months ago
that was replaced along with blower
Technician: roybelding, Shop Foreman Freightliner trucks replied 10 months ago

ok, then you have a wiring issue. you will need to load test each circuit to verify there is no internal damage

Roy

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Customer reply replied 10 months ago
ok we checked the harness from blower switch to controller no breaks and from controller to blower asm. harness, everything is ok what is locking the blower operation?
Technician: roybelding, Shop Foreman Freightliner trucks replied 10 months ago

did you ohm out all the wires?? load test the wires as well?? the 1.2 volts on the ground side of the blower indicates a voltage drop.

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roybelding, Shop Foreman Freightliner trucks
Category: Medium and Heavy Trucks
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