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 go-west.. Your Own Question
go-west..
go-west.., Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 1192
Experience:  Technican with 20 years experience focused on engines and electrical.
35815791
Type Your Medium and Heavy Trucks Question Here...
go-west.. is online now
A new question is answered every 9 seconds

2006 Columbia fan doesn't work, have replaced fan switch,

Customer Question

2006 Columbia bunk fan doesn't work, have replaced fan switch, fan, and thermocontrol
Submitted: 12 months ago.
Category: Medium and Heavy Trucks
Expert:  go-west.. replied 12 months ago.
Good morning
Was I talking to you about this before -
Customer: replied 12 months ago.

did not receive answer, stopped after was talking to you about this before, but this is first time

Expert:  go-west.. replied 12 months ago.
OK
Do you have power and ground and the big blue and big black wire at the blower?
Customer: replied 12 months ago.

have power but i'am grounding to cab,big black plug to fan,blueish green plug to thermocontrol

Expert:  go-west.. replied 12 months ago.
The big blue wire at the fan has power?
The big black has ground?
Customer: replied 12 months ago.

black is good ground, but have big orange hot wire no blue

Customer: replied 12 months ago.

black is good ground, but have big orange hot wire no blue. i'am working on the bunk fan

Expert:  go-west.. replied 12 months ago.
Is there power at the big orange?
Customer: replied 12 months ago.

yes

Expert:  go-west.. replied 12 months ago.
Is the a bunk fan switch in the dash if so is it in the middle position?
Customer: replied 12 months ago.

yes there is a switch in the dash labeled bunk ovrd and it is in the middle position

Expert:  go-west.. replied 12 months ago.
Does the fan work when the switch is in the on position?
Customer: replied 12 months ago.

no it does'nt

Expert:  go-west.. replied 12 months ago.
OK thanks
Now at the front fuse box infront of the passenger you will see 4 power studs. Bat.ign.iso.acc. Is there power there at all 4 studs?
Customer: replied 12 months ago.

no power to front two,back two are hot

Expert:  go-west.. replied 12 months ago.
I'm going to need the last six of your VIN please
Customer: replied 12 months ago.

U41833

Expert:  go-west.. replied 12 months ago.

https://www.dropbox.com/s/1ziysahw5coxtcr/hvac%204.pdf?dl=0

https://www.dropbox.com/s/s2fbc6ylahaseko/hvac%201.pdf?dl=0

sorry for the delay

the diagram shows the layout of the sleeper hvac

look at the diagram that has the sleeper blower control,the wire thats says feedback is the wire that signals the blower on,Check it for grnd opens and shorts,On the other diagram it shows the

fuses in the b pillar pdm ,make sure they are ok..Let me know how you do..

Customer: replied 12 months ago.

sorry had to get other trucks rolling. Fuses good,no grnd shorts or faults,traced wires from switch thru bunk no breaks rubs or burns

Expert:  go-west.. replied 12 months ago.
Is there power at the fan switch?
Customer: replied 12 months ago.

yes center pin has power

Customer: replied 12 months ago.

yes center pin has power.should light in bunk ovrd switch in dash stay on? it does for about 5 secs then goes out

Expert:  go-west.. replied 12 months ago.

https://www.dropbox.com/s/ym90ttsn12v0u2f/water%20valve%20columbia.pdf?dl=0

sorry for the delay

use this diagram to diag

start off at the fan motor switch and diag the cicuits,you may fin corrosion here..let me know how you do.

Customer: replied 11 months ago.

checked and cleaned all connections,tested wires from fan switch and climate control switch all good. bunk ovrd switch light does not stay on in middle position driver says it used to stay on goes out after 5secs

Related Medium and Heavy Trucks Questions