Nother Test!

[blacksnapon]

2006 6.0, defrost only, 4x4 doesnt work, key on, buzzing on passenger fender that never quits. Possible causes?

 

[5.0Flareside]

hmm..... not really sure.. gotta be something to do with the electrical... just would have to be there and looking at it to think....

 

[Blue Goose]

Lack of vacuum is the reason behind the defrost only and the 4x4 that doesn't work.

 

[5.0Flareside]

Lack of vacuum is the reason behind the defrost only and the 4x4 that doesn't work.

ok.. so those are vacuum operated?

 

[blacksnapon]

ok.. so those are vacuum operated?

Yep!!!!!!!!!!

 

[blacksnapon]

Lack of vacuum is the reason behind the defrost only and the 4x4 that doesn't work.

OK, possibilities?

 

[Truckin4life]

Kkey is on when buzzing occurs? Does it occur when running?

 

[blacksnapon]

Kkey is on when buzzing occurs? Does it occur when running?

YEP!!!!!!!!!!!

 

[Truckin4life]

I don't know much bout diesels, so its a guess.

Do to the turbo the intake is pressurized, so there is a vaccum pump, electric powered when the key is on. Pump fan broke? It turns but won't spin the fan to create any vac, off balance cusing the hum?

 

[blacksnapon]

I don't know much bout diesels, so its a guess.

Do to the turbo the intake is pressurized, so there is a vaccum pump, electric powered when the key is on. Pump fan broke? It turns but won't spin the fan to create any vac, off balance cusing the hum?

Nope, vacuum pump works fine. You're close though.

 

[Bax]

vacuum line to the spindle is either off or damaged. Loss of vacuum 4x4 dont work.. A/c vents dont open vacuum pump just runs when asked to go into 4x4. Replace the vacuum lines to the spindle.

 

[Bricks]

edited............

 

[blacksnapon]

vacuum line to the spindle is either off or damaged. Loss of vacuum 4x4 dont work.. A/c vents dont open vacuum pump just runs when asked to go into 4x4. Replace the vacuum lines to the spindle.

Yep! Possible line damage from the pump inside to the hvac controller.

 

[Bax]

Now lets fix that 6.0

 

[satcom40]

Is there a drawing of how this line runs my 4x4 is not working, I have the HUB in manual. this just started. MY heat work great.Thanks

 

[blacksnapon]

Around the area of the vacuum pump on the pass fender, you'll find vacuum lines (one with a valve in it). You can separate them there and test the integrity of the lines at that point with a vacuum pump. Because your heat works ok, check from that "tee" to the 4x4 solenoid, and from the solenoid to the hubs. Using the pump, you can check each hub for proper operation where the line goes in at the top of it.

 

[satcom40]

Ok I 'll look into that thanks