Vacuum?

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Apr 15, 2005 | 03:38 PM

portlandtn

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Joined: Jan 2005

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Vacuum?

OK crew,

I have a 99 SD 4x4, 7.3 liter. I have discovered recently that my blower selector for the fan is not changing when I turn the ****. I am by no means a mechanic. I do understand this control is powered by vacuum.

I opened the hood and stood back and appreciated that big engine first. Then I tracked down what appeared to be the vacuum tack behind the passenger side battery.

I disconnected a vacuum line and as I did with my old 351 cleveland, proceeded to put my finger over both sides to see if there was any suction,---not---. Then I realized that the line I was checking ran to the front axle, must be what the **** to control the 4x4 on dash has something to do with, duh!

QUESTION. Without a manual, Where the heck is the pump, which fuse powers it, and where can I find the fuse. I found a box in front of driver in corner of engine compartment, is the fuse there, and which one?

This is the first time I am trying to work on this truck myself. I am sick of getting overcharged at the dealer and I am willing to be patient to do it myself.

Thanks Joey in Portland TN

Apr 16, 2005 | 08:35 PM

Ultramagdan

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Joined: Feb 2000

Posts: 11,496

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From: Kansas

I think that was the vacuum reservoir tank you were messing with.

My DVD doesn't show me the location of it. The pump looks like a cruise control motor.