Question about 1996 Lincoln Town Car

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Steering colum vacuum lines

There are two vacuum lines that are not hooked up on my steering colum - one comes in from the firewall and the other branches off . the guy that rebuilt my steering colum did not hook these up. One , I believe goes to the steering switch that makes it easier to turn the steering wheel and the other goes to the parking brake that when you put it into drive, the parking brake automatically disengages. help.

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  • Anonymous Mar 16, 2014

    which power steerting hose goes to where on the steering colum


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They shoud both go to the vacuum switch on top of the column one is the vac source and the other goes to the release

Posted on Nov 25, 2008

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1 Answer

Vacuum line issue

In most GM vehicles only two vacuum lines pass through the firewall. One as you mentioned is the vacuum source (your black line) the other usually controls a valve that turns off coolant flow through the heater core while the A/C mode is turned on.

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The mode selection is done through a series of air doors that are operated by vacuum. When there is either a partial or total loss of vacuum, the system will default to either defrost or on some vehicles, heat. Acceleration can also have an effect on the doors for the same reason.

Look under the hood for a small black plastic hose coming through the firewall. Follow it to the vacuum source looking for any breaks, cracks or leaks. Also follow any other lines that branch off because they may go to a vacuum reservoir (storage tank) and a leak there will cause the same problem. Using a vacuum gauge to determine if you have full vacuum at any given point is the best way to find it. You can cut into the line anywhere and splice it back together with a piece of vacuum hose. Find the broken line, you found your problem.

Aug 13, 2013 | 1999 Buick Century

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How do i take out the heater core on a 1997 dodge dakota?

dammm ok make sure you have about 5 hours allowed to do this need to disassemble the under side of dash, both side panels and steering colume panel, remove the colume saddle and let the colume and wheel lay on the seat, all screws across the top of dash and sides
dash must come out , take your time and carefully remove all plugs and gauge attachments, pop the hood un hook your heater lines and either crimp em off or drain and retain coolant now the other bummer,you need to un hook the ac coolant lines you may need a disconnect tool 8 big ones at auto zone now back to the cab remove heater/ac box unscrew the on screw behind the htr core it will slide right out, install new and reverse good luck it isnt to bad
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1 Answer

My 1997 ford ranger a/c dash vents won't blow

Vacuum supply starts on the drivers side of the engine. There is a vacuum line going into the brake vacuum assist from the manifold. branching off of that line is a double line that snakes under the intake manifold, behind the valve cover, along side the valve cover on the passenger side headed to the front of the engine. Then it curves to the right side of the engine. One set of hoses from this line goes to a valve control (red and green i think). The other line goes to the vacuum storage ball, it should be black. The vacuum circuit continues out of the ball in another black line that snakes into the firewall. It goes under the heater core black box and disappears under it. Now go into the passenger compartment and drop the glovebox. look to the back right you will see a black and a white vacuum line coming out of the firewall. The black line is your vacuum supply from the engine. It goes up to a little rubber manifold. disconnect the lines coming from the dash switch and check for vacuum on the manifold where the black line is going in. The white line controls the cabin air intake under the glovebox and the thermostat shutoff under the hood. It should only have vacuum when the switch is in a certian position, AC probly. The other three lines coming off the rubber manifold snake behind the dash vent door assemble and come out near the gas peddle. The red one controls the dash vent. apply vacuum to the red hose and see if the vents go to the center dash position/AC. The yellow and blue? ones control the floor vent control near the gas peddle. yellow gives you half floor and half defrost. blue gives you all floor. you can use a small vacuum line to connect the black vacuum supply to each individual line on the manifold and check the function of each vacuum control assembly individually. I hope this helps. On my truck each control unit works fine when i apply vacuum to them individually but when I hook the dash switch up to the rubber manifold it goes to defrost. I tried changing the dash switch and the lines running from the switch to the rubber manifold and the vacuum ball under the hood, nothing works. I suspect I may have leak i just haven't found yet. next step is to get a vacuum gage and start checking the amount of vacuum i am getting at each vacuum line. I'm sure it is supposed to be getting a specific amount of vacuum and will not work if the vacuum drops below a certian level due to a leak in a line somewhere? God bless.

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Nov 09, 2011 | 1998 Buick LeSabre

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Low beam head lights are not working. High beams only work when you put the switch on then push the high beam arm on the steering wheel

you may have a problem with the dimmer switch for the headlights.its located on the top of the steering colume at the base of the colume near the firewall.

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1 Answer

I have a 1995 Oldsmobile Cutlass Surpreme and the AC blows out of the deforst lower and upper vents but does not blow out of dash vents. Any suggestions?

check the vacuum line that comes to the firewall. It should come off the intake manifold and then branch off to the firewall. sometimes they get disconnected or broken.

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The only hoses that should be coming through the firewall would normally be the heater hoses but they would generally be more in the middle or on the passenger side of the vehicle. Do these appear to be add on type or original equipment? If someone has added something it would be a strange location.

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1 Answer

I have a 98 honda accord 4 cyl it leaks power steering fluid and is wet whare the boot meets the fire wall on the steering colum im not sure if it is the gear boxs or what .

wash it all down let dry or blown dry, fill with fluid start car and have someone slowly turn wheel as u watch. the rack can be bad but be careful these cars the metal line to rack near firewall rot and leak it can fool you, remove the cover that covers lines by were u see leak to get a better look,may just be a line,alot cheaper than a rackinpinion gear, hope this helps.

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1 Answer

Where would I locate the 'air difuser' or where to look to see if the vacuum line for the a/c has come off or not?

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The vacuum line comes from the engine manifold and goes through the firewall to the heater control head. There is also a tee in the line that branches off to a vacuum reservoir that provides vacuum when going up steep hills, so the system does not default to defrost.

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