I need to see a picture of vacuum diagrams for the vacuum lines that are reach from the "radio cavity" the blue one is disconnected and I want to reconnect it. the vehicle is 1990 cadillac sedan deville.

One of these links should take you to a page containing a schematic showing the routing of the vacuum hoses. Need pictured vacuum diagram for 1983 oldsmobile 307, 5.0 - Fixya

Chevrolet Vacuum Line Diagrams / Chevrolet Blazer And Gmc Jimmy 1969 1982 Vacuum Diagrams Repair Guide Autozone : 305 v8 engine diagram best wiring library 1997 chevy 305 engine diagram vacuum line picsdiagram for 305 w qjet. (scoobydoomemes.blogspot.com)

Hi,

you can call Ford and ask them to email you the vacuum line diagram. Otherwise, you would need to reach out to local Ford dealers to ask them to email you the diagram.

Thank you.

You should have a vacuum line diagram under the hood of your car you can buy the haynes repair book for your vehicle at any autozone or advance auto someplace like that

"All Data" is a great source for diagrams, routing etc... If there isn't a diagram under the hood, I would sign up with all data. I have used them on several occasions or a number of different cars nd trucks and have been able to find the info that I needed to get the job done. Good luck!

Take a look at the vacuum disconnect motor on the front axle ( picture below ) to see if it is trying to move. Item #10 in this picture



Close up


IF this is not moving, could be :
1. The transfer case contact plates are not signaling the GEM ( Generic Electronics Module ) that the truck is changing mode from 4WD to 2WD. Check the connector on the side of the transfer case.
2. Vacuum is not being applied to the pink vacuum line on the vacuum disconnect motor ( 2WD mode, light blue is 4WD ). Check with a vacuum gauge that there is vacuum there.

Is the system ESOF ( Electronic Shift On the Fly ) or MSOF ( Mechanical Shift On the Fly ) ?

If you have already tested to find the front drive shaft locks into place, and the front axle is the cause, looks to the front vacuum disconnect shift motor.
Item #10 in the parts diagram below :


Close up of it ( this is a picture from another person's bracket that broke ) :


Chances are the vacuum lines to the vacuum disconnect motor are cracked, the vacuum solenoids are not working correctly, or the vacuum to the solenoids is having an issue ( the reservoir ) :
Vacuum diagram for the shift motor


The pink line is vacuum for 2WD operation ( unlocks the axle ) the light blue vacuum line is for 4WD operation ( locks the axle ).

You can test right at the vacuum disconnect motor with a vacuum gauge with the motor running. Unplug the shift motor, and check for vacuum right at the motor.

Could be the shift motor has a damaged diaphragm and not holding vacuum or has water in it ( saw that 1 time ).

Start with checking for vacuum. Also check the fuses for the vacuum solenoids, the power is always at the solenoid, ground is switched on and off by the GEM ( Generic Electronics Module ) to operate them

Hope this helps:
Cavity/Fuse Diagram (1996 Grand Cherokee, passenger side kick plate to find, Owner's Manual pgs 205-206): 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

Row 1: 1-6 (left to right) Row 2: 7-12 Row 3: 13-18 Row 4: 19-22
1996 Jeep Grand Cherokee Fuse Panel (Passenger Side kick panel) Reply

CAVITY FUSE DESCRIPTION 1 -10 amp (RED) Radio 2 -15 amp (Lt Blue) Cigarette Lighter 3 -10 amp (RED) Rear Washer Switch, Body Controller 4 -10 amp (RED) Airbag 5 -10 amp (RED) Lamp Out Module, Overdrive Switch, OBD II 6 -15 amp (Lt Blue) Vehicle Information Center/Graphic Display Module Park & Side Lamps, Overhead Console Lighted Visor, Automatic Dimming Mirror 7 -20 amp (Yellow) Body Amp, Cluster, Body Controller 8 -20 amp (Yellow) Rear Wiper Motor, Flipper Glass Solenoid, Cargo Lamp, Trailer Tow 9 -15 amp (Lt Blue) Brake Switch 10- 10 amp (RED) Rear Window Defroster 11 -10 amp (RED) ABS Module 12 -10 amp (RED) Heater-Ventilation-A/C Control & Recirculation Motor 13 -15 amp (Lt Blue) Hazard Switch, Turn Signal Switch 14 -15 amp (Lt Blue) Spare 15 -15 amp (Lt Blue) Spare 16 -10 amp (RED) Right & Left Courtesy Lamp, Glove Box Lamp, Halo Lamp Cargo Lamp, Underhood Lamp, Dome/Read Lamp Right & Left Visor, Automatic Dimming Mirror 17 -15 amp (Lt Blue) Radio Illumination, Tail Lamp, Graphic Display Module, Park & Side Lamps, Headlamp Switch, Body Controller 18 -20 amp (Yellow) Spare 19 -15 amp (Lt Blue) Passing Light 20 -15 amp (Lt Blue) Radio, Heater-Ventilation-A/C, Vehicle Information Center 21 -15 amp (Lt Blue) Power Outlet 22 -10 amp (Blue) Airbag Module -------------------------------------------------------------------------------------
1996 Jeep Grand Cherokee Alarm, Remote Starter, Keyless Entry Wiring Information Constant 12V+ Pink/Black Ignition Switch Harness Starter Yellow Ignition Switch Harness Ignition Dark Blue/Gray Ignition Switch Harness Ignition 2 Red/Black Ignition Switch Harness (for AC) Accessory Black/Orange Ignition Switch Harness Tach Gray/White Coil Brake Switch White/Tan Brake Switch Trunk Pin n/a Works with Dome Light Parking Lights Blue/Red (+) Left of Steering Column or Light Switch Head Lamp Tan/Black Light Switch Factory Disarm Purple/Yellow (-) Driver's Kick Panel Black Connector at ECM Door Trigger Yellow (-) Driver's Kick Panel see notes Door Lock 5/Wire in Driver's Inside Driver's Door Orange/Purple Lock Pink/Black Unlock Door Unlock and Passenger's Doors Inside Passenger's Door Black/White L Pink/Black Unlock Horn Wire Gray/Orange (-) Steering Column Windows Up LF=Light Blue, RF=Brown/White, LR=Blue/White, RR=Gray/Black Doors Windows Down LF=White, RF=Purple/White, LR=Red/Black, RR=Green/White
• Cruise Control Information • Stereo Information • View all Jeep Vehicles

Lift and support the front of the truck so the front wheels are off the ground ( take safety precautions, chock wheels, jack stands, etc )
Key on, engage 4x4 and try to turn the front drive shaft.
If it turns it is a problem with the transfer case.
If it doesn't it is a front axle engagement problem.

If the front axle does not turn, the cause generally has to do with the Vacuum disconnect motor on the axle ( Item #10 in this picture ) :

Close Up :


The vacuum disconnect motor is operated by the vacuum axle disconnect solenoids on the firewall


You can test from here with a vacuum pump ( i.e. mightvac ) to see if the vacuum lines to the vacuum disconnect motor are good.
The pink vacuum line is 2WD operation, the Light Blue vacuum line is 4WD operation.
If the vacuum lines test good from here to the disconnect motor, and applying vacuum locks the front axle, it is either the vacuum solenoids, or the vacuum reservoir behind the battery, or the vacuum lines to the solenoids.
The solenoids have + VDC all the time, and the GEM applies ground to the correct solenoid to engage or disengage the front axle.

I would suspect the vacuum disconnect motor or the vacuum solenoids for the disconnect motor ( or the vacuum lines ), but best to confirm
Lift and support the front of the truck so the front wheels are off the ground ( take safety precautions, chock wheels, jack stands, etc )
Key on, engage 4x4 and try to turn the front drive shaft.
If it turns it is a problem with the transfer case.
If it doesn't it is a front axle engagement problem.

With the engine running ( and wheel chocked, parking brake on ) have someone shift into 4WD, and watch the shift motor to see if it operates
It is on the front axle, looks like this


If the disconnect motor does not shift, you can check the vacuum on the lines with a vacuum gauge. Blue line is 4WD operation, pink line is 2WD operation.
The vacuum solenoids are on the firewall, and look like this


This is the block diagram for the ESOF vacuum operation of the disconnect motor.


This is assuming you have checked the fuses for the transfercase shift motor, and the vacuum solenoids.

Fuse 1: 30A, Green; A/C Heater Motor Fuse 2: 30A Silver (Circuit Breaker); Power Windows Fuse 3: 15A Light Blue; Overhead Consule, Day/Night Mirror, Reverse Lamps Fuse 4: 5A Tan; ABS (There is not on in the picture) Fuse 5: 20A Yellow; Power Door Locks Fuse 6: 20A Yellow; Horn Relay, Instrument Cluster, Radio Choke Relay (on Premium audio system) Fuse 7: 10A Red; Buzzer Module, Stop Lamps Fuse 8: 20A Yellow; Headlamp Switch Fuse 9: 15A Light Blue; Cigar Lighter Fuse 10: 20A Yellow; Windshield Wiper Fuse 11: 20A Yellow; Turn Signal Fuse 12: 10A Red; Radio Fuse 13: 4A Pink; Recives power from Fuse 8 to power instrument lights (such as the cigar ligher lighting, ash tray light, dash lights, radio lights, etc.) Fuse 14: 15A Light Blue; Instrument Cluster Fuse 15: EMPTY Fuse 16: 5A Tan; Buzzer Module, 4WD Indicator Lamp, Tranny O/D Switch, Tranny Oil Temperature Sensor Fuse 17: EMPTY Fuse 18: EMPTY Fuse 19: EMPTY Fuse 20: 25A Natural; Park Lamp Relay, Off Road Lamp Switch (There is not one in the picture, I believe this is only on vehicles with fog lamps)
NOTE 1: Fuse 3 and Fuse 14 provide power for the Airbag Control Module Cavities 2, and 1, respectivly. NOTE 2: Fuse 4, Fuse 7 and Fuse 11 provide power for the Controller ABS Brake Cavities 7 and 12, 9, and 3, respectivly.
Under Fuse 4, 8, and 12 is the Buzzer Module (Black rectangle in the picture) Under Fuse 16 is the Hazard Flasher (Silver circle in the picture) Under Fuse 20 is the Horn Relay (White plastic looking in the picture) To the side of Fuse 17 and 18 is the ABS Warning Lamp Relay (Open cavity in the picture) To the side of Fuse 19 and 20 is the Turn Signal Flasher (Blue circle in the picture) Between the Turn Signal Flasher and the Horn Relay is the Time Delay Relaly (the other Silver Circle in the corner, in the picture