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Where r the 4 x4 shift actuators located - Silverado 1500 Chevrolet Cars & Trucks

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The shift actuators are mounted inside encoder motor housing.
All in one unit.

Posted on Oct 11, 2010

  • HispanikMekanic
    HispanikMekanic Dec 22, 2010

    Unit mounts on transfer case. Removal of short drive line will required in order to remove and replace encoder.

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94 merc grandmarkee wont go into park wont start will start if you wiggle in nutral


Park neutral safety switch could be bad , also the shift interlock safety system .
Shift Interlock System A brake/shifter interlock system consists of the following:
  • ignition switch (11572)
  • brake pedal stoplight switch (13480)
  • brake shift interlock module
  • brake shift interlock solenoid assembly (attached to key interlock assembly)
  • necessary wiring
On floor-shift vehicles, the ignition/shifter interlock cable (3F719):
  • locks the floor shift transaxle range selector lever in the PARK position when the ignition switch is in the LOCK position.
  • requires the floor shift transaxle range selector lever to be in the PARK position to turn the ignition switch to the LOCK position.
Condition Possible Source Action
  • Shift Interlock System Does Not Release or Lock Properly
  • Circuitry open/shorted.
  • Blown fuse.
  • Damaged stoplight switch.
  • Damaged shift lock actuator.
  • GO to Pinpoint Test A .

PINPOINT TEST A: SHIFT INTERLOCK SYSTEM DOES NOT RELEASE OR LOCK PROPERLY A1 CHECK ELECTRON IGN FUSE
  • Check Fuse 5 (5A) located in fuse junction panel.
Is fuse OK?
Yes No GO to A3 . GO to A2 . A2 CHECK FOR SHORT TO GROUND
  • Turn ignition switch OFF.
  • Remove Fuse 5 (5A).
  • Disconnect shift-lock actuator connector C203 located to the right of steering column.
  • Measure resistance of the Circuit 1003 (GY/Y) between the correct terminal of Fuse 5 (5A) and ground.
Is resistance greater than 10,000 ohms?
Yes No REPLACE Fuse 5 (5A). GO to A3 . SERVICE Circuit 1003 (GY/Y) wire between fuse junction panel and shift-lock actuator. A3 CHECK POWER SUPPLY FROM FUSE 5 (5A)
  • Reinstall Fuse 5 (5A).
  • Turn ignition switch to RUN.
  • Measure voltage on Circuit 1003 (GY/Y) wire and ground.
Is voltage greater than 10 volts?
Yes No GO to A4 . SERVICE Circuit 1003 (GY/Y) wire between interior fuse panel and shift-lock actuator. A4 CHECK POWER SUPPLY FROM FUSE 28 (15A)
  • Turn ignition switch OFF.
  • Disconnect connector C2016.
  • Turn ignition switch ON.
  • Measure voltage on Circuit 10 (LG/R) and ground.
Is voltage B+?
Yes No GO to A5 . SERVICE Circuit 10 (LG/R) for open. RESTORE vehicle and RETEST system. A5 CHECK WIRE BETWEEN STOPLIGHT SWITCH AND SHIFT-LOCK ACTUATOR
  • Turn ignition switch OFF.
  • Disconnect shift-lock actuator connector C203.
  • Apply brake pedal.
  • Measure voltage on Circuit 810 (R/LG) wire and ground.
Is voltage greater than 10 volts with brake pedal applied and less than 1 volt with brake pedal released?
Yes No GO to A6 . SERVICE Circuit 810 (R/LG) wire between stoplight switch and shift-lock actuator. A6 CHECK SHIFT-LOCK ACTUATOR GROUND
  • Measure resistance of Circuit 57 (BK) and ground.
Is resistance less than 5 ohms?
Yes No REPLACE shift-lock actuator. SERVICE BK wire.

Mar 30, 2017 | Cars & Trucks

2 Answers

Where is the vacuum shift motor located?


Gordon, I will take a guess, the Vacuum shift actuator/motor is located on the front axle. Check the attached pictures of actuator and how to replace video,links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
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Front Drive Axle 4wd Vacuum Disconnect Motor 1AFWA00007
Front Axle 4 Wheel Drive Actuator Replacement 4x4 Dodge Ram

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Where is the actuator and switch located on a 1991 chevy 1500 4x4


4x4 accuator is on the front axle,, in side of the differental,,the shifter is in the floorboard if manual or on the dash if its auto,,,electric,,,, sometimes people put 4 x4 stickers on a 2 wheel drive truck,, are you sure its a 4x4

Feb 21, 2015 | Chevrolet 1500 Cars & Trucks

1 Answer

4x4 lights blink 2 times and goes out and car wont go in 4 x4 or 2 wheel drive


DOES THE CAR START AND RUN ARE THERE BLOWN FUSES MAYBE WHAT ABOUT THE 4X4 CONNECTOR IS IT CLEAN ARE THE LINES HOOKED UP TO THE ACTUATORS HERE'S SOME PHOTO'S OF WHAT IS INVOLVED THERES A ACTUATOR VALVE THAT I CAN'T GET A PHOTO
4x4-lights-blink-2-times-goes-out-car-5n4gqeiomjfecw0egpemrrys-2-0.jpg

Feb 20, 2015 | 2003 Ford Expedition

1 Answer

Where is the shift interlock actuator located on my 1997 ford f250


2wd or 4wd?
shifting what, A/T M/T or 4wd.?
try to say what you have first then post a question specific to a part.
are you inside the tranny or just inside,car.???
her are lots of interlocks,
my wild guess, is a/T park lock circuits and parts. right?
inside car?

May 04, 2014 | 1997 Ford F250 SuperCab

1 Answer

Brake shift interlock solenoid


column or floor shifter ?
Brake Shift Interlock Actuator - Floor Shift Removal and Installation
NOTE: The brake shift interlock actuator is not serviced individually. If replacement is required, install a new floor shift selector lever assembly.
For additional information, refer to Selector Lever - Floor Shift in this section.
Brake Shift Interlock Actuator - Column Shift Removal and Installation
  1. Set the parking brake.
  1. Remove the steering column shrouds.
  1. Turn the ignition to the accessory position and apply the brake or actuate the brake shift interlock actuator (BSIA) override.
  1. Put the selector lever into the NEUTRAL position.
  1. Disconnect the BSIA electrical connector.
  1. Remove the BSIA screw.
  1. Gently pry the clip up and remove the BSIA.
  1. NOTE: During installation, verify that the BSIA override has been activated and the slider is fully rearward. Before rotating the selector lever from NEUTRAL into PARK, align the selector lever tab into the BSIA. To install, reverse the removal procedure.

May 26, 2017 | Ford Expedition Cars & Trucks

1 Answer

Where is the shift lock actuator located on my 1994 lincoln town car


located on column under dash left side of steering shaft. its easier to remove the plastic around the column and drop the four mounting nuts that hold the column up, then its easy to access

Jul 29, 2012 | 1994 Lincoln Town Car

1 Answer

Where is shift actuator located on 1999 Jimmy 1999


I had the same problem with my 1999 Silverado which would blink several times on the mode I selected then go back to the 2 wheel High. I found the switch module to be defective, after replacing it I have never had the problem again.

Nov 22, 2010 | 1999 GMC Jimmy

2 Answers

Four wheel drine willnot work front end making noise


Fuse is located at the end of eh dash on drivers side and the Actuator is located at the front differential and on the passenger side.
When in 4wd mode, a switch on top of the transfer case conducts 12 volts out to the actuator. Wire #50 (brown) is the 12v feed, and it conducts to the light blue wire (#900) to the actuator.
When shifted out of 4wd, the switch opens up and no voltage goes to the actuator.

Check voltage at the connector for the front actuator (at the front differential - it looks like a large bullet that threads into the front diff.) If it has 12 volts, the actuator is the problem. If it does not have 12 volts, check the transfer case switch and the power feed to the transfer case.

I'll assume it is the actuator, if the plug to the actuator is getting 12 volts when in 4wd.
The way this actuator works, is it is a sealed chamber that gets heated by voltage. When it heats, the pin in the end swells and pushes a shift fork in the front differential. The shift fork engages a spline on the passenger side of the differential, and boom! you have 4WD.

GM offered an upgrade to this actuator that is a motor instead of a heated device. However, it requires a small harness addition, a spacer, and a new actuator. It is about a $150 to $200 option.

Good luck. The actuator is usually the problem 90% of time but recheck all of the wire harness just to maker sure there is no short before replacing any parts. The actuator may not be fully engaged or disengaged and the fork to the spline may be what is causing the grinding.

88-UP C/K ACTUATOR UPGRADE
VEHICLE SERVICED: 88-99 CHEVROLET FULL SIZE
PURPOSE: IMPROVE AXLE CONNECT ENGAGEMENT TIME AND
COMPONENT RELIABILITY.

SYMPTOMS: NO FRONT DRIVE AXLE ENGAGEMENT WHEN SHIFTED INTO 4X4.

Obtain the following GM part numbers:
(1) 26060073 Actuator
(1) 88959465 Harness/Spacer Kit

Mar 06, 2010 | 1996 GMC Yukon

2 Answers

I have a 2002 Chevy Silverado 8 cylinder 4wd extended cab. It has the push button shifter for 4wd. When I try to use 4WD Auto or 4WD Hi, the indicator lights come on but the 4wd does not engage. I read...


Fuse is located at the end of eh dash on drivers side and the Actuator is located at the front differential and on the passenger side.
When in 4wd mode, a switch on top of the transfer case conducts 12 volts out to the actuator. Wire #50 (brown) is the 12v feed, and it conducts to the light blue wire (#900) to the actuator.
When shifted out of 4wd, the switch opens up and no voltage goes to the actuator.

Check voltage at the connector for the front actuator (at the front differential - it looks like a large bullet that threads into the front diff.) If it has 12 volts, the actuator is the problem. If it does not have 12 volts, check the transfer case switch and the power feed to the transfer case.

I'll assume it is the actuator, if the plug to the actuator is getting 12 volts when in 4wd.
The way this actuator works, is it is a sealed chamber that gets heated by voltage. When it heats, the pin in the end swells and pushes a shift fork in the front differential. The shift fork engages a spline on the passenger side of the differential, and boom! you have 4WD.

GM offered an upgrade to this actuator that is a motor instead of a heated device. However, it requires a small harness addition, a spacer, and a new actuator. It is about a $150 to $200 option.

Good luck. The actuator is usually the problem 90% of time but recheck all of the wire harness just to maker sure there is no short before replacing any parts. The actuator may not be fully engaged or disengaged and the fork to the spline may be what is causing the grinding.

88-UP C/K ACTUATOR UPGRADE
VEHICLE SERVICED: 88-99 CHEVROLET FULL SIZE
PURPOSE: IMPROVE AXLE CONNECT ENGAGEMENT TIME AND
COMPONENT RELIABILITY.

SYMPTOMS: NO FRONT DRIVE AXLE ENGAGEMENT WHEN SHIFTED INTO 4X4.

Obtain the following GM part numbers:
(1) 26060073 Actuator
(1) 88959465 Harness/Spacer Kit

Feb 03, 2010 | 2002 Chevrolet Silverado

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