Foot brake wiring harness

New set will have a plug on it so don't be concerned about just cutting the plug off to get the old harness out. You have to remove the steering wheel and anything above the turn signal switch to give access to the little pivot bolt the switch is mounted by. Remove this pivot screw/bolt and pull the unit out. After the plug has been cut off the end of the signal harness, the wires will come out easily. Put all that aside, grab your new turn signal unit, Turn the plug on it's side, flat on the wires, and feed it down thru the column housing until the new switch is in position to bolt back on. Now put it back together in reverse of removal.

there are many unused wires on nearly all wiring harnesses as they are usaully used on many different models and makes if everything is working don't let it worry you

Instructions

1. Removing the Turn Signal Switch
   • Disconnect the negative power cable on the battery. The battery needs to be isolated while working on the electrical system.
     
   • 2Remove the steering column shroud with a Phillips-head screwdriver. The shroud will come off in two pieces. One will come off from the top and the other will come off from the bottom.
     
   • 3Pull the turn signal lever out while twisting it forward. The lever is connected to the multi-switch.
     
   • 4Remove the wiring harness running in back of the multi-switch. Place the wiring out of the way so you can remove the switch,
     
   • 5Unscrew the switch with a Phillips-head screwdriver. The switch will come out once the screws have been removed.
     
   Installing the New Switch
   • 6Install the new switch. Tighten the screws to hold the switch securely.
     
   • 7Attach the wiring harness back to the switch. The harness should plug into the switch. Push the harness connector into the switch until it clicks into place.
     
   • 8Install the turn signal lever. Push in and twist it back toward the dash to lock it in place.
     
   • 9Place the steering column shroud back on the steering column. Be sure to tighten the screws to position the shroud in place.
     
   • 10Reconnect the battery. Crank your Blazer to test out the switch. Attempt to run everything on the switch to ensure you have a good multi-switch.
     

Wire is probably broke somewhere in the harness start form the pedal and sort through them there shouldnt be any issue between the steering column and the brake lights

Multifunction Turn Signal Lever Replacement - On Vehicle

Removal Procedure

1. Verify that the multifunction turn signal lever is in the center of the OFF position.
2. Disconnect the negative battery cable.
3. Disable the SIR system.
4. Remove the steering wheel.
5. Remove the steering column trim cover.
6. Remove the steering column knee bolster.
7. Remove the steering column wire harness (1) from the steering column wire harness retainer (2).
8. Remove the 2 wire harness straps from the steering column wire harness (1).
9. Remove the steering column bulkhead connector from the vehicle wire harness.
10. Disconnect the connectors from the multifunction turn signal lever steering column bulkhead connector.

1. Remove the retaining bolts (1) from the multifunction turn signal lever (2).
2. Remove the multifunction turn signal lever (2) from the steering column.

Installation Procedure

1. Install the multifunction turn signal lever (2). Use a small flat-blade in order to compress the electrical contact and move the multifunction turn signal lever into position.
2. Verify that the electrical contact rests on the canceling cam.

Notice: Refer to Fastener Notice in Service Precaution.

1. Install the retaining bolts to the multifunction turn signal lever.

• Tighten the retaining bolts to 7 Nm (62 inch lbs.) .

1. Connect the gray and black connectors to the multifunction turn signal lever steering column bulkhead connector.
2. Connect the steering column bulkhead connector to the vehicle wire harness.
3. Install the two wire harness straps to the steering column wire harness (1).
4. Install the steering column wire harness (1) to the steering column wire harness retainer (2).
5. Install the steering column knee bolster.
6. Install the steering column trim cover.
7. Verify that the lever is in the center or the OFF position.
8. Install the steering wheel to the steering column.
9. Enable the SIR system.
10. Connect the negative battery cable.

I hope this helps you.

Thanks

Removal & Installataion

1. Verify that the multifunction turn signal lever is in the center of the OFF position.
   
2. Disconnect the negative battery cable.
   
3. Disable the SIR (air bag) system. Refer to the Chassis Electrical Section.
   
4. Remove the air bag module from the steering wheel.
   
5. Remove the steering wheel.
   

Remove the upper and lower steering wheel trim covers using the following procedure.

• Remove the tilt lever assembly.
  
• Remove the two pan head tapping screws from the lower shroud.
  
• Unlock the upper and lower shroud.
  
• Remove the two Torx® head screws from the upper shroud.
  
• Remove the upper shroud.
  

Remove the wire harness straps from the wire harness assembly and detach the wiring harness connectors from the switch side connectors.

Remove the two multifunction turn signal switch screws and remove the multifunction switch assembly from the vehicle.

To install:

1. Install the multifunction switch to the steering column. Use a small flat-blade prytool to compress the electrical contact and move the multifunction turn signal switch into position. Verify that the electrical contact rests on the canceling cam. Install the screws and tighten to 62 inch lbs. (7 Nm).
   
2. Route the wire harness along the steering column jacket assembly and secure into the wire harness strap. Install a new wire tie to the upper tilt head assembly and another lower along the wiring harness, as the original installation.
   
3. Verify that the lever is in the center of the OFF position.
   
4. Install the upper and lower steering column shrouds.
   
5. Route the SIR connector through the steering wheel, align the scribe mark on the steering wheel made at removal, with the slash mark on the steering shaft and install the steering wheel. Install the steering shaft nut and torque to 30 ft. lbs. (41 Nm).
   
6. Install the horn contact leads and the air bag connector to the back of the air bag. Make sure the CPA wedge is in place to secure the connector. Install the air bag by gently pushing on both the right and left sides of the air bag until the retaining springs engage.
   
7. Enable the SIR system by connecting the yellow 2-way connector at the base of the steering column and installing the air bag fuse.
   
8. Connect the negative battery cable. Test the horn, turn signals and headlight operation.
   

bad relay or a bad wire

Possibly the switch at the bottom of the steering column, that the rod pulls on. May be loose, or worn out.

THE PROBLEM IS IN THE MULTIFUNCTION SWITCH, REPLACE IT.

95-97 blazer or 94-97 S-10
12volts red (there will be 2)+ ignition harness
Starter purple or yellow + ignition harness
Ignition pink + ignition harness
Second Ignition white or pink/white + ignition harness
Accessory orange + ignition harness
Power Lock lt. blue + either kick panel
Power Unlock white + either kick panel
Lock Motor gray drivers kick panel
Unlock Motor tan drivers kick panel
Parking Lights+ brown switch or rear harness
Door Trigger white - keyless module
Dome Supervision use door trigger
Trunk/Hatch Pin tied in with doors
Trunk/Hatch Release black/white + switch or keyless
Tachometer white AC ECM
Brake Wire white + at brake pedal switch
Parking Brake black at the pedal
Horn Trigger black - steering column