HOW TO WIRE A COMBINATION TWO SWITCH - Leviton Electrical Supplies

Brake light bulbs are illuminated within the rear combination light assemblies whenever the brake pedal is pressed. This happens because of the brake light switch (also known as the stop lamp switch) located above the brake pedal. Pressing the the brake pedal closes the internal contacts of the brake light switch which transfers power from the battery to the combination light assembly. For example, in a '94 Geo Tracker the STOP/HORN fuse (15A) supplies power to the brake switch via a green wire and then to the combination light assemblies via a green/white white wire whenever the brake switch contacts close. These are the only two wires for the brake switch. The combination light assemblies on the other hand have four wires; brake light input (green/white wire), tail light input (red/blue wire), turn signal input (green wire) and ground (black wire). If all of the brake lights are inoperative, chances are the brake switch has failed or the power-supply fuse has blown. This is because it is highly unlikely for all brake light bulbs to fail simultaneously (although not impossible). You can read more here: https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-brake-light-switch

Black wire to brass connection on switch. White wire to silver connector on receptacle. Add a wire from the silver side of switch to the brass side of the receptacle. When switch is on current flows through to it to receptacle then out white when something is connected to the receptacle.

Copy following links:
http://waterheatertimer.org/How-to-wire-combination-switch-outlet.html
http://waterheatertimer.org/images/Combination-switch-outlet-6.jpg

Gene
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If it worked before, it should be a wire to wire replacement. You are replacing a regular switch/outlet with another switch/outlet which just happens to be a GFI outlet.
Wire the old switch wires to the new switch and the old outlet wires to the new outlet.
Cut the breaker/s off first !!

1. If equipped, disable the SIR system. Disconnect the negative battery cable.
   
2. Remove the upper steering column cover.
   
3. Remove the lower steering column cover screws and lower the steering column cover.
   
4. Remove the 2 switch mounting screws and remove the switch.
   
5. Detach all wire connectors from the combination switch. Push locking tabs to remove the wires.
   

To install:

1. Attach all wire connectors to the combination switch.
   
2. Install the combination switch to the column with the 2 attaching screws.
   
3. Install the lower steering column cover screws and lower steering column cover.
   
4. Install the upper steering column cover and attaching screws.
   
5. Connect the negative battery cable.
   
6. Enable the SIR system, if equipped.
   

Bring a cable with 3 wires (hot, neutral, and ground) into the combination switch and receptical. The hot wire connects to the LINE portion to power on the receptical. Use another cable with 3 wires to connect the LOAD portion on the switch to power on the disposal. The black wire is the HOT wire that should be switched. The white wire is the NEUTRAL that can be tied together, and the green wire is the GROUND that can also be tied together.

Can you tell me where the outgoing wires are going to. Bare wire is ground goes in green color screw, white wire is neutral and goes in silver color screw, black wire is hot or live and goes in gold color screw. It is difficult to help you with little information. how do you know what is incoming and outgoing.

You cannot replace the switch with a switch/receptacle combo because there is no neutral wire. The black and white that you see are both used as hot wires. One is the Line and the other is the Load.

You have to install another 2 wire cable or replace the existing with a 3-wire cable. A 3-wire cable has a black, red, and white, plus the bare ground wire

power coming in from the breaker box: black wire will go to line-hot screw, and the white wire will go to the line-white screw. the switch wires coming out of the back of the gfci- 1 will go to the load-hot screw & the other black wire will wire nut to the black wire going to the light. the white wire going to the light must go to the load-white screw.

run 14-2 wire to power switches, then run one 14-3 wire and one 14-2 up to fixture..you will have an extra neutral but its okay... just tie all nuetrals together....this gives you the needed 3 hot wires!