Is the black wire in electricial the hot wire????

Open following link to see specific wiring diagram:
http://waterheatertimer.org/How-to-wire-switches.html#combo2

There is only one Hot wire inside each household 120volt single-phase wall or ceiling box.
Unless wiring is off-code.
Hot wire is usually the black wire coming from circuit breaker.
White wire that arrives inside same cable with Hot black is the Neutral wire.

The other black and white wires evidently go to light fixture.
Which wire is Hot?
Separate black wires, turn power ON, tape tester leads to wood sticks, test each black wire to bare ground wire. Tester lights up on hot wire. Or separate black wires and use non-contact voltage tester.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Usually the black is Hot.
Test each wire to bare ground wire, and tester lights up on Hot wire.
What are you wiring?
What is a mobile?
What terminals are you connecting to? What color is each screw terminal?
What voltage are you using? Only 120volt single-phase has 1 hot wire.
If you have split-phase 230V from UK or 240Volt in US, then both wires can be hot.
http://waterheatertimer.org/How-to-wire-switches.html
http://waterheatertimer.org/See-inside-main-breaker-box.html

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Add another line to 120V switch.
To begin, inside your switch box, there must be at least two cables.
Each cable has a black-wire and white-wire and bare ground wire.

If your box has only one cable, then you cannot use that for your junction.

OK, your box has 2 cables.
One cable comes from circuit breaker box. These are called Line wires. There is a Black Hot and White Neutral.
The other cable goes to light. These are called Load wires.

You are going to add a new cable with a black-wire and white-wire

In back of box, the white wires are twisted together and covered with wire nut.
These white wires are called Neutrals.
Add your new white wire to these other white wires.

The switch has 2 black wires. One black wire is the Hot line wire.
Add your new black wire to the switch screw that has the Hot.
Of course the switch has 2 black wires, so how do you know which is the Hot.
Turn light switch off, turn power ON, and test each black wire to bare ground wire.
Tester lights up on the Hot.

Review:
New white wire connects to other white wires that are twisted together and covered with wire nut.
New black wire connects to Hot wire.
Ground wires are connected together.

On your new receptacle, the black wire connects to brass screw, and white wire connects to silver screw.
Screws are color-coded to tell electrician how to wire.
http://waterheatertimer.org/Color-codewire.html
http://waterheatertimer.org/B220C.html
http://waterheatertimer.org/See-inside-main-breaker-box.html

make sure you have turned the control knob to the "on" position. this is a milivolt system. the pilot make all the electricy to run the burner. make sure the pilot os blue and torch like not yellow and lazy. on the gas valve there are 3 wire connection point. one has a red wire one a white wire and the other lets say a black. with the thermostat turned down all the way jumper the red wire post to the one that doesn't have the white wire connected to is. this will by pass the thermostat. did it come on great check for loose connection didn't come on dang pilot generator may be weak and need to be replaced

Electricial problems are the worse kind. If you believe there is a bare wire touching the frame you may be right, but in my experience most electricial problems can be traced back to a bad ground.
Follow your grounds and see if one is corroded or loose. also look at the wiring harness for places of possible touching to the frame or something else a wire could be grounding out. I like to explain it as chasing your tail much like a dog until you catch it. Electricial problems are no fun and extremely hard to diagnos online. I hope you find it fast and I hope my advice was helpful.

Old timer: Intermatic EJ500 & ST01C timers have a battery. Battery operates the clock motor. Red wire is for 3-way circuit [a hallway with 2 switches is a 3-way circuit].

Utilitec timer, clock runs on 120Volt circuit instead of battery. So clock has to have power.

How to connect wires:
Black timer wire connects to hot wire from breaker box.
Red (or blue) timer wire goes to landscape lights.
White timer wire connects to white neutral wire [or if no neutral is available, connect to bare ground wire].
Green timer wire goes to bare ground wire.

How to find black hot wire and white neutral wire inside box: Disconnect and separate wires so you can test. Use ordinary tester. Power is on. There is only 1 black hot wire inside each electrical box. Test each black wire to bare ground until tester light comes on > that identifies the black hot wire. Next, test black hot wire to white wires until tester light comes on > that is the neutral wire. Exception: This test does not necessarily work with 3-way switches since they reverse each time switch is thrown.

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http://www.intermatic.com/products/timers/mechanical%20time%20switches/24%20hour%20dial%20with%20skipper.aspx
T1905 has 4 screws: NO normally open > NC normally closed > COM > Clock
NO screw is on left
NC screw is 2nd from left
COM is 2nd from right
Clock is on right

A) How to wire t1905 for 125V
You will have four wires >> a Black and White from breaker box; and a Black and White to load

1) Black hot wire from breaker connects to COM
2) White neutral wire from breaker box connects to Clock
3) White neutral wire to load connects to Clock
4) Black wire to load connects to NO -or- NC screw [one of these screws will have no wire attached]
NO turns 'off' with times set on timer
NC screw turns 'on' with times set on timer
If you want your load to turn 'on' when timer clicks 'on' then connect Black wire to NC screw

B) How to wire t1905 for 240V
You will have four wires >> 2 hot wires from breaker box; and 2 hot wires to load. These wires might be Black and White or Black and Red



1) Black hot wire from breaker connects to COM
2) Red or White hot wire from breaker box connects to Clock
3) Red or White hot wire to load connects to Clock

4) Black hot wire to load connects to NO -or- NC screw [one of these screws will have no wire attached]

NO turns 'off' with times set on timer
NC screw turns 'on' with times set on timer
If you want your load to turn 'on' when timer clicks 'on' then connect black wire to NC screw

You need an electrician here, as it obvious you dont understand what it is your seeing Bothy the black and the white wires are live and are really the same wire.

The main power line say red and black return are the two true power wires in the ceiling. OK the red wire is cut and a black and a white wire is fed doen the architrave to the switch. So when you turn thew switch on you complete the circuit between one side of the red live line and the other. To get your timer to work another line has to be fed down from the ceiling. The red wire fits to the white and the black that are in existance and a new black wire from the ceiling is attached to the spare wire. which is now the common return. Hope that is clear explanation. So before you electrocute yourself and set the house on fire call in an electricial to wire it correctly.

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Do you have a volt meter? Make sure the cord is correctly connected. Center wire to center terminal on a three wire cord, red and black on outside and white in the middle on a four wire cord with green to case ground.

brown would be the parking light hot wire
green / white would be the blinker hot wire
black yes ground ,
but according to the schematics , **** this color combination only applies to the left front

the right front should be :
brown would be the parking light hot wire
black ground , and a white / light blue would be the blinker hot wire

do you need the rear colors ?

brown is parking on both left and right rears
black is ground on both
light green / orange left blinker / stop light hot wire
orange / light blue right blinker / stop light hot wire

J5