What gauge are the wires on the harness?

The wires on the harness is 20 AWG.

The schematic doesn't show a pull up/pull down resistor. Is a resistor required? If so, what ohm?

This depends upon your application. The LED illumination for the symbol has a built-in dropping resistor, so you can connect the 12V directly across that with no problems. If you're merely turning some piece of equipment on and off, then the switch simply acts as an interrupter - no pull-up required. If you're feeding the input of a microprocessor, such as an Arduino, then you should connect one side of the switch to ground and the other to your input; in this case, you made need a pull-up to 5 volts (*not* 12V!), or you may be able to configure one internally to the micro (an Arduino permits this). If needed, the value isn't critical - anywhere from 1k to 10k will be fine. If you're feeding a PLC input of the "sinking" type, then you'll also need a pull-up, this time to 12 volts; a 4.7k is a good value for this.

instalacion, se beben seguir todos los 4 pasos?

Es opcional, puedes conectar la luz y que quede encendida todo el tiempo, o que prenda solo cuando presionas el boton o mantenerla apagada, en mi caso decidi no utilizar la luz y solo hice las conexiones normales, tierra, corriente y encendido

Installing in a bbq grill have 3 wires, hot /ground/device wire (lights) , help,i would like the led ring on at all times?

Is this for a battery powered igniter? You could just connect the lamp wires to hot and ground, but it will drain your battery. It also won't be very bright. If it's a permanently installed grill with an AC powered igniter, as long as it's 12VDC or less across the hot wire you should be OK. If it's direct to the 120VAC line, you'll have to add a transformer of some sort. You may be able to find an old wall-wart from a broken piece of gear. (Technically, a ballast resistor and diode would work, but I wouldn't recommend it.)

ASIN	B07DFMWH6V
Actuator Type	push button switch
Best Sellers Rank	#21,968 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #52 in Pushbutton Switches
Brand Name	APIELE
Circuit Type	2-way
Color	Silver Shell-Blue
Connectivity Protocol	X-10
Connector Type	Plug In
Contact Material	Silver
Contact Type	Normally Open
Control Method	Touch
Controller Type	Push Button, Ring
Current Rating	5 Amps
Customer Reviews	4.6 4.6 out of 5 stars (844)
Included Components	CONNECTOR
International Protection Rating	IP65
Item Dimensions	1.57 x 1.18 x 0.39 inches
Manufacturer	API Electric
Material Type	Metal
Mounting Type	Panel Mount
Number of Items	1
Number of Positions	2
Operating Voltage	12 Volts
Operation Mode	ON-OFF
Specification Met	RoHS
Switch Type	Push Button
Terminal	Through Hole
UPC	729043884773
Unit Count	1 Count
Upper Temperature Rating	55 Degrees Celsius

19mm Momentary Push Button Switch On Off Stainless Steel with 12V LED Angel Eye Head for 19mm 3/4 Mounting Hole with Wire Socket Plug Self-Reset (Blue)

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