Led pod wiring harness questions

Electricians!:

I am trying to wire up a rear led pod for a bed light. I have lost the switch the wiring harness came with (didn't like the style anyhow), and had bought a replacement toggle switch. I hadn't realized that the switch I bought had only 2 prongs not 3.

My questions are:

Why does the harness need 3 wires on the switch? What do they each do for the relay/light?

Can I use the 2 prong toggle switch I already bought somehow?

And if not does someone know of a 3 prong toggle that looks like this and will fit in a drilled out blank like the ones to the left of the steering wheel. That is where I had retrofitted the switch I have already bought.

Thanks!

 

Putting this back on the front page after 9 min. Because I don't want to start electrical fires​

 

'cause the switch that came with the harness has
1: A fused power source to the switch.
2: Actuation power back to the relay from the switch.
3: Ground. For the switch light.

 

What color wires does the harness have? White, Blue and Black?

 

Red w/ inline fuse and white from the relay, and a black that is grounded to chassis.

 

So connect the red to one side of switch and the white to the other. Ground not used with your switch. Tape it off in case you change the switch to a lighted one.

 

Got a pic?...seems there's something missing

 

I can take a pic of the relay and other stuff soon. The switch I have is exactly the one in pic in OP.

I tried what you said, and then red got real hot immediately when light turned on and actually started to melt a little.

 

send pic of the relay and wiring to it...both ends of the harness...

 

@caribe makaira

Here is the relay
The small red wire goes from the battery to the switch, no fuse.
The small white wire goes from the relay to the switch.
The larger red wire goes from battery to relay with inline fuse,.
Large white and black wires that go into loom, lead out to the light.
The one large black wire is grounded as seen in 3rd pic.
The third (black wire) for the switch is grounded inside the cab.

This is how I set it up per the diagram that the wiring harness came with.



Apologies for the delayed response, I had to take care of school for a couple days.

 

original switch is came with was 30 amp, so I matched it 30 amps with the new switch as well.

 

You should fuse the small red wire going from battery to switch. Does the switch and wire still get hot?