SPOTLIGHT wiring . Black red and brown wires

[samuri]

 

1

The attached image  is  a 12v car spotlight 

It was connected  by a red wire and a black wire 

I replaced the bulb but didn't notice the hidden brown wire until a few days later !!!!

 I do not   know if the brown wire was originally attached .

Can I ignore the brown wire?

2

 

The connection on the brown wire is half the size of the black and red connections.

There does not seem to be a connection point for the brown wire.

This spotlight came off another vehicle years ago .

 

3

Maybe the auto  electrician  who originally wired the system  only need a red and black wire to be connected?

 

it's a H2 halogen bulb which costs $31 and difficult to source  so

I am  reluctant to experiment with switching wires. to see what 

does and does not work.

 

4

If I connect it without the brown wire ,will it stuff things up?

 I now have only the red and black wires re-connected. If they are connected  back the front will that cause a problem?

Thanks in advance 

 

[GTSBoy]

You only need the red and the black to make the main lamp work.

Where does the brown wire go? You could look and report on what the other end is connected to. Does it just go to the loom plug? It may have been for the equivalent of a parker globe or a halo, or it could be a "body" earth for the housing of the spotty.

[PranK]

Plug a bulb in and see if you get what you need with just red and black.

I can't see where the brown wire goes. What is it connected to?

See if you can trace the red (and black maybe) into the engine bay and check for a relay or do the wires go straight to the switch?

 

 

[PranK]

EDIT: Ok, I see the brown wire goes outside the housing.

So, 2 more q's - can you find a relay or switch?

And, is there even a terminal to connect the brown to?