What are these plugs/wires for?

[BRL]

Originally Posted by 67 twins

...If your truck has been retrofitted with a Voltage meter then this circuit should no longer be hooked up or needed.

I just wanted to take a second to let you people know how much I appreciate this forum.

I have both the plugs and fuses and I had no idea what they did so I left the wire connected forever even though I installed a voltmeter long ago.

Good job you guys!