Rear and dash lights stop working

I installed a new head unit. I did it by splicing the old harness (from a old sony HU) and wired a JVC head unit. Now when i pull my knob for my lgihts out, only my front outside lights come one, but if i push the knob in so the dim (running lights) are supposed to be on, my dash lights come on but my running lights dont. So if i fiddle with the knob i can get both the dash and outside lights to come on. Any idea what this is. I checked the fuses for my lgihts, they are fine. I drive a 1989 FOrd Bronco II 4WD. I tried looking at a wiring diagram and its gibberish to me. IM a noob at this. Any help will be greatfull

You say you fiddle with the switch and it works- that points to a bad switch.

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My ex once told me I have a perfect face for radio.

did you hook up your illumination wire?  Disconnect it, if that dosn't fix it, run to the junk yard and grab a used switch.

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2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.

ok, ill unhook the illumination wire. If that doesnt work then ill get me a new switch., thanks for the help

it seems to be the switch, i unhooked the illumination wire and the same thing happened, i also have 2 dimmer wires comming from my harness, should those be connected?

No, your dimmer wires will not be necessary for normal operation.  Some vehicle harnesses have these wires, but few aftermarket radios have a connection for them- only the illumination wire.  Tape them off, replace your switch, and be happy.

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My ex once told me I have a perfect face for radio.