89 Dodge Dynasty - I replaced factory stereo with new top end unit, the problem...?

Question:
I did not buy a wiring adapter for the cars wiring harness I simply found the wires I needed and spliced into them. The stereo is working fine. The problem that Im having is that now when I turn on my headlights I have no illuminating lights for the dash and climate control. What I have determined is that the illuminating lights for the factory stereo were in series with the previously mentioned lights. I am now stuck as to how I could bypass this and complete the circuit to the dash and climate control illuminating lights. There is an orange wire that was hooked to the factory stereo that I have found to be the Illuminating wire. Could I ground that wire to complete the circuit or would that blow fuses? What I really need is a schematic or someone who has experienced the same problem. I have looked in my chilton repair manual at its schematics and I cannot find anything. Anyone have any good ideas?

Answers:
Check the voltage of the wire with the lights switched on and then switched off. Next, check the voltage of the wire with the lights on and use the dimmer. There is a relay under the dash that controls the lights off of this circuit, and I believe you may have confused the illumination wire with the dimmer wire. The wire you have is an input wire (the factory wiring behind the radio). Simply disconnect this wire from your aftermarket radio and all should work fine. If you're looking to be able to have both, after checking the voltage and the polarity of the wire in the dash, check the owners manual of your aftermarket radio. (Your vehicle, I believe has a + illumination and most radio's are designed to use a -)

Other Answers:
go and spend $10 on the adapter harness.

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