Join Date: Jan 2011
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There is a website called the12volt.com Itll give you the proper wiring schematics for your column and behind the radio. You need to go over the harness with a fine tooth comb and figure out what is going on. Ive had this happen a couple times with a 4l60-E Once where it even locked the tranny into safety mode (locks the tranny into 3rd gear no 1st 2nd or 4th)
Its usually a simple case of a blown fuse or a wire grounding out somewhere.
For 30 bucks pick up a case of smart fuses. I know you said you checked all of the fuses, but a visual inspection does NOT work on fuses. sometimes they will visually look good and still not work. Smart fuses at least light up when the current isnt passing through them.
Second securely crimp or solder your radio harness back to factory, Next time DONT CHEAP OUT. You have to pay to play, if you want an aftermarket radio, get the proper harness. I have hard wired several in, you wont ever be as happy as if you just shelled out and got the right part. Not to mention changing radios from here on will be a pain, IF you can get it to work.
Third your ignition switch is probably NOT burned out. Again go to the website I told you, find your wiring diagram. If you dont believe me, go to a local parts store pick up a push button ignition switch, (roughly 5-7 bucks) some wire and a few male spades. Wire it up, almost guaranteed your gonna have the same problem.
Fourth, is your fuel pump kicking on? The fuel pump relay on GM vehicles SUCKS. There is a test wire in the engine bay. Again a 6 foot piece of wire with a male spade on one end will plug in here. Short it to the + on the battery there should be an audible CLICK. There should also be an audible WHIRR from the fuel pump. If not replace this relay and try again.
As for your lights. These are attached to the ILLUMINATION wire behind the radio and the fuse in the fuse block. SHOULD NOT stop the car from turning over. Been there done that.