radio inop after alarm install

Hey I just installed a 791xv with a 530t in my 02 silverado (thanks by the way this sight was a HUGE help). Anyway everything is working fine with a couple exceptions. 1st my check engine light comes on (i'm assuming it's due to the remote start), it clears itself on a few occassions. I havn't had the code read yet I'm doing that after I get off work. The second is that my factory stereo is not working. The display is blank with the flashing red light (can't enter code to unlock). I've run out of ideas on where to look for the problem (also assuming that this has something to do with the factory alarm system). Any help you can offer would be greatly appreciated.

Your check engine light is? Did you power up the white ignition 2 wire? Does the trans shift ok after remote start?

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did not power the white ignition 2 wire (if its the wire I'm thinking of it's about a 16ga wire), trans shifts fine.

Ok. You have to power up the white wire as a second ign ie. Hot in the crank position. Check it with your meter to make sure it is ign 2 some times they will use a dark green instead that should solve your check engine light. On to the radio. Could you clarify... Does it work when you start it with the key? And I tdoes not work when you r/s? Or is it completely inop.?

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thanks on the check eng light. The radio is completly inop. It doesn't matter whether or not I use the key

I do not know about the radio. Does that year truck have a true acc wire behind the radio? If it does maybe the fuse is blown. If it has a databus wire to tell it to turn on I do not know how to help you there.

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Have you checked your fuses?  You may have blown a fuse.

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Do it right the first time

Have checked all fuses, it has an anti-theft feature that has a flashing red light. That light is flashing so I know the radio is getting power (i've also checked with a dmm). I just don't know what would cause the radio to be disabled.

That flashing light will flash even after the radio is removed.  Make sure you check all fuses in all of your fuse boxes.  You have one in the cab and one under the hood.   The blown fuse will not always be the radio fuse.

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Do it right the first time

Remove the radio and use a volt meter to measure the orange and green wire directly next to it for power. The orange wire in the radio plug is battery power. The green wire is for switched ignition. The green wire may or may not be driven by a relay in the dash which is for retained accessory power. If your radio stayed on with the key off until a door was opened, then it has this feature. The relay is controlled by the BCM. Check qll your fuses in both fuse boxes for blown ones. The problem is NOT the radio's theft system. The radio would display LOC if it was.

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sparky

Thanks for all the help. THe ignition wire fixed the check engine problem. All the fuses were ok on the radio but I found a wire that split and barely hanging on by insulation behind the radio. So everything works great now. YAY! Thanks again