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Discussion Starter #1
Ok I’m have a weird problem. My key works fine other than starting the car, I have to start the car by starter relay. I turn accessory’s on first than start it from relay when I try to
Turn over with key it does nothing. Any help tried changing the ignition switch same thing.
 

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2006 Cadillac CTS [] 2008 Cadillac DTS
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My mother's 06 CTS is having the same issue, were taking it into the dealer under a third party warranty, I'll let you know what they diagnose it with. I also replaced the relay, we also noticed if you have the Cadillac emblem on the key face you when starting it has a better chance at starting.
 

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Any news on whats happening to your 06? Im experiencing those issues as well, and i can hear the main relay micro clicking in the fuse box. Relay is fine, it is the power supporting the relay that appears to not have a ground reading. I get a loss of communication code u0100, and a TCM code p0700. These codes may be related. I have plenty of symptoms accompanying these issues, but my circuitry may fix half my issues. Let us know what you find out at dealer please. And give them a punch. Lol
 
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