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I have a 2008 Titan and I am having starting issues. The battery and alternator are fine.
It will crank but wont turn over. For example, Saturday morning I tried to start it 4-5 times and it would crank and not turn over then a few hours later I tried again and it started fine. Sunday it wouldn't start again cranking but not turning over. A few hours later I jumped it off with another car, as soon as the jumper cables were attached it started right up.
Where do I troubleshoot now? Ignition switch? If so where can I get diagrams for the ignition switch? Thank you!
 

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How old is the battery and have you load tested it? These trucks kill batteries every few years. More than likely your problem before you jump into wiring
 

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^^^^. If the battery's more than a couple years old try dropping in a new one before you do anything. Had similar issues with my wife's car, removed the starter, tried a bunch of stuff, battery was reading good voltage. Replaced the battery it started right up.
 

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If the battery isn't the problem then check the ECU relay. Swap it with the foglight relay for a test.
 

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I have a 2008 Titan and I am having starting issues. The battery and alternator are fine.
It will crank but wont turn over. For example, Saturday morning I tried to start it 4-5 times and it would crank and not turn over then a few hours later I tried again and it started fine. Sunday it wouldn't start again cranking but not turning over. A few hours later I jumped it off with another car, as soon as the jumper cables were attached it started right up.
Where do I troubleshoot now? Ignition switch? If so where can I get diagrams for the ignition switch? Thank you!
I had the same problem. I think it is in the chip that is in the key.
I hit lock unlock again and it started right up. Hope this helps.
 
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