My 2001 z06 ran fine. But after a long trip I parked it for 2 days then got in and turned the key and nothing happened. Radio and lights came on but no crank. Didn’t even feel like starter was even engaging. I asked around and after some advice I replaced the clutch switch, starter and fuses. Still nothing. Now the battery is only 10 months old but I figured let’s check that too. Its showing only 11 amps. Is there anything that could cause the battery to drain like that after only a couple days?

 

If you know how to pull the "codes" from the DIC that may give you some initial direction. Doing this should ALWAYS be the first step in the "diagnostic process" !!...First off when the car didn't start did you check the battery voltage ??...fully charged battery is 12.66 volts. Also does your "security" light go out when the key is inserted into the switch ??...if it stays on the car will not crank...if that's the case clean the ignition switch or try another key. If security light is out and battery is LOW charge it up and then recheck it after an hour or so...see what the battery voltage now reads...you said your battery shows "11 Amps" ????..do you mean MILLIAMPS ??...Amps is a measure of current flow...how did you see this 11 amps ??....if your battery voltage drops from 12.6 volts down to 11 volts after an hour let's say you have a "parasitic drain"...I don't know what your "skill set" is and if you have a DVOM but you will need this tool to check for a drain...if nothing here is applicable it will be necessary to do some further electrical circuit troubleshooting...now you said you replaced the starter and if so are all the connections tight ??...battery terminals tight ??...sometimes you may have to retrace your steps !!

 

 

After checking that, ignition switch. Common.

 

I had something very similar just happen. I replaced the theft deterrent relay and it worked.

When you turn the key in the ignition you should hear a click in the passenger footwell. Do you hear that?

https://www.corvetteforum.com/forums...n-t-start.html

 

Moved to C5 Tech.

 

The theft deterrent relay is the first thing you should check after insuring the battery is fully charged, cable connections are clean and tight at the battery and starter solenoid. The positive side of the TDR coil is powered by 12 volts from the battery and provided to the ignition switch which routes the 12 volts to the park/neutral switch if your car is an auto, or to the clutch safety switch if its a standard or M6 car. The other side of the TDR coil is provided a ground by the BCM if everything is OK with the VATS or vehicle anti theft system. The contacts of the TDR send battery power to the starter solenoid, so it helps to troubleshoot if you know if the TDR is being energized or not, of course you can jumper the heavy gauge red and violet wires at the TDR socket and see if the starter will engage, word of caution make sure your car is in Park or neutral when you do this as doing this bypasses the safety features.

 

Do you need to disconnect the negative battery cable if you replace the TDR?
Is there a way to test the TDR and clutch safety switch themselves and not whether they get juice?

 

There is no reason to disconnect the negative battery cable when replacing the TDR, make sure the ignition switch is off. If proficient with DMM/multimeter you can disconnect clutch safety switch and perform a continuity check, making sure you have zero ohms when clutch is depressed. The TDR can be removed and 12 volts and ground can be applied to coil, and check for zero ohms across the relay contacts as well.