Just got my first Vette -1993 C4. Battery is drawn down after every charge. Door locks, seats, and entry system etc. dont work. Found the fuse to those unplugged. There's a ticking noise under the dash even when the battery is run down. Every other electrical item on the car works and it runs great. Can someone give me a starting point? Do I need a ground fault device to solve this problem?

 

The ticking sound under the dash is probably a relay and is usually the result of a low battery. If you still hear it after the battery is charged, locate it and unplug it and see if this cures the battery drain. If it does, this is the circuit that is draining the battery. Post where the relay is located and members on this forum will identify what it is for and how to troubleshoot the circuit.

Hope this helps.

 

Remove the negative battery cable and charge the battery up. At night look for underhood lights, vanity mirror lights, console light, and the door map light being on. Do you have a radar detector, aftermarket alarm, or radio, or audio amplifier? Check em. Connect an ammeter in series between the battery post and the negative battery cable and start the ammeter out on a scale high enough to not be pinned with the courtesy lights on. When the courtesy lights time out, lower the ammeter full scale and note the leakage current. GM says leakage should be less than 50 milliamps. My 87 measures 27 ma. Pull the courtesy light fuse so you can keep the passenger door open with them off and start pulling fuses one at a time while watching the ammeter. This will locate the circuit with excess leakage. If leakage is not found there, remove the nut on the jump start terminal behind the battery and remove one at a time each of the 8 red wires while watching the ammeter. If no luck, post again telling us what you tried.
Also, in the future, always post what year vette you are asking help for!

The 93 does not have a jump start terminal and I believe has some fuses near the battery. These fuses also need to be removed one at a time to see if leakage current is in those circuits.

 

Had my radio clock stay on all the time in my 87. It killed the battery in two days.

 

Found by removing Fuse "K" the battery draw stopped. This appears to have disabled the seats and possibly some AC/Heater functions. My alternator seized yesterday, so we'll be replacing it this weekend. Didn't find any other lights or accessories that would be on when the car is turned off. Any further suggestions would be helpful!

 

Now you need the electrical diagnosis service manual supplement which has the circuit diagrams and will allow you to know what fuse K powers and isolate the device that is drawing current all the time. Some owners have posted that their seat adjust motors were warm and on all the time due to a bad adjust switch and their batteries discharged in 2 days. I own an 87, so I can't offer any other ideas.