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C4 Electrical System
The electrical system on the C4 generation Corvette® consists of a battery, an alternator, the ignition system, various lamps, several electric motors, an entertainment system, numerous fuses and wiring, various control and monitor modules and a large number of connectors which serve to connect the systems and devices together.
Although there are literally hundreds of individual items involved with the Electrical System, there are some portions of the system that can be checked or serviced rather easily.
Battery
The battery is located in the rear of the engine compartment on the driver's side.  The positive and negative power leads attach to the side of the battery.
If it becomes necessary to replace the battery, a portion of the body must be removed.  Fortunately, this sounds worse than it really is.
First, disconnect the two battery cables from the battery then, looking at the rear of the left front wheel well, you will find four bolts.  Using a #30 Torx bit, remove the top three which hold the fender panel in place.
Next, measure the gap between the fender panel and the driver's side door (while door is closed) so you can reestablish the clearance when you reinstall the fender panel.
Next, remove the 10mm bolt at the top rear of the fender panel which attaches the panel to a support in the engine compartment.
Next, sliding a thin 10mm spanner under the bottom rear of the fender panel, you will be able to loosen the bolt hidden there enough to slide the panel towards you and off of the automobile.
Removal of Battery
You can now remove the 13mm bolt securing the battery hold down and remove the battery.