How to Troubleshoot the Body Electrical
Tips and Precautions
Before Troubleshooting
Check applicable fuses in the appropriate fuse/relay box.
Check the battery for damage, state of charge, and clean and tight connections.
Do not quick-charge a battery unless the battery ground cable has been disconnected, otherwise you will damage the alternator diodes.
Do not attempt to crank the engine with the battery ground cable loosely connected or you will severely damage the wiring.