How to Troubleshoot the Electrical System in a Chevy Impalaby Contributor
Chevy boasts a new simplified electrical system for its sedan, the Impala. With fewer parts and wires, Chevy believes the Impala has a more reliable electrical system. Still, Impala owners can expect the occasional glitch. If you own a 2001 or 2002 model, these were bad years for the Impala electrical system.
Check whether your Impala has a Class II electrical system. If so, expect it to check out all the systems every two seconds. If something out of the ordinary turns up, the system will either flash you a message on your instrument panel or store the information for later retrieval by a technician.
Get your battery checked if courtesy lights, audio or air conditioning stops working. The Impala's Battery Rundown Protections starts shutting down low level components if it senses that the battery has a problem holding a charge.
Exchange the turn signal switch with the emergency flasher switch if turn signals work only occasionally. If you have a 2001 Impala, check with GM to see if there's a recall on your turn signal switch. If so, you should be eligible for a free replacement.
Try to jump your non-working turn signals by pushing the emergency flasher button. If this makes the turn signals work again, then it's the emergency flasher switch that needs replacing. Remove the dash and disconnect the wires from the back of the flasher switch. Insert a new one and reattach wires.
Look for 12-volts that feed the fuse panel to repair speedometers that have stopped working.
Replace burned out bulbs with the same type of bulb. If interior car lights blink or dim without warning, you (or a mechanic) may have replaced a light with an incompatible bulb.