Speaker: Description and Operation
SYSTEM OPERATIONName Brand Speaker Relay
Relay is located in the junction block. To test relay refer to the Audio Diagnostic Test Procedures or use a known good relay.
Choke Location:

Choke-Infinity Speakers
If the audio system is lacking bass response, check for continuity across the choke connector. If no continuity Replace choke. The choke is located on the bracket behind the junction block/body control module.