Electrical and Power Symptom Quick Reference
Use this chart when the failure pattern points to supply voltage, current delivery, or protection hardware instead of signal-chain noise.
| Symptom | Most Likely Cause | First Check |
|---|---|---|
| Battery dead after parking overnight | Parasitic drain | Current draw with key off |
| Lights dim during bass hits | Insufficient power system | Voltage under load |
| Battery warning light | Alternator or battery issue | Charge and load test |
| System loses power at high volume | Voltage dropping below protect threshold | Measure voltage under load |
| Fuse keeps blowing | Short circuit or undersized wire | Find short, then confirm wire and fuse sizing |
| Burning smell from wiring | Wire too small for current or a failing connection | Inspect all connections immediately |