Real world fire alarm troubleshooting on a Bosch combination panel. Here’s a step-by-step of what’s going in this service: 1. Spot the issue at the horn strobe 2. Check voltage and see it’s not right 3. Notice the missing end of line resistor 4. Trace the circuit back to the panel 5. Correct the wiring at the panel 6. Install proper supervision 7. Test and clear the trouble . No guessing. Trace the circuit, fix the termination, test the system. What’s the first thing you check when a notificatio