Trailer Brake Control Switch
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| I39-8 (SRF) - I39-5 (SRRT) | Always | 2 kΩ to 3.09 kΩ |
| I39-8 (SRF) - I39-16 (SRW1) | Manual trailer brake output slider operated to maximum position (100%) | Below 1 kΩ |
| Manual trailer brake output slider not operated (0%) | 2 kΩ to 3 kΩ | |
| I39-8 (SRF) - I39-14 (SRW2) | Manual trailer brake output slider operated to maximum position (100%) | 2 kΩ to 3 kΩ |
| Manual trailer brake output slider not operated (0%) | Below 1 kΩ | |
| I39-8 (SRF) - I39-15 (SRR) | Always | 12 Ω to 14 Ω |
| I39-4 (GA+) - I39-6 (GND) | GAIN (+) selection button pressed | Below 20 Ω |
| GAIN (+) selection button not pressed | 100 kΩ or higher | |
| I39-7 (GA-) - I39-6 (GND) | GAIN (-) selection button pressed | Below 20 Ω |
| GAIN (-) selection button not pressed | 100 kΩ or higher | |
| I39-3 (TAIL) - I39-1 (ILL-) | Battery positive (+) → I39-3 (TAIL) Battery negative (-) → I39-1 (ILL-) |
Illuminates |