Inspection [08/2017 - ]: Procedure
- INSPECT TRAILER BRAKE CONTROL SWITCH
- Measure the resistance according to the value(s) in the table below.
*a Component without harness connected
(Trailer brake control switch)*b GAIN (+) selection button *c GAIN (-) selection button *d Manual trailer brake output slider Standard Resistance
Tester Connection Switch Condition Specified Condition 8 (SRF) -5 (SRRT) - 2 kΩ to 3.09 kΩ 8 (SRF) -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 8 (SRF) -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 8 (SRF) -15 (SRR) - 12 Ω to 14 Ω 4 (GA+) -6 (GND) GAIN (+) selection button pressed Below 20 Ω GAIN (+) selection button not pressed 100 kΩ or higher 4 (GA-) -6 (GND) GAIN (-) selection button pressed Below 20 Ω GAIN (-) selection button not pressed 100 kΩ or higher If the result is not as specified, replace the trailer brake control switch.
- Check that the LED illuminates.
- Apply battery voltage between the terminals of the trailer brake control switch, and check the illumination condition.
OK
Measurement Condition Switch Condition Battery positive (+) →3 (TAIL)
Battery negative (-) → 1 (ILL-)Illuminates If the result is not as specified, replace the trailer brake control switch.
*a Component without harness connected
(Trailer brake control switch)*b Indicator
- Apply battery voltage between the terminals of the trailer brake control switch, and check the illumination condition.
- Measure the resistance according to the value(s) in the table below.