Check for resistance between No. 2 and No. 4 terminals in each switch position.
Courtesy of KIA MOTORS AMERICA, INC. SWITCH TERMINALS SPECIFICATIONS
| Switch name |
Connector terminal |
Resistance (±5%) |
| VOLUME DOWN |
2 - 4 |
6.81 kΩ |
| VOLUME UP |
2 - 4 |
4.61 kΩ |
| MODE |
2 - 4 |
2.11 kΩ |
| SEEK DOWN |
2 - 4 |
1.11 kΩ |
| SEEK UP |
2 - 4 |
430 Ω |