Check for resistance between No. 3 and No. 4 terminals in each switch position.
Courtesy of HYUNDAI MOTOR CO. SWITCH CONNECTOR REFERENCE CHART
| Switch |
Connector terminal |
Resistance (±5%) |
| Volume Up |
3-4 |
0.17 kΩ |
| Volume Down |
3-4 |
0.41 kΩ |
| Seek Up |
3-4 |
0.77 Ω |
| Seek Down |
3-4 |
1.37 kΩ |
| Mode |
3-4 |
2.64 kΩ |
| Hand free |
3-4 |
6.76 kΩ |