1.Turn ignition switch OFF and disconnect the battery negative (-) terminal.
2.Remove the fuse box cover.
3.Remove the starter relay (A).

4.Check for continuity between the terminals (30 and 87) using an ohmmeter.
| Terminal | Resistance | Measure | ||
| 30 - 87 | 1 MΩ or higher | If there is continuity between the terminals, replace the relay. | ||

5.Apply 12V to the terminal 85 and ground to the terminal 86 and then check for continuity between the terminals (30 and 87).
| Terminal | Resistance | Measure | ||
| 30 - 87 | 1Ω or less | If there is no continuity between the terminals, replace the relay. | ||

6.Install the starter relay.
7. Install the fuse box cover.
Starter
Ignition SystemHyundai Tucson (NX4) 2022-2025 Owner's Manual: Light Bulbs
Consult an authorized HYUNDAI dealer
to replace most vehicle light bulbs. It is
difficult to replace vehicle light bulbs
because other parts of the vehicle must
be removed before you can get to the
bulb. This is especially true for removing
the headlight assembly to get to the
bulb(s). ...
Hyundai Tucson (NX4) 2022-2025 Owner's Manual: Highway Driving Assist Settings
Highway Driving Assist
With the ignition switch ON, go to Setup
> Vehicle > Driver Assistance > Driving
Convenience > Highway Driving Assist
(for infotainment system type) from the
Settings menu to turn Highway Driving
Assist on and off.
If Highway Driving Assist is sele ...