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) 2022-2026 Service Manual: Components and Components Location
- Components (1)
With Smart Key
Connector Pin Information
NoConnector AConnector BConnector CConnector D
1Speed_input-ECU groundBlower motor operate_output
2-Rear washer switch_outputpower ground-
3Front washer switch_inputESCL (+)_outputBattery (+) ECU-
4PDW-R power_inputESCL (-)_output ...
Hyundai Tucson (NX4) 2022-2026 Owner's Manual: If You Decide to Pull a Trailer
Consider using a sway control. You
can ask a trailer hitch dealer about
sway control.
Hyundai recommends that you do
not tow with your vehicle for the first
1,200 miles (2,000 km) to allow the
engine to properly break in.
Do not exceed 65 mph (104 km/h)
or the posted towing ...