1.There should be continuity between the No.30 and No.87 terminals when power and ground are connected to the No.85 and No.86 terminals.
2.There should be no continuity between the No.30 and No.87 terminals when power is disconnected.



1.Disconnect the negative (-) battery terminal.
2.Push 4 hooks in the engine room relay box out to the arrow direction and put up the PCB block (A).

3.Disconnect the connector and remove the the PCB block (A).
1.Be sure there is no play in the fuse holders, and that the fuses are held securely.
2.Are the fuse capacities for each circuit correct?
3.Are there any blown fuses?
• If a fuse is to be replaced, be sure to use a new fuse of the same capacity. Always determine why the fuse blew first and completely eliminate the problem before installing a new fuse.

• Multi fuse (A) is needed to replace in the mass when it damaged only one fuse.
• Use the multi fuse capacities for each circuit correctly.
Components and Components Location
Relay Box (Passenger Compartment)Hyundai Tucson (NX4) 2022-2026 Service Manual: Repair procedures
- Inspection
Operation and Leakage Check
1.Brake Booster (A)(1)Check brake operation by applying the
brake during the test run. If the brake does not operate properly,
replace the brake booster. If brake fluid remains inside the booster
when disassembled, replace the booster and master ...
Hyundai Tucson (NX4) 2022-2026 Owner's Manual: System Maintenance
Air Conditioning Performance and
Maintenance at Your HYUNDAI
Dealer
If the amount of refrigerant is too low
or too high, the performance of the air
conditioning is reduced. Have the system
be inspected by an authorized HYUNDAI
dealer.
NOTICE
The refrigerant system should only
be ...