Kia Optima: Check FusesA blade type fuse test taps provided to allow checking the fuse itself without removing if from the fuse box. The fuse is good if the test lamp lights up when one lead is connected to the test taps (one at a time) and the other lead is grounded. (Turn the ignition switch so that the fuse circuit becomes operative)

Checking Cables And Wires
Servicing The Electrical SystemRepair procedures
Operation and Leakage Check
Check all of the following items:
Component
Procedure
Brake Booster (A)
Check brake operation by applying the brakes durin ...
Checking the amount of air conditioner refrigerant and compressor lubricant
When the amount of refrigerant is low, the performance of the air conditioning
is reduced. Overfilling also has a negative influence on the air conditioning system.
Therefore, if abnormal operation ...
Replacement
1.
Disconnect the negative (-) battery
terminal.
2.
Using the screwdriver, remove
the side cover (A).
3.
Loosen the mounting screws and
th ...