Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

1994 Hyundai Excel Base, StandardFACTORY OEM SERVICE PROCEDURE

A/C Switch: Notes

Disconnect ECM connector. Turn ignition switch and A/C switch to ON position. Using a DVOM, measure voltage at ECM connector terminals No. 10 and 18. If battery voltage is present, circuit is okay. If battery voltage is not present, go to appropriate A/C SYSTEM INSPECTION procedure.

NOTE: If after all testing procedures have been completed, system is still inoperative, substitute ECM with known good unit and retest.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready Tools Compare Repair Quote Quote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.