Posted on Jun 04, 2009

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Hyundai 2002 sonata,,,, car has power locks.

Hyundai 2002 sonata,,,, car has power locks. Using car key I can unlock all doors simultaneously. But I cannot lock doors using the key. Also paddle switch on drivers side door functions to open all locks but does not lock the doors when paddle switch is pressed to lock them. My guess is that the common line that powers all the locking actuators has become permanently open either by faulty connector, fuse open or common supply wire breakage. Could also be a failure of a relay if such is installed to power the common line. Schematics would be helpful.

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Anonymous

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Posted on Jun 07, 2009

Anonymous

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You are correct in your assumption about a relay... there are two relays. One is for 'LOCKING' the other is for 'UN-LOCKING.' They are both labeled as "LOCK" relays (1 & 2). You can verify if a relay is bad by swapping one with the other. If the problem moves to 'unlocking' the doors, but will NOW LOCK - the relay is bad. If not, further troubleshooting is necessary.
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