2004 Mitsubishi Galant Power Locks Not Working

LUBOVKRASEVEAY

MEMBER
2004 MITSUBISHI GALANT
4 CYL
2WD
AUTOMATIC
75,103 MILES

After Market Alarm installed.

Power locks do not work on car. Power unlock button on driver's side does not open doors and does not click.

Inserting the key in the driver's side only opens the driver's side door, none of the others.

Keyless entry did not unlock or lock doors.

Doors do not lock when driving like they used to.

Had an alarm system installed (after door locks were already inoperable) thinking that would fix the problem. It does not. The power windows work on all four windows from all four windows.

The guy that installed it said the wiring all looked intact and connected properly.

Not sure if it is the "switch", fuse or an actuator.

How can I determine which it is, and which fuses would I check?

3 Replies

KHLOW2008

MECHANIC
41,815 POSTS

Hi lubovkraseveay,

I have sent a file regarding the diagnostics to you. Let me know if it is helpful.

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Thursday, July 29th, 2010 AT 12:56 PM

LUBOVKRASEVEAY

MEMBER
2 POSTS

I do have the service manual, but I can't narrow it down without the test equipment.

I think it's either the CDL relay inside the ECM or the Master Control Switch on the driver's side door.

The ECM still operates the lights, horn and other functions of the alarm that are routed the same way (the best I can tell)-so I don't think the ECM it's self is faulty.

I did let my car sit for a year in storage without a battery----do you think the ECM "forgot" the codes or whatever?