I cant use the switch to unlock the doors?

1999 HONDA CIVIC
106,455 MILES • 1.6L • 4 CYL • 2WD • MANUAL
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BROBRIAN99
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I have the car listed above (SI model) comes with power locks. I can use the switch to unlock the doors but I can't lock them. I recently put a alarm system and the remote works to unlock but I can't use it to lock it.
Dec 11, 2019 at 11:58 AM
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STRAILER
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Hello,

It sounds like the alarm is no good or you have it wiring incorrectly. here is a guide to help you check for power and the door lock wiring diagrams so you can see what to check and how the system works:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
Oct 28, 2020 at 11:41 AM
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MFERNA14
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Electrical problem
1999 Honda Civic 4 cyl Two Wheel Drive Automatic 220K miles

Hi there,

Would a failing driver's door actuator cause the other doors to not lock/unlock, or are most likely all 4 door hosed up? Could you please inform me about this as only my car drivers's side lock/unlock is working.... I checked the switch and then the Door Lock Control unit... Both are working fine. Checked them in my friend's car of the same model and type. I see the fuse are fine and Wiring seems to be ok.... Can I check that the wring and actuator of the other 3 door are ok from the harness of the door control device. What can be the problem??? I appreciate any answer and if possble could you please email me just the doors cirucit diagram.
Jan 21, 2021 at 12:57 PM (Merged)
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KHLOW2008
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Hi mferna14, Here you are.


https://www.2carpros.com/forum/automotive_pictures/192750_PowerLock99Civic01a_1.jpg


https://www.2carpros.com/forum/automotive_pictures/192750_PowerLock99Civic01b_1.jpg

Jan 21, 2021 at 12:57 PM (Merged)
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MFERNA14
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Jan 21, 2021 at 12:57 PM (Merged)
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KHLOW2008
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The driver's door lock actuator can be used for locking but not unlocking the other doors.

From the diagram you can see that if the lock is faulty, it would not provide power supply to the driver's door lock switch so it can cause the other 3 doors not top lock or unlock.
Jan 21, 2021 at 12:57 PM (Merged)
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MFERNA14
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Thank you very much for the feedback and the answer, I realy appreciate your help and hope to get the door working.... I will go according to the diagram which will really help and hope to tell you that all my door are working once again..... Thanks a million and what a good & hellpful web site you guys have

MF
Jan 21, 2021 at 12:57 PM (Merged)
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KHLOW2008
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You are welcomed and thank you for the compliments.

Feel free to drop by anytime you got any questions.

Hope you get the problem solved.
Jan 21, 2021 at 12:57 PM (Merged)
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SUKALSR
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Electrical problem
1998 Honda Civic 4 cyl Two Wheel Drive Automatic

power lock will not work on any door. fuse under hood is good. ck door lock control from my other honda stll no good i do not have a remoe entey please help
stan
Jan 21, 2021 at 12:57 PM (Merged)
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BUDDYCRAIGG
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If you don't get any movement when trying to lock, or unlock then I suspect the problem is going to be in the switch built onto the drivers door lock motor.

Unplug the 4 wire connector at the motor and then try the master switch in both directions to see if you get any movement.
Jan 21, 2021 at 12:57 PM (Merged)
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SUKALSR
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[quote:f9a23c1f5e="buddycraigg"]If you don't get any movement when trying to lock, or unlock then I suspect the problem is going to be in the switch built onto the drivers door lock motor.

Unplug the 4 wire connector at the motor and then try the master switch in both directions to see if you get any movement.[/quote:f9a23c1f5e]

removerd the wire to drivers door no responce also tryed master switch from my other car still no respose switch worked on the other car.
Jan 21, 2021 at 12:57 PM (Merged)
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SUKALSR
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did more ck and found there was no ground jumped blk wire to ground and it started working
Jan 21, 2021 at 12:57 PM (Merged)
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BUDDYCRAIGG
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[quote:7d760d50f5="sukalsr"]did more ck and found there was no ground [/quote:7d760d50f5]Yeah, that can do it.

Glad it was a cheap fix.
Jan 21, 2021 at 12:57 PM (Merged)
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AUSTINMARTIN
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My power door locks dont work and my windows a very slow what is wrong
Jan 21, 2021 at 12:57 PM (Merged)
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KHLOW2008
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Power locks could be a fault with the control unit, lock actuator, a blown fuse or a wiring problem.

The slow window movement could be due to a weak motor or the runchannels are bad restricting movement. With windows down, spray some silicone lubricants or tire restorer ( or equivalent but DO NOT use WD40 or any oil based sprays). Move the glass up and down a few times and retest.
Jan 21, 2021 at 12:57 PM (Merged)
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AUSTINMARTIN
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The fuses are all good how do i test the control unit?
Jan 21, 2021 at 12:57 PM (Merged)
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KHLOW2008
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Is system equipped with keyless entry?
When driver's door lock switch is activated, is there any indication of any movements or noises?
Jan 21, 2021 at 12:57 PM (Merged)
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AUSTINMARTIN
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No the car is not equipped with keyless entry and there is no noise or movements when the switch is activated
Jan 21, 2021 at 12:57 PM (Merged)
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KHLOW2008
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Remove left door panel. Using a DVOM, perform power door lock unit input tests. See Fig. 5 . If all input test results are okay, inspect connector and terminals for damage and proper fit. If connector is okay and power door lock still malfunctions, replace power door lock control unit.

Jan 21, 2021 at 12:57 PM (Merged)
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MOHAWK204
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My 1999 Honda Civic LX has electrical issues I cannot explain. The locks stopped working a few months ago, and recently the headlights randomly flash the brights. My stereo has also been cutting out on the front with no explanation as to why. All of this may be connected to my encounter with a deep puddle, that initially flooded the distributor and air filter. The engine has been working OK, but I am baffled as to how seemingly different electrical systems could be malfunctioning. I have checked the fuses- they all tested OK. Could a group of wires be short-circuiting? Am I missing something?Austin
Jan 21, 2021 at 12:58 PM (Merged)
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HMAC300
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check your grounds, there are afew that are low on tehframe in engien copartment and if you flooded dist they may be mesed up. also clean teh trerminals of your battery and bat to engine bat to body.
Jan 21, 2021 at 12:58 PM (Merged)
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GOLDMATT
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Electrical problem
1999 Honda Civic Two Wheel Drive

I have notice others with the same problem as me. The automatic door locks dont work any more. I have heard it could be the auctuater or the control module. Has any one heard about having to reprogram the computer to get them working again?
And how do I determine what is the problem without spending a ton of money? Would it have any connection with upgrading the stereo?
Jan 21, 2021 at 12:59 PM (Merged)
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KHLOW2008
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Hi goldmatt,

For some models the door locks would be affected if the radio is replaced as it is interconnected. For fob programmming, the radio has a valet switch that is required.

Does manual locking of the driver door operates the door locks?

If you have a blown underdash # 51 (20 A) fuse, the central locking system would not operate.
Jan 21, 2021 at 12:59 PM (Merged)
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CHOCO2000
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The power locks on my '98 Honda Civic work only on the driver's side door, the remaining 3 doors dont show any response. What could be the problem?
Jan 21, 2021 at 12:59 PM (Merged)
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KHLOW2008
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Hi choco2000,

Check for a disconnected coupler at the door pillar.

It most probably is open circuit in power supply to the three doors which are linked.
Jan 21, 2021 at 12:59 PM (Merged)
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CHOCO2000
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Thanks for your reply, your answers sounds like the correct one. I checked it when I got a chance, the wires seem to be tight and intact. Since it's a big coupling with lot of wires and it's short in length it was really hard to check them in detail. Do you know a way to check couplings like this? Can you suggest a way to proceed once I have the couplings separated?
Jan 21, 2021 at 12:59 PM (Merged)
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KHLOW2008
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Hi choco2000,

Find the control unit first, I have forgotten if it is in the door panel or under dash.

If it is located in the door, check the output wires to the other doors for power when activating the central lock.

Note their color and trace them to where there might be any connectors and check tham again.

It is possible the wire is broken between the door and pillar as opening and closing the door over time could have broken them over time.
Jan 21, 2021 at 12:59 PM (Merged)
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CHOCO2000
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Thanks a lot. The control unit is in the door panel. I'll check it like you said and I'll let you know what happened. Thanks :)
Jan 21, 2021 at 12:59 PM (Merged)