Lock Actuator from my Honda CRV

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Discussion Overview

The discussion revolves around testing the functionality of a rear cargo lock actuator from a 2004 Honda CRV. Participants explore methods to determine if the actuator is operational, share experiences with similar issues, and inquire about wiring diagrams and actuator reliability.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Experimental/applied

Main Points Raised

  • One participant seeks to identify which of the five terminals on the actuator can be powered with 12 volts DC to test its functionality.
  • Another suggests back probing or disconnecting connectors to check for voltage when the actuator is engaged.
  • A participant emphasizes the need for a wiring diagram to understand the actuator's connections and suggests obtaining one from auto parts stores or online.
  • There is a discussion about a misunderstanding with a Honda service representative regarding the replacement of the actuator, leading to confusion about whether the actuator was defective.
  • One participant shares their experience of searching for wiring diagrams online and expresses concerns about the reliability of different types of lock actuators.
  • A later reply indicates that the participant successfully tested the actuator and questions the implications of continuous motor operation on internal components.
  • There is curiosity about the control unit that manages the actuator's operation and how it functions during locking and unlocking.

Areas of Agreement / Disagreement

Participants express a range of views on the testing methods and reliability of the actuator, with no consensus on the best approach or the actuator's condition. Some share personal experiences while others seek technical information.

Contextual Notes

Participants mention limitations in accessing wiring diagrams and the potential for miscommunication with service departments. There are unresolved questions about the actuator's internal mechanics and the control unit's functionality.

Who May Find This Useful

Individuals interested in automotive repair, particularly those dealing with lock actuators or similar electrical components in vehicles.

kiki_danc
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I got this honda crv 2004 rear cargo lock actuator accidentally replaced when it was working.. although Honda said it might not be working. So I want to check if it is really working or not. Which of the 5 terminal can move the actuator by suppying with 12 volts DC supply?

I watched a lot of youtube videos, but they are mostly about replacing the actuator.. I want to test it isolated if the arm is still functioning or not.
 

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If you can get to the connectors on the one they installed, back probe or disconnect each connector to see which pins have 12 volts when being actuated.
 
kiki_danc said:
So I want to check if it is really working or not. Which of the 5 terminal can move the actuator by suppying with 12 volts DC supply?
You need the part of the wiring diagram for that vehicle that shows this component. You can buy them at auto parts stores or your local Honda dealer, or you may be able to find the schematic by searching online.
 
kiki_danc said:
rear cargo lock actuator accidentally replaced when it was working.. although Honda said it might not be working.
BTW, did you figure out the problem with your rear door lock? I'm having problems with my rear cargo door on my Jeep Grand Cherokee, and had assumed it was just the actuator/solenoid. But if you've found it can be due to something else, I'd be interested in hearing about it. Thanks.
 
berkeman said:
BTW, did you figure out the problem with your rear door lock? I'm having problems with my rear cargo door on my Jeep Grand Cherokee, and had assumed it was just the actuator/solenoid. But if you've found it can be due to something else, I'd be interested in hearing about it. Thanks.

I remembered I had no problems with the rear cargo lock. But the honda service representative heard me wrong.. I told him to replace my backseat right side.. he thought it was cargo rear.. and replaced the cargo lock. He told me it's not working anyway. So I just want to test if the lock actuator removed is really defective or not.

Many here are mechanical engineers. Maybe they have memorized the pin diagram of this lock actuator? Hope they can tell me which of the 2 powers it because I don't have any access to any wiring diagram.
 
berkeman said:
I did a Google Images search on 2004 Honda CRV Wiring Diagram, and got lots of hits. Have a look through these to see if you see the part of the diagram for the rear lock actuator/solenoid assembly:

https://www.google.com/search?q=200...g-_zdAhXdGTQIHXupCh0Q_AUIDygC&biw=935&bih=619

I'm searching now. Do you think the gun type actuator lock or the one in honda is more reliable? What's the usual lifetime of this? I'm concerned about my lock failing without me knowing because here in our place.. robbers forcibly enter cars during traffic stealing bags or even babies.

See:
 
I called up the honda parts and service department. They didn't know the pin assignments.. so I hooked up a 12 volts adapter and tried the terminals.. well.. the left socket with the two terminal is the one connected to the small motor. And it works.. so the Honda service fooled me by saying it's defective when it's not. I spent $60 for it.. so in order not to get into bad mood. I'll take the opportunity for me to be familiar how the whole system works.

I can't find the exact internal diagram for it but here's something similar:



What i'd like to know is.. if the motor keeps running.. what happens exactly to the small white gear inside? And when you lock and unlock the door... does the door circuitry only gives a momentary power to that actuator and it can forward or reverse the polarity? And what is the name of this control unit?
 

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