I need help diagnosing power lock issue 96 civic hx
#1
Honda-Tech Member
Thread Starter
I need help diagnosing power lock issue 96 civic hx
To summarize my findings:
Ron has supplied the needed wiring diagrams at the bottom of the page
My door lock control unit was not receiving constant 12v and the unit itself suffered corrosion and dust damage.
my constant 12v supply is being interrupted by a short somewhere in the door harness.
On page 2 I will post pictures of my electrical repair to the oem door lock module
On page 3 if needed I will show how I bypassed the control unit with individual switches and a remote toggle switch
Ron has supplied the needed wiring diagrams at the bottom of the page
My door lock control unit was not receiving constant 12v and the unit itself suffered corrosion and dust damage.
my constant 12v supply is being interrupted by a short somewhere in the door harness.
On page 2 I will post pictures of my electrical repair to the oem door lock module
On page 3 if needed I will show how I bypassed the control unit with individual switches and a remote toggle switch
Last edited by chrysler kid; 09-12-2016 at 12:16 PM.
#3
Honda-Tech Member
Thread Starter
Re: I need help diagnosing power lock issue 96 civic hx
In the below post I show how I wired the factory radio to function primarily as a clock but also to function with the accessories to get keyless eventually working again
The led on the factory radio does not function
And yes the green plug is plugged into the head unit it's just not pictured
Any tip to check voltage at the regulator plug so I can verify the lock module is functional?
#4
Re: I need help diagnosing power lock issue 96 civic hx
Start by pulling aside the rubber boot covering the left and right door jamb connectors to check for broken or damaged wires.
#5
Honda-Tech Member
Thread Starter
#6
Re: I need help diagnosing power lock issue 96 civic hx
You need to pull off the door panel to do some tests from the connectors for the control unit, actuator, and switch.
Start here:
Start here:
#7
Honda-Tech Member
Thread Starter
Re: I need help diagnosing power lock issue 96 civic hx
I transferred a known working switch onto my car with no change in results
Do you know of a way to test the wiring at the actuator? If I can test a plug there for power I can confirm that both actuators are bad
Car has 300k very well maintained miles. It is hard to justify spending the $50 for an actuator when it could be much more complicated than that
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#8
Re: I need help diagnosing power lock issue 96 civic hx
Yes but if both actuators are bad then there is nothing I can test as the trouble shooting process for the lock module is jumping wires from the switch wiring into the module wiring to get the actuator to function.
Do you know of a way to test the wiring at the actuator? If I can test a plug there for power I can confirm that both actuators are bad
Car has 300k very well maintained miles. It is hard to justify spending the $50 for an actuator when it could be much more complicated than that
Do you know of a way to test the wiring at the actuator? If I can test a plug there for power I can confirm that both actuators are bad
Car has 300k very well maintained miles. It is hard to justify spending the $50 for an actuator when it could be much more complicated than that
Afterwards you can run power and ground directly from the battery to test the actuator. You can also test the switch itself.
#9
Re: I need help diagnosing power lock issue 96 civic hx
Here is a different test to try. (If the door lock actuators are bad, this won't do anything; but, if it works, it means the issue is before the power door lock control unit.)
To see if the doors will lock: At the 12-P connector for the power door control unit, attach a spare piece of wire to cavity 1 (where the GRN/WHT wire is). With the connector plugged back in, touch the other end of the spare wire to body ground. Does the doors lock? (Only do this briefly, to not burn out motors if they are good.)
To see if the doors will unlock: At the 12-P connector for the power door control unit, attach a spare wire to cavity 8 (where the GRN/ORN wire is). With the connector plugged back in, touch the other end of the spare wire to body ground. Does the doors unlock?
To see if the doors will lock: At the 12-P connector for the power door control unit, attach a spare piece of wire to cavity 1 (where the GRN/WHT wire is). With the connector plugged back in, touch the other end of the spare wire to body ground. Does the doors lock? (Only do this briefly, to not burn out motors if they are good.)
To see if the doors will unlock: At the 12-P connector for the power door control unit, attach a spare wire to cavity 8 (where the GRN/ORN wire is). With the connector plugged back in, touch the other end of the spare wire to body ground. Does the doors unlock?
#10
Honda-Tech Member
Thread Starter
Re: I need help diagnosing power lock issue 96 civic hx
Looks like wiring was messed up from a new regulator and window motor. These are re spliced back into the harness going to the actuator
I have power to the actuator at 5 volts the rest are ground.
I'm going to have to pull apart the harness on the door for sure now
I have power to the actuator at 5 volts the rest are ground.
I'm going to have to pull apart the harness on the door for sure now
Last edited by chrysler kid; 01-22-2015 at 11:24 AM.
#12
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Thread Starter
Re: I need help diagnosing power lock issue 96 civic hx
Yes, and the door lock module is only getting 9v. I have a feeling they ghetto rigged the window motor. I'm tearing through the electrical tape on the harness and it's getting uglier
#13
#14
Honda-Tech Member
Thread Starter
Re: I need help diagnosing power lock issue 96 civic hx
Correct.
It looks like they jumped the switch so that they could wire the car with an aftermarket alarm and use that keyless Brain.
Need to figure out how the green/orange green/silver connectors go from the switch to the module, then why they also go back to the door
It looks like they jumped the switch so that they could wire the car with an aftermarket alarm and use that keyless Brain.
Need to figure out how the green/orange green/silver connectors go from the switch to the module, then why they also go back to the door
#15
Re: I need help diagnosing power lock issue 96 civic hx
#16
Re: I need help diagnosing power lock issue 96 civic hx
Detailed circuit diagrams and circuit explanations. Almost anything you want to know about the power locks circuit can be found in these diagrams.
#18
#19
Honda-Tech Member
Thread Starter
Re: I need help diagnosing power lock issue 96 civic hx
Blue and yellow wire was tapped at the location of the old aftermarket alarm, just left disconnected leaving an open circuit.
White and green wire was also tapped with a pinch end connector under the dash causing the low voltage
White and green wire was also tapped with a pinch end connector under the dash causing the low voltage
#20
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Thread Starter
Re: I need help diagnosing power lock issue 96 civic hx
Tracking under the dash and the blue yellow wire still does not have power. Going to track it further tonight but I believe I will find the radio control plug tapped as I get towards the rado.
#22
Honda-Tech Member
Thread Starter
Re: I need help diagnosing power lock issue 96 civic hx
It functions so it's not a big issue at the moment. I just hate but style connectors with a passion as well.
There are no local junk yards with civics in them and when I searched for the pinout that Ron posted it was a very common issue to Crack the factory connector I just never found a pinout like he posted.
There are no local junk yards with civics in them and when I searched for the pinout that Ron posted it was a very common issue to Crack the factory connector I just never found a pinout like he posted.
#23
Re: I need help diagnosing power lock issue 96 civic hx
Test the Blu/Yel wire for continuity between the control unit and radio connectors as shown in the control unit input test diagram in post #6.
#24
Honda-Tech Member
Thread Starter
Re: I need help diagnosing power lock issue 96 civic hx
The Blu/Yel wire is only needed for Keyless unlock, so I assume the locks now lock and unlock from the switch on the driver's inside door panel.
Test the Blu/Yel wire for continuity between the control unit and radio connectors as shown in the control unit input test diagram in post #6.
Test the Blu/Yel wire for continuity between the control unit and radio connectors as shown in the control unit input test diagram in post #6.
No function from the actuator with the wires jumped at the box after confirming proper routing through the door panel to the junction at the fuse panel under the kick panel
New actuator will be here in the morning. I just needed to verify wiring before I could conclude the regulator was dead
Last edited by chrysler kid; 01-23-2015 at 06:29 PM.
#25
Honda-Tech Member
Thread Starter
Re: I need help diagnosing power lock issue 96 civic hx
Dammit. Just re installed everything and found the icm plug Un done.re tested and now I get response from the switch like I need, and when I jump the pins everything works.
So that would be the module great
So that would be the module great