Archive for EFSedan.com 1987 to 1991 Honda Civic Sedan Owners Club
 


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Bumpysbro

no power door locks

hey guys, got a 89lx here but got a problem. all the locks work manually but with the power door lock switch i get a faint sound from only the driverside but doesnt work and i get nothing from all the other locks. same if i try to use the key on it.


tested the power control unit, get 12v coming in on the main wire, ground i think g401 is good, but yet i get nothing, so my guess is the control unit is bad, took it out checked the solder joints and all are good.


if i probe the yel/red wire that goes to the actuator's from the control unit to ground i get 5.4v.
EF FTW

Mine did the same thing when I got mine. Swap out the control unit. I didn't bother to look at the solder joints, just swapped it with one I grabbed from the junkyard and they worked again. I remember that faint sound coming from behind the driver side door panel.
89civicracer

^^ What he said would be what i would do also.. It'll be easier to find it at a junkyard than trace the issue. Confused
Bumpysbro

fixed the issue! went through the helms manual, tested the unit. tested fine.

yet when i tested the yel/red wire that activates the passenger doors i got nothing, so i went and traced the wire. well where my door hinge thing jacked up, they must of opened the door way too much and ripped the wiring at the door to the body harness,

depin'd the connector, solderd/heat shrinked and works fine now Smile


one thing i noticed though, why did honda make it where i can lock all the doors with the key from the driverside yet i cant unlock all the doors?
89 LX SOHC ZC

Glad to hear you found the problem.
89civicracer

Bumpysbro wrote:

one thing i noticed though, why did honda make it where i can lock all the doors with the key from the driverside yet i cant unlock all the doors?


The car was make in the late 80's, not 90's.... I guess it was not a big feature to have all the doors unlock back then...
Wink

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