Door Lock Problems - Actuator or Relay?
 

I have a 1998 Corvette. The passenger side door lock locks properly, but does not unlock when using the fob or pressing the door button. I am guessing that I need to replace the door lock actuator, but reading the forum it seems that relays are a common problem. I do not hear the faint clicking noise that others are describing with relay problems, so I still think it might be the actuator. The door locks every time, but it does not unlock. What do you guys think? Is it a bad actuator or bad relay? Thanks for your help. I have to remove the door panel to fix a floppy mirror problem, so now is the time to fix the door lock.:confused2:

The relay is most common. A dealer would just replace the whole module but Bakersfield's thread is the best How To out there.

I have to ask.

Are you presssing the unlock button twice? Also insert your key into the drivers door and unlock it, then turn the key again to unlock the pass door. If it won't unlock in either of these two ways it's something with your door switch. IMO

Someone else may have your answer on that.

Edit I see now it doesn't unlock when pressing the unlock button inside either. Sorry for wasting your time!

You could swap the modules, if it doesn't work then it could be actuator....

Going to try to replace middle relay
 

DeeGee,

I think I will try to replace the relay myself. I am guessing the the middle relay that unlocks is bad. The lock does unlock sometimes (maybe once every 30 times the button is pushed). Do you happen to have a copy of Bakerfield's post?

02KoolC5,

Trying to use the driver's door module to test the passenger side door module is a great idea. However, I don't want to remove the driver's door panel unless I have to.

Does anyone know a good place to buy door lock relays? Are the quality of some relays better than others?

I got the JSM1-12V-5 from digi-key. Ordered 5 and only have 2 left. These are good to have around. :thumbs:

PM me with your e mail and I'll send it on:thumbs:

Relays ordered
 

Thanks Chris. I just ordered 5 relays. :thumbs:

yea I didn't do the swap myself for that reason but thought I'd throw it out there here is the how to I used and the vetteessentials.com for panel removeal good luck:cheers:

http://www.ronjpics.com/Corvettestuff.htm

I think quality is about the same I also got mine from digikey

Thanks for the reference # Chris. My door lock module is starting to go bad again. I checked and I found a supplier for that relay here in England. Looks like I have a job to do.

Update - Problem Fixed!
 

I was able to remove the old relay and solder a new one onto the circuit board. The unlock relay is the middle one, and I had a heck of a time getting it out. I was using a 15 watt soldering iron, but bought a 40 watt one to get more heat. I have very little soldering/desoldering experience, so I watched I few youtube videos on the subject. I finally got the relay removed, and soldering the new one on was a little easier. I still had trouble getting the solder out of the holes of the circuit board so that I could install the new one. I tried using the copper ribbon and a vacuum tool, but that solder was still hard to remove. I ended up heating each area and pushing the relay to get it installed. Once in position, I soldered each of the five pins.

I plugged the repaired door module back in, and the unlock button now works! It was a bad relay after all. Thanks for all the advice I got on the forum! This saved me a lot of money. I would rather pay $1.67 for a relay than buy an entire door module or replace a perfectly good door lock actuator. If I can do this repair, anyone could! :thumbs:

Great job:thumbs::thumbs::thumbs::thumbs:

My turn next. I have the relays ready to go.

:lurk: Just curious..how did that relay replacement work out for u dee gee? I have the same problem now..thks :ack:

ok; I'll tk your word for it. :thumbs: I am going to try it..mine just went bad the other day..

I've been practicing my soldering skills:D

It hasn't reached the top of the Honeydoo List yet:lol:

A friend here in UK also has the problem so he's going to help out when we get round to it. I have another friend who's an electronics guru so I may invite him along too and make it a door module party.:lol:

Can the same relay be used for the door locks and windows? I thought they were the same but in one of the threads it looks like they are different part numbers.

I thought they were the same. I thought i read that somewhere when i dealt with this prob.

I just had one of the electronic techs at work replace the relays in one of mine. There were 4 relays with 3 different part numbers. I bought them from digi-key last year. You have to open up the module to get the part numbers unless somebody on here has those numbers.

Mine was the unlock relay( JSM1-12V-5 ), $1.50 at digkey as stated above.

Actuator or Relay
 

My driver side door panel lock/unlock buttons will open the door locks, however, to lock the doors (pushing the buttons to lock), nothing.....this been going on for a month...I do not have a FOB, so upon exit I usually hit the "lock" button, hear the actuator, and it use to work....not anymore....
I bought a LCDM off E Bay, $45, rather than spend $80 for all the soldering stuff needed, just installed it, and it did not fix the problem....
Now, if an actuator goes bad, can it still work to open the lock and not function to close or lock the door?....The passenger sides door control work for both (locks and unlocks) so that tells me my actuator is ok, correct?....Now, could there be a wire going bad?...Could I have two bad relays, my box and the new/used box too?...Damn

Received new relays today. installed the two for the door locks, and the same problem, cannot lock the doors from the driver side control, unlock works just as before....Could it be the control unit?

I'm having the same issue, my doors will lock with the fob, but will not unlock. I need to order the relays, however I am not looking forward to doing this, I never cared for taking door panels off and messing with electrical junk on cars, I would rather pull the motor!:ack:

Any chance I can get in on the link/ part numbers???

Driver door unlocks but will not lock and I am not convinced that it is the actuator - although the I puchased on any way.

Thanks

https://www.corvetteforum.com/forums...post1587396862

http://www.digikey.com/product-search/en

In the link pictures the lock relay is the one on the bottom. The middle relay is for unlock.

There is only one actuator motor so we know the actuator is good so it must be an internal issue with the door module. The relay is the most likely cause and it is fairly easy to replace.

I have worked on dozens of door issues and I predict that the relay is your problem.

Let me know if I can help further.

I am a bit confused regarding which relay does what - the middle is supposed to be the unlock from what I have seen and read, but explain to me this...

My driver door would not lock with the fob. Unlock worked perfectly fine, so I replaced the "Lock" relay, reassembled everything and no luck, same issue. Then thinking maybe the actuator was the issue, I also replaced it - again, no luck. Now pulling ideas out of the air, I went ahead and replaced the unlock relay on the board.... wait for it...... Everything now worked.

Help me out here.... Thanks

Can't explain that. Was Murphy helping you?

I'm having the same issues with my C5 lock. Can you send me the thread also ?

Mine is pass. Door have to lock it manually what's the easiest check act or relays

Not the most elegant method, but I know when my relays went bad I could give the door a hard close or smack the door panel to get it to work. Another clue that the relays are going bad is that the door will lock sometimes.

My thought is that if the actuator was bad that the door wouldn't lock or unlock, but if it unlocks then the actuator is good. Not 100% sure on that, though.

Replace the relay. The actuator seems fine if it unlocks. There is just one motor for lock and unlock. Two separate relays for that activity.


Mr. Sam

Thanks everybody for the info will check them out

Ok so I could use alittle help. I bought a 02 z06 couple weeks ago that was neglected. I'm loving the car but these little issues are killing me here. I used this great forum for tips to replace the passenger side window motor and regulator. After I finished that install I tested it and it worked, I was very happy. So while I had the door panel off I figured I would attempt to replace the door lock relays because the door lol didn't work on that side. So I tried it, didn't go so well, I had got a good splatter of solder all over trying to blow the holes clean. Thought I got that all cleaned up, then while cleaning one of the holes out I must have got it to hot and one of the rings that the pins go through came off. So I think I'm F'd here, right? Any way I put it all back together and now the window doesn't work, WTF? I can live without he door locks but I would sure like to use my new power window? Please help

Old thread you brought up but relevant so....
Your best bet is to replace the door module as ther are somewhat cheap.
https://www.ebay.com/sch/i.html?_fro...odule&_sacat=0

Do you know if there is any difference between years or options?