Rear doors lock, but won't unlock.

by **SaltWaterDrinker** » Mon Sep 09, 2013 6:09 am

While getting ready for a huge road trip I discovered that my rear doors lock, but they do not unlock. The front doors work fine. What would be causing this?

by **Moots1288** » Mon Sep 09, 2013 7:17 am

Did you try locking from the passenger door?

by **navigator** » Mon Sep 09, 2013 8:02 am

the driver door switch is a common failure item (unsure which years).
The dealer just replaced mine for free.

by **dvanbramer88** » Mon Sep 09, 2013 9:30 am

Va isn't a huge road trip....

Just saying.

by **RyansTBLS** » Mon Sep 09, 2013 1:07 pm

you should of gotten a recall for your doorlocks from GM, if you've done that, check and make certain you didn't engage the child safety locks, not sure how they open once engaged.... :scratch:

by **navigator** » Mon Sep 09, 2013 1:43 pm

with the child safety locks, the locks work normally, the inside handles just don't work.

MY Youtube Channel · by **TBYODA** » Mon Sep 09, 2013 1:48 pm

RyansTBLS wrote:you should of gotten a recall for your doorlocks from GM, if you've done that, check and make certain you didn't engage the child safety locks, not sure how they open once engaged....

That would not effect the power locks, those only prevent manual opening from the inside when engaged you can only open doors from outside. Try unlock/lock the rear from there switches. See if that works. On my chevy s10 blazer work truck every once I awhile the front passenger windows will not go up from the driver door unless I press the passenger switch down or up. Then it is fine for a few months.

by **djthumper** » Mon Sep 09, 2013 1:53 pm

RyansTBLS wrote:you should of gotten a recall for your doorlocks from GM, if you've done that, check and make certain you didn't engage the child safety locks, not sure how they open once engaged....

The recall was for the master panel on the driver's door.

by **SaltWaterDrinker** » Mon Sep 09, 2013 3:50 pm

dvanbramer88 wrote:Va isn't a huge road trip....

Just saying.

In my world and with my truck, it is - especially because each trip come with a massive dosage of stress and anxiety because it'll either make or break my future down there.

Thanks though.
:hijack:

---
This is when I use the Key FOB (remote). They lock just fine, but do not unlock. The control panel does not work either. Regarding that - I am a 2003 - would I be part of that recall?

by **RyansTBLS** » Mon Sep 09, 2013 4:02 pm

So when you push lock, they get the signal but won't unlock via fob, driver panel, or passenger panel? Do you have any way of unlocking them?

by **SaltWaterDrinker** » Mon Sep 09, 2013 4:17 pm

RyansTBLS wrote:So when you push lock, they get the signal but won't unlock via fob, driver panel, or passenger panel? Do you have any way of unlocking them?

I don't even think they get the signal. I don't hear anything clicking inside. Could I have severed a wire somewhere along the pilar that divides the front and rear?

I could reach back and so it but that defeats the purpose...lol

by **dvanbramer88** » Mon Sep 09, 2013 4:50 pm

SaltWaterDrinker wrote:
dvanbramer88 wrote:Va isn't a huge road trip....

Just saying.

In my world and with my truck, it is - especially because each trip come with a massive dosage of stress and anxiety because it'll either make or break my future down there.

Thanks though.

For you, the meaning of the trip is big. I get that. But the distance/time ain't so much.

Back on topic :happy whip:

YouTube Videos · by **Trail X** » Tue Sep 10, 2013 3:32 pm

Sounds like someone needs to break out a wiring schematic.

by **WaltV** » Sun Oct 06, 2013 11:37 pm

There are two related relays in the rear fuse block under the back seat. One is the rear 'Lock' relay. The other is the rear 'Unlock' relay. Find them and swap them. If they unlock, but don't lock after. Get a relay. Otherwise some circuit testing will be necessary.

by **WaltV** » Sun Oct 06, 2013 11:44 pm

I can't post a fuse block diagram from my phone, but the attachment should be the schematic.

by **v7guy** » Mon Oct 07, 2013 12:40 am

The new guy Walt, bringing the tech,I like it.

by **WaltV** » Mon Oct 07, 2013 9:24 am

Oh yeah! Good tech info is priceless! :excited:

by **SaltWaterDrinker** » Wed Oct 09, 2013 10:34 am

Squared away Walt! I don't know what I did but toying in the fuse box did something.

MY Youtube Channel · by **TBYODA** » Wed Oct 09, 2013 6:19 pm

SaltWaterDrinker wrote:Squared away Walt! I don't know what I did but toying in the fuse box did something.

loose or corroded connection, get yourself some dielectric grease. Could still be one of the relays internal contacts. Look for white residue could be salt.

by **WaltV** » Sat Oct 12, 2013 12:09 am

TBYODA wrote:loose or corroded connection, get yourself some dielectric grease. Could still be one of the relays internal contacts. Look for white residue could be salt.

If you have a problem with the rear locks only, it is usually a relay issue or freaking 'terminal fretting'. Always unplug grease and reset shit.

Man as far as salt goes. I hate that stuff, unless its on my steak. I feel sorry for all you guys in snow and near the beach.

Offroad Trailblazers and Envoys

Rear doors lock, but won't unlock.

Rear doors lock, but won't unlock.

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