Shubbydog
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I think there is a relay that sends 12v to your lock relays. Worth a check.
… door locks gone crazy
- Thread starter PPV_2018
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Appreciate the input. Definitely crossed my mind that BCM has fried/glitched out somehow. But hopefully not *crossing fingers* .. but in regards to the relays.. Happen to know location & relay#(s)?
My truck didn’t come with an owners manual so i am stuck resorting to google. Google search pulled up this info:
Which is weird as hell.. because i scanned every block and there is only a vague entry for “left doors” .. but there is no entry anywhere for “right doors”.. actually there is no other entry anywhere for ANY other doors.. so the left doors are controlled by fuses/relays but the right doors are not.. lol wtf .. that does not seem right.
Plus #43 under the dash looks like a small fuse from the diagram, def not a relay. There’s a crap ton of relays on the engine fuse block that are either unused or don’t have info available on what they are
It’s possible I’m overlooking. Getting late and tired right now.. but when i looked on another website pretty much the same info came up.
you might want to check the x1 connector passenger side and see if there is corrosion or maybe bad connection in there.
all the pins to door locks on are that connector
all the pins to door locks on are that connector
So i checked that harness and it’s impeccable. I wanted to test each relevant pin with the multimeter but apparently i don’t have a setting low enough to get a proper measurement, or i just don’t know wtf I’m doing (or both) electronics is not my strong point
But to the feel test the pins are secure and tight and so clean looks like it just rolled off the assembly line.. wouldn’t you all agree ??
I also looked at fuse#43 on the driver’s side.. looked OK to me
I am starting to think BCM, or pinched wire somewhere in any of the harnesses..
Orrrr…. What? Other than the current possibilities of:
-Pinched/corroded wire hidden somewhere either in wiring harnesses or battery cables
-BCM issue
What else could it be?
But to the feel test the pins are secure and tight and so clean looks like it just rolled off the assembly line.. wouldn’t you all agree ??
I also looked at fuse#43 on the driver’s side.. looked OK to me
I am starting to think BCM, or pinched wire somewhere in any of the harnesses..
Orrrr…. What? Other than the current possibilities of:
-Pinched/corroded wire hidden somewhere either in wiring harnesses or battery cables
-BCM issue
What else could it be?
Last edited:
Ya, looks clean, figured it might be worth a shot to take a look at anyway.
it looks like its going to take a deeper look, maybe you can take a meter and probe those pins/wires and see if one is guilty
I have no idea what they should ohm out at, maybe @mikez71 has that data or @swathdiver
I would suspect one of them is possibly the cause or will lead you to the cause.
Shubbydog
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#44 in the passenger side fuse box is door window motor. I think that relay is for right side doors and windows. If there is a bad or corroded connection, or bad relay you would get strange issues that happen intermittently. Could even be stuck and when it shakes you get connection in the relay. It would be cheap and easy to replace both side relays and see what happens. Good luck.
It is indeed interesting you say that, because remember in post #24 just above when i said i checked fuse #43 ?
As i had posted previously, online search showed that fuse as left doors. Looking through the upfitter guide that @Doubeleive provided, i now see that it’s just as @Shubbydog mentioned but for the driver’s (left) side window..:
(Left side)
(Right side)
I pulled #43 to inspect it, but i couldn’t see a broken contact so i figured it looks fine.
Got in the truck an hour ago to go up the street and I’m greeted with this message:
wtf it just gets weirder. Guessing that has to do with me pulling #43 earlier.
For clarity: is #43L & #44R a fuse or a relay? Anyways, it’s a weird looking fuse(relay?).. I’ll pull #44 passenger side tomorrow and check it out. If not maybe source two of those and replace them.
mikez71
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Bad driver door module? (switches)
curious to see where this ends up in case the same thing ever happens to mine or the wifes
One thing’s for sure when we get it solved for real it will provide easier troubleshooting & save the next Tahoe/yukon owner a lot of head and heartache . . .
more specifically driver door module meaning the door lock actuator or the actual switch you press to lock & unlock?
When i think about it, if the switch on the side of the door is faulty it could definitely explain all of this foolishness.
Yes, the actual switch is the DDM.
ya easy enough to swap out the switch with a used one, I bought one for the wife's suburban it wasn't that much maybe $35-40 off of ebay
if that's all you want to replace or try, I bought the whole switch on ebay complete
do you have a pic? there’s no other listing on rockauto and i’m not seeing anything that looks like a complete assembly on eBay
swathdiver
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@PPV_2018 Have you put a bi-directional scan tool on this yet?
mikez71
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Nice that you have a separate switch. Integrated on the 07-14's.
You could always remove yours first to test.
If it looks right, and it's listed for your vehicle, it does look like a simple (cheap) part.
Negative. I don’t have access to a bi-directional. I only have an old autel i use for checking cel’s but i never even bothered to hook it up on the ‘hoe . . .
I meant to the exact switch you found, i already used similar search query and came up with the same results, nothing looks different. I see plenty window switch assemblies that are full and complete, but not what I’m looking for. Is your wife’s burb a k2? If not maybe the switch assembly changed . . .
Frick it, i just ordered one. For basically $20 why not, we’re still on the cheap end of the parts cannon. When it comes in I will replace with the new one, see what happens . . .
Yep k2, I think I'm confusing windows switch with door lock switch, I rarely drive hers and my Silverado automatically unlocks when I shut it off so I barely if ever use the door lock switch or I just pull the handle twice
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