Jump to content

Door Lock

jason02

By jason02
in Ask A GM Technician

Recommended Posts

jason02 Enthusiast

jason02

Posted
Posted

I have a 02 Silverado ext cab that the pass side door lock will not lock or unlock by the buttons or by remote, it will lock and unlock manual. Driver side works like it should from both doors.

 

Have tried a lock assembly from a salvage yard, (that was tested and works) the symptoms did not change.

 

I’ve checked for voltage and found almost 12v on the lock side but can’t find the unlock side. Checked the fusses that I could find in the panel by the driver door, swapped relays around in the same panel. Can't find the problem.

 

What I’m I missing?

 

 

 

Thanks

 

Jason

minibike132 Senior Enthusiast

minibike132

Posted
Posted
I have a 02 Silverado ext cab that the pass side door lock will not lock or unlock by the buttons or by remote, it will lock and unlock manual. Driver side works like it should from both doors.

 

Have tried a lock assembly from a salvage yard, (that was tested and works) the symptoms did not change.

 

I've checked for voltage and found almost 12v on the lock side but can't find the unlock side. Checked the fusses that I could find in the panel by the driver door, swapped relays around in the same panel. Can't find the problem.

 

What I'm I missing?

 

 

 

Thanks

 

Jason

 

Hey Jason, what you are missing is how the circuit works. Both sides of the actuator are grounded at all times. When lock is commanded there will be 12volts applied to one side making it move one way. When unlock is commanded there will be 12volts applied to the other side making it move the other way. Where did you find the 12v that you found? Was it with the button being pushed or not. If you take off the door pannel and disconnect the actuator you could put a test lamp with one end on one wire and the other side on the other wire. The light should turn on when you push the button in either direction. If it doesn't then put one end of the lamp on a good ground and put the light on one wire and check for voltage when you push the button in both directions (it should light in one or the other) then do the same thing with the other wire. Let us know which side doesn't light the bulb and we can point you in a direction from there.

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • KARNUT
      What did you do to your "other" car (aka musclecar) today

      By KARNUT · Posted

      I remember watching one of the auctions on TV. It just happened that they had two little red express trucks. My brother bought one new in 1979, still has it. So I hung on to watch them cross. The retro redone example brought more bids and went for more money than the original one did. My brother has redone his 3 times and raced it. He’s now in the process of making more tame for cruising. 
    • Jsdirt
      What did you do to your "other" car (aka musclecar) today

      By Jsdirt · Posted

      I always upgraded the suspension and steering components - bushings and ball joints, and had older cars that I could out-corner ANY modern car with. I used to be able to take my '78 Cutlass on off-ramps at stupid speeds and make the sharp MA corners without even squealing the tires. So much fun. My '72 El Camino must've had work done by the previous owner, since that thing seemed to handle even better than the '78.   I think the suspension & steering on the '72 was much more advanced than the '64, so that probably just made a good system even better.   I'm the same way with vehicles. I hate having to worry about the paint on my '93 W250 Cummins. I'm not used to that, lol.   https://postimg.cc/mzKr55sY
    • Jsdirt
      What did you do to your "other" car (aka musclecar) today

      By Jsdirt · Posted

      BEAUTIFUL!! That a Cutlass F85? Or 442? My side-ID skills are lacking thanks to failing memory, lol. Love that color & year, too!   Yeah I was never big on entering my own stuff, but I always liked seeing what everyone had, the rare models, and what's been modified. That was always fun. These days I have barely enough time to do what needs to be done at home.    Oddly enough, here in MA there are more car shows than ever in history! You'd think up here it would be dead, but it's bigger than EVER!          Took the 940 for its maiden voyage with the carburetor. At first I couldn't get out of the yard! This originally had the "Bosch" system (our other 940 has Regina - single fuel pump in fuel tank, and space-age-looking ignition coil on driver's fender) - that has dual fuel pumps. One in the tank, and one under the center left of the vehicle. I had unplugged the external one thinking I wouldn't need it with the carburetor ... but the way I have the pressure regulator hooked up, 90% of the fuel volume is going back to the fuel tank, so cranked all the way down, the regulator is only supplying a hair above 3.5 PSI to the carb. Turns out the in-tank pump (15 PSI alone, instead of 45) couldn't handle the load. Plugged it back in and went for a rip. Ran great!   Throttle response is always amazing with carburetors. ZERO delay that no FI system can reproduce. Also fires up in half the crank rotations as before. Low end power was DRAMATICALLY improved. There was an ongoing lean issue with the FI that I got tired of figuring out, so this is a MASSIVE improvement! Above 50 MPH on hills it feels SUPER weak, though. This is more than likely due to the timing not being advanced enough by the computer, since it believes there are multiple failures. I can live with that through the winter. Will keep me from passing slowpokes where I shouldn't and getting speeding tickets at least. 😁
    • KARNUT
      What did you do to your "other" car (aka musclecar) today

      By KARNUT · Posted

      I like driver quality. I bought a 64 elcamino a few years ago. All original as it turned out. I didn’t know at the time. I made a low ball offer and got it. Black on black factory air 4 speed. It drove like a school bus. It had been awhile I had forgotten just how bad the old cars drove. So I planned on making it more of a retro ride. I would drive it to work sometimes. My brother liked to build cars, I liked to drive them race them. So he noticed the canister oil filter and open blow by tube. He checked the numbers. All original. 327, 250 hp close 4 speed, posi rear end. I put it on eBay made a tidy profit. I didn’t want the responsibility or headache. My wife already had a pristine collector vehicle. It lives in the climate controlled garage. I really don’t care what it is. I like to feel the sensation of speed. Let someone else have the responsibility. I’m too OCD. It used to drive me crazy. I can appreciate people who like to take the responsibility. I’m glad they do. I’ll look and remember back to those days. I’ll jump in the wife’s Genesis to get gas for her. Get my sensation of speed and be happy for awhile. 
    • Snowcamo
      No high speed fans...

      By Snowcamo · Posted

      2014 silverado work truck 5.3. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...