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  1. #1

    Default Door locks, I hate you!

    So, my door locks work with the alarm remote. This tells me it isn't an actuator on any/all of the doors, since they WILL lock and unlock. However, none of the lock buttons inside the 1999 Suburban will work. The doors still lock and unlock when the ignition is turned on and off, but the buttons don't work at all. It means that I need to completely turn off the truck to get something out of any of the other doors. It's annoying. I thought I checked all the fuses, and I didn't see one that was bad. I went to a junkyard, and they were nice enough to let me try their switch before I paid for it. Nope, a different switch did nothing. Thoughts???
    I like you.

  2. #2
    Sr. Apprentice BoneHead's Avatar
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    Default

    Loose wire?? I wish I had a wiring diagram I could share. Not sure where they go from the switch. There's got to be some kind of box, or relay where the inside switches and the alarm meet to send the signal to the actuators. Not sure where it would be though. At least that's where I would start looking if I were in your shoes.
    1998 K1500 Suburban
    1977 Chevelle Malibu

    "I'm proud to defend your right to be an idiot!" From a friend in the military.

  3. #3

    Default

    Check the relay. Most alarm systems require separate relays to be installed to work, that would explain why they work with the alarm and not the switch.

    1995 Silverado 4x4
    6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
    4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge

    2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors, http://www.gmtruckclub.com/forum/sho...5-GMC-Yukon-XL
    2002 Silverado ext cab 2wd (Sold)
    2003 Yukon XL (Totaled)

  4. #4

    Default

    Quote Originally Posted by Pikey View Post
    Check the relay. Most alarm systems require separate relays to be installed to work, that would explain why they work with the alarm and not the switch.

    Good idea. Any thoughts on where the door lock relay is located? I'll just switch it out and see.
    I like you.

  5. #5

    Default

    I found this:

    The polarity-reversing relay is located under the driver-side dash and is mounted by a push-through keeper to the circular, raised section of the firewall. Put your steering wheel in the highest position, lie on your back with your head under the dash. Then as you (or someone else) activates the door lock switch on the driver door controls, listen and feel until you can "feel" the clicking from the relay. It is a black, relatively flat, component about two inches wide and two inches long and attached to the electrical system by a multi-wire plug.


    1995 Silverado 4x4
    6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
    4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge

    2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors, http://www.gmtruckclub.com/forum/sho...5-GMC-Yukon-XL
    2002 Silverado ext cab 2wd (Sold)
    2003 Yukon XL (Totaled)

  6. #6

    Default

    Did you get it fixed?

    1995 Silverado 4x4
    6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
    4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge

    2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors, http://www.gmtruckclub.com/forum/sho...5-GMC-Yukon-XL
    2002 Silverado ext cab 2wd (Sold)
    2003 Yukon XL (Totaled)

  7. #7

    Default

    I'm not so sure it's the relay. If the locks are working at all, in both directions, then the relay is working fine. The power locks can be a very tricky thing to diagnose. The lock and unlock signals go through the courtesy module and the alarm module. To date, on the 99 pickup, even after tearing apart the entire dash, I have never found this "courtesy module" that so much of the electrical wiring goes through.
    Christopher

    1991 Chevy Suburban 1/2 ton 2WD w/ chevy SBC 350-3/4 ton drivetrain upgrade w/4.10 gears 200K miles
    2005 Saturn ION-2 Stock 265K miles
    1982 Bronco, 1993 Bronco (sold), 1971 M35A2 Deuce and a Half



    There are 10 kinds of people, those who understand binary, and those who dont...

    Remember kids, the only difference between screwing around and science is writing it down- Adam Savage

  8. #8

    Default

    Quote Originally Posted by Crawdaddy View Post
    I'm not so sure it's the relay. If the locks are working at all, in both directions, then the relay is working fine. The power locks can be a very tricky thing to diagnose. The lock and unlock signals go through the courtesy module and the alarm module. To date, on the 99 pickup, even after tearing apart the entire dash, I have never found this "courtesy module" that so much of the electrical wiring goes through.
    You could be correct. the last alarm system I installed in a 97 silverado required an extra set of relays to be installed for the door locks to work from the alarm system. So, stating that he should check the relay, I was referring to the original oem relay not the alarm relays. His alarm could be completely different from the one I installed and I could be way off

    1995 Silverado 4x4
    6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
    4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge

    2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors, http://www.gmtruckclub.com/forum/sho...5-GMC-Yukon-XL
    2002 Silverado ext cab 2wd (Sold)
    2003 Yukon XL (Totaled)

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