GM Truck Club
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 9 of 9
  1. #1

    Default Question about power door lock switch .....

    1988 Silverado, neither power door lock switch works. All power window switches work fine and locking the doors is not a problem. Any ideas on what might be going on? I've checked the fuse panel... all good. Had door panels off to install new window felts, wiring looks good... connections solid. Thanks for any input!
    Last edited by Terry Hooks; 07-30-2012 at 01:32 PM.
    ~1988 Silverado 4X4 5.7
    56,xxx original miles
    Factory speakers replaced with Rockford Fosgate
    Upgraded Sony stereo All factory speakers replaced w/ Rockford Fosgate speakers
    Rockford Fosgate 10" sub/ amp combo behind seat
    ~2001 Blazer 4x4 4.3
    K&N cold air intake, APC reverse glow gauges
    all factory speakers replaced w/ Rockford Fosgate
    2 12" RF subs in a RF ported box

  2. #2


    Any thoughts......anyone??

  3. #3


    The lock actuators? They went in both of my rear doors in my 96 suburban.
    00 Chevy Tahoe LT, 5.3 4x4

  4. #4


    Could be the switches themselves that went out.

    I thought that 88s had a relay for the locks but I could be wrong.

    If at first you don't succeed, get a bigger cheater bar.

    1999 GMC Sierra SLT Z71 | 5.3 "Vortec" | Spectre "Cold Air Intake" | TransDapt TBS | Hypertech 30005 Tune | 2005 Chevy Tail Lights | Denali headlights | Grill Mounted Fog Lights | AWS Bug Shield | 265/70/16 Futura Scramblers | Boss HD Speakers | 2005 Overhead Console | Flowmaster Super 40 mufflers 2N1O | Mostly stock-ish
    Bigger Amp Alternator | Electric Fans | Transmission Fluid cooler | Paint (Halfway there)| Interior Restoration/Upgrade with newer model parts | Window Visors (In channel) | Tint | Low-Profile Tool Box | LEDs throughout stock cab locations (68% Done) | And whatever is spurr of the moment
    CVN-69 "IKE-ATRAZ" AIR/V-2 Gear Dawgs

  5. #5


    Quote Originally Posted by rileyjr16 View Post
    Could be the switches themselves that went out.

    I thought that 88s had a relay for the locks but I could be wrong.
    I just read online that the 88's door lock switches are wired up in a way that when one switch goes bad, neither will work. I've ordered 2 new switches, gonna see what replacing them does. ( one at a time so maybe I can prove or disprove this) Thanks for the input guys!

  6. #6


    Passenger side switch was the culprit. Replaced and everything is back to normal. The switches are wired in a series circuit, thus when one goes out..... neither will work. (same principle as most Christmas lights)

  7. #7


    That's useful info to know in advance of such a problem. I'm glad you got it sussed out!

  8. #8


    Glad to know you got it fixed. Those older trucks could be a pain in trying to figure out electrical stuff.

  9. #9


    My '01 is wired the same way. This past December I installed new speakers all through my truck. If i had the power window/lock cluster unplugged from one door, the other door wouldn't work at all.
    Clint (TX) 2001 Silverado LS 4.8L auto 2wd ECSB [GARAGE]
    Gasoline or gunpowder: If you ain't burning one, you ain't having fun!
    NRA Endowment Member 5 24 48 88 - Hendrick Motorsports FTW!

Similar Threads

  1. Replies: 0
    Last: 01-04-2012, 06:40 PM
  2. Replies: 0
    Last: 12-18-2011, 01:40 PM
  3. Power door lock/lumbar/rear door speaker electrical gremlin
    By alchemist1 in forum Chevy Suburban Forum (GMC Yukon XL)
    Replies: 11
    Last: 11-07-2011, 06:15 PM
  4. programming new lt frt door lock/power window switch.
    By Tim Josey in forum Chevy SUV & Crossover Tech Forum
    Replies: 0
    Last: 12-28-2010, 01:05 PM
  5. Touble with power door lock switch
    By JoeeD in forum General Chevy & GM Tech Questions
    Replies: 0
    Last: 05-05-2009, 10:37 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts