All of my door locks quit at the same time!

chaselee

Member
Joined
May 18, 2016
Messages
315
Reaction score
0
I went to lock my truck yesterday morning and none of my door locks worked. I got home lastnight and checked all fuses and checked the switch with a power probe. Switch is getting power and ground, but they still aren't working. I know anything is possible, but I also know it's highly unlikely for all 4 actuators to go out at the same time. Is there something I'm missing? Any advice appreciated
 

Tiha

Member
Joined
Dec 28, 2020
Messages
86
Reaction score
14
Does the switch on the passenger door still lock or unlock them?

Could just be a bad switch on the driver's door.

I have jumpered them with paper clips to test.
 

chaselee

Member
Joined
May 18, 2016
Messages
315
Reaction score
0
Does the switch on the passenger door still lock or unlock them?

Could just be a bad switch on the driver's door.

I have jumpered them with paper clips to test.
Ha! I did think to try that. I'll see when I get off work.
 

Tiha

Member
Joined
Dec 28, 2020
Messages
86
Reaction score
14
You have to jumper the power and the ground.

Most people just try the power, but since they are motors or solenoids where the polarity reverses you need to jumper both.
 

chaselee

Member
Joined
May 18, 2016
Messages
315
Reaction score
0
You have to jumper the power and the ground.

Most people just try the power, but since they are motors or solenoids where the polarity reverses you need to jumper both.
So if you jumper the two with a wire, what should I be looking for? Thanks
 
Joined
Aug 12, 2011
Messages
429
Reaction score
0
Location
Tehachapi, CA
Here's the wiring diagram for a Crew Cab with no RKE. Also C503 Pinout. Cheers!
 

Attachments

  • 1996 110-002 Power Door Locks (Crew Cab without RKE).pdf
    267.9 KB · Views: 13
  • 1996 C503 Crew Cab Master Door Lock Switch.pdf
    321.5 KB · Views: 12
Last edited:

Tiha

Member
Joined
Dec 28, 2020
Messages
86
Reaction score
14
If you look at the first diagram patrick posted,

If you jumper pink/violet stripe to black/grnd. and Pink/ Light green stripe to Black/ with white stripe they should unlock.
If you get that backwards, then they should try to lock.

If nothing happens, they don't try to lock or unlock then you probably have a broken harness where it passes through the door jamb.
 

chaselee

Member
Joined
May 18, 2016
Messages
315
Reaction score
0
If you look at the first diagram patrick posted,

If you jumper pink/violet stripe to black/grnd. and Pink/ Light green stripe to Black/ with white stripe they should unlock.
If you get that backwards, then they should try to lock.

If nothing happens, they don't try to lock or unlock then you probably have a broken harness where it passes through the door jamb.
Ok thanks
 

chaselee

Member
Joined
May 18, 2016
Messages
315
Reaction score
0
I haven't had time to check it with a jumper because I've been working late every day, but lastnight when I got off, I reached over and hit the passenger side lock button. It would unlock the door, but lock it.
 

97Cajun

New member
Joined
Feb 16, 2022
Messages
3
Reaction score
0
Location
Louisiana
I haven't had time to check it with a jumper because I've been working late every day, but lastnight when I got off, I reached over and hit the passenger side lock button. It would unlock the door, but lock it.
I haven't had time to check it with a jumper because I've been working late every day, but lastnight when I got off, I reached over and hit the passenger side lock button. It would unlock the door, but lock it.
I got my sons working same issue there is a thermal resistor in the actuator motors that gets weak or opens up . I put aluminum foil over the little flat resistor and works just fine. I think it’s there in case switch hangs up. There are some videos on this on the web.
 

Latest posts

Members online

Top