Left front side Master power door switch not working?

Tiny
ROCKASOLO
  • MEMBER
  • 2000 CHEVROLET SILVERADO
  • 200,000 MILES
I have a 2003 Sierra and ended up swapping doors to 2000 doors due to damage. I have tested the switches and have figured all wiring except controlling the right side (passenger side) from the driver side master switch. I have tested the switch tan wire #167 and light blue #166 and I do not get any flow power from either. So, either I have a bad switch or I'm doing something wrong.

Here's how I'm testing, running 12v:
power supply to the green and orange wires. All black wires are grounded. Voltmeter connected to the same ground. Positive voltmeter is connected to the wire that is supposed to be providing power based on the position of the switch. Both up and down wires on the driver side tested good, but not the passenger switch. Does the passenger side switch on the driver side provide ground and not power? That would make sense if there's a relay before the driver side motor and the relay would be the one to supply the power when activated, but I'm just guessing here. Any help would be greatly appreciated.
Wednesday, August 3rd, 2022 AT 10:27 PM

7 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,650 POSTS
Hi,

I'm not completely sure I understand what is happening. Since we are dealing with two different model years, I looked up the wiring schematics for both vehicles.

The first two pics are for the 2003 Sierra. Pics 3 and 4 are for a 2000 Silverado. Just looking at them, they appear a good bit different.

Take a look through them and let me know if they help. Not being there and having two different things being put together to make one is really hard to do without things in front of you. LOL I hope you understand.

Let me know.

Joe

See pics below. Note: I had to cut each schematic in half to make them readable for you. I did overlap them so you can follow from one to the next.
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Thursday, August 4th, 2022 AT 5:36 PM
Tiny
ROCKASOLO
  • MEMBER
  • 4 POSTS
Thank you, yes this is helpful. The reason all these diagrams are needed is to help determine the corresponding from the doors to the wires in the chassis. The color of wires may differ, but the functionality remains the same relatively speaking. I tested my the passenger window from the driver side switch and confirmed my assumption, it is a negative relay trigger. Thank you for all your help, I greatly appreciate it.
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Friday, August 5th, 2022 AT 6:37 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,650 POSTS
Hi,

You are very welcome. I'm glad they are helpful to you. If you have a chance, let me know how things turn out for you. I'm interested in knowing.

Take care,

Joe
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Friday, August 5th, 2022 AT 6:50 PM
Tiny
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Will do.
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Friday, August 5th, 2022 AT 8:31 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,650 POSTS
Hi,

I was thinking about your project and wondering if you have been able to make any progress. I don't mean to be a pain. LOL I'm just interested in knowing.

Take care,

Joe
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Sunday, August 7th, 2022 AT 9:29 PM
Tiny
ROCKASOLO
  • MEMBER
  • 4 POSTS
Yes, I figured it out. Thank you.
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Sunday, August 7th, 2022 AT 11:14 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,650 POSTS
Hi,

You are very welcome. I'm glad to hear you got it working.

Please feel free to come back anytime in the future if you have questions.

Take care,

Joe
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Monday, August 8th, 2022 AT 8:09 PM

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