Ignition switch wiring diagram

Tiny
COTTONBALL
  • MEMBER
  • 2002 CHEVROLET IMPALA
  • 3.8L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 130,000 MILES
Someone replaced ignition switch and when they did they disconnected one of the wiring connectors from somewhere in the car than from the ignition switch itself. I cannot locate the other connector. The connector in question has two red wires, two pink wires, a purple wire and an orange wire. All the wires will have power at times. Two have power all the time, two when key is turned to the on position and the others when key is turned to start. Can you tell me where to look for the connector? I have looked but cannot locate.
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Thursday, July 19th, 2018 AT 8:05 PM

9 Replies

Tiny
DL AUTOSHOP
  • MEMBER
Hello, I am Danny.

I was able to find a wiring diagram for the starting circuit including the ignition switch. I have attached the picture and including a link showing how to test electrical circuits. Hope this helps and feel free to ask any other questions if needed. Thanks for using 2CarPros.
Danny-

https://www.2carpros.com/articles/how-to-check-wiring
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Saturday, July 21st, 2018 AT 5:42 AM
Tiny
COTTONBALL
  • MEMBER
Did not answer my question! Needed to know the location of a connector that comes from the ignition switch, I provided a picture of one end. Individual wiring diagram will not help
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Monday, July 23rd, 2018 AT 12:51 PM
Tiny
KEN L
  • ADMIN
Sorry we do not see the picture you uploaded? Here are the ignition switch wiring diagrams and the starter. I am not sure what else you are looking for please reload the images so we can help.

https://www.2carpros.com/articles/how-to-check-wiring

Check out the diagrams (below). Please let us know what happens.

Cheers, Ken
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Monday, July 23rd, 2018 AT 12:57 PM
Tiny
COTTONBALL
  • MEMBER
Here is a picture of the connector that I am having trouble finding where it connects. The other end is connected to the ignition switch. Need approximate location where the other end connects.
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Monday, July 23rd, 2018 AT 2:29 PM
Tiny
COTTONBALL
  • MEMBER
Also, this would seem to be the exiting side off the switch, as in the wires have power when the switch is turned. A couple of wires have power all the time, two more when the key is turned on and then when the key is turned to start the purple and one the other wire has twelve volts.
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Monday, July 23rd, 2018 AT 6:53 PM
Tiny
DL AUTOSHOP
  • MEMBER
Hello again.

Okay, thanks for sending the video. I will do some more research and get back to you. Thanks for being patient.
Danny-
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Tuesday, July 24th, 2018 AT 4:07 AM
Tiny
KEN L
  • ADMIN
Those are mostly power wires so they should plug into another connector which powers the car and starter. Look around up under the dash about the length the wires extend to. Send a video of under the dash so we can look as well.
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Tuesday, July 24th, 2018 AT 10:53 AM
Tiny
REBECCA RAE DEHART
  • MEMBER
Hello, I'm sorry I don't know if I can offer any advice on your problem but I'm hoping you or someone else can help me with mine, I have a 2003 Chevrolet Impala and my ignition switch was cut out. I don't have the old one or any parts to the old one, I bought a new ignition switch and lock cylinder as well as the ignition connecter pigtails. My problem is, there's no old connecter to plug into the new ignition. The wires are hanging out from the dashboard and the wires on the new connectors are all grey. I need to know which colored wires hook to which grey wires (color to letter A-F). If anyone has the same car as me or has access to the information I need I would greatly appreciate it, I ordered a Haynes manual, I have called every junkyard, mechanic shop, etc. Within 100 miles and I've Googled all I can Google, with no luck. My car has been sitting for at least six or seven months. There's absolutely nothing else wrong with the car but with me now six months pregnant with my first child unfortunately my two seat beater truck is not ideal for hauling around a baby, and I really don't want to scrape the car unless it's a last resort. What should I do to fix my car?
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Tuesday, December 29th, 2020 AT 11:26 AM
Tiny
DL AUTOSHOP
  • MEMBER
Hello, I'm Danny.

I've attached picture steps below on how to replace the ignition switch on your car. The last 2 pictures show the wiring diagram for the switch. Here is a tutorial showing how to test wiring:

https://www.2carpros.com/articles/how-to-check-wiring

Let us know if you have any further questions on this issue. Hope this helps and thanks for using 2CarPros.
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Tuesday, December 29th, 2020 AT 5:08 PM

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