No start

2002 CHEVROLET TRAILBLAZER
246,514 MILES • 4WD • AUTOMATIC
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DAULTON93
  • MEMBER
  • 1 POST
The yellow wire that connects to the ignition switch has no power unless I try to start the vehicle. The brown wire has no power as well. What would cause this? Vehicle will not start at all..
May 18, 2020 at 8:31 AM
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ASEMASTER6371
  • Experienced Mechanic
  • 52,796 POSTS
Good evening,

The yellow wire is correct.

The brown wire should have power in the run position. If it does not the ignition switch is bad.

Roy

Ignition and Start Switch Replacement

Tools required
J-42759 Ignition Switch Connector Release Tool

Removal Procedure

1. Disconnect the negative battery cable.

Caution: Refer to SIR Caution in the Preface section.

2. Disable the SIR system.
3. Remove the hush and knee bolster.
4. Remove the steering column trim covers.
5. With the key installed, turn the key to the RUN position.


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6. Install an allen wrench into the hole on top of the lock cylinder housing.

Push down on the allen wrench to release the tab on the lock cylinder inside the lock cylinder housing.


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7. Slide the lock cylinder out of the lock cylinder housing.
8. Disconnect the passlock and key buzzer from the lock cylinder housing.


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9. Insert J-42759 into the lock cylinder housing to release the tabs on the ignition switch.
10. Pull the ignition switch out of the lock cylinder housing.
11. Disconnect the connector from the ignition switch.
May 18, 2020 at 9:52 AM
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Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.