Marinmcgreevy
Member
- Messages
- 11
- Location
- Mt. Lebanon, PA
Hi All,
thanks to to all of the info on this great forum I was able to diagnose and repair a crank-but-no-start issue on my Hummer.
The vehicle began to exhibit the symptom very intermittently about three months ago. It would crank but not start at first but waiting a while and trying again would usually happen. I did not notice the padlock warning light. I drive the vehicle infrequently so I just thought it was because it sat for periods between use. I did not exhibit the symptom after I started driving. It never did not start anywhere other than my driveway. Then one day I drove the truck to work and it did not start on the way home. Not happy. That’s when I started searching the forum for answers. It appeared to be the passlock system. I attempted to reset the system (30minutes?!?!) but what’s unsuccessful.
Ordered a new ignition switch sensor off of Amazon for $47.
The replacement is is very straightforward.
1. Remove the top and bottom plastic pieces on the steering column
2. remove the row Phillips screws that hold the sensor to the lock cylinder
3. Insert the key in the ignition and turn it to “on”. The sensor will pop off
4. Remove the wiring plug (push the tab in then pull off)
5. Install new sensor by reversing above steps.
Note: the new sensor comes mounted on a ignition lock cylinder and must be removed. To remove you must insert a screwdriver into the cylinder and rotate to mimic turning the ignition to “on” to release the sensor. You should not force the sensor.
You our will have to go through the 30 minute passlock learning cycle.
I took apart part the old sensor and found the tiny resistor was cracked and intermittent open circuit. 11 years of heat, cold, and vibration.
Thanks to all!
The tiny resistor. Cracked. Sorry for the image quality. It is small!
Turn clockwise to release sensor
Part number
thanks to to all of the info on this great forum I was able to diagnose and repair a crank-but-no-start issue on my Hummer.
The vehicle began to exhibit the symptom very intermittently about three months ago. It would crank but not start at first but waiting a while and trying again would usually happen. I did not notice the padlock warning light. I drive the vehicle infrequently so I just thought it was because it sat for periods between use. I did not exhibit the symptom after I started driving. It never did not start anywhere other than my driveway. Then one day I drove the truck to work and it did not start on the way home. Not happy. That’s when I started searching the forum for answers. It appeared to be the passlock system. I attempted to reset the system (30minutes?!?!) but what’s unsuccessful.
Ordered a new ignition switch sensor off of Amazon for $47.
The replacement is is very straightforward.
1. Remove the top and bottom plastic pieces on the steering column
2. remove the row Phillips screws that hold the sensor to the lock cylinder
3. Insert the key in the ignition and turn it to “on”. The sensor will pop off
4. Remove the wiring plug (push the tab in then pull off)
5. Install new sensor by reversing above steps.
Note: the new sensor comes mounted on a ignition lock cylinder and must be removed. To remove you must insert a screwdriver into the cylinder and rotate to mimic turning the ignition to “on” to release the sensor. You should not force the sensor.
You our will have to go through the 30 minute passlock learning cycle.
I took apart part the old sensor and found the tiny resistor was cracked and intermittent open circuit. 11 years of heat, cold, and vibration.
Thanks to all!
The tiny resistor. Cracked. Sorry for the image quality. It is small!
Turn clockwise to release sensor
Part number
