Component Testing

WARNING: This page is about a different car, the 2021 GMC Sierra 3500 HD and 2021 GMC Sierra 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

Ignition/Vehicle - Off
Disconnect the electrical connector:S47D Seat Memory Switch - Driver
Test for infinite resistance between the test points:Switch - All - Released
- Signal circuit terminal 3 & Low Reference circuit terminal 2
- Signal circuit terminal 4 & Low Reference circuit terminal 2
- If less than infinite resistance
  Replace the component:S47D Seat Memory Switch - Driver
- Go to next step: If infinite resistance
Test for less than 4 ohms between the test points:Signal circuit terminal 4 & Low Reference circuit terminal 2.
Seat Memory Set Switch - Pressed
- If 4 ohms or greater
  Replace the component:S47D Seat Memory Switch - Driver
- Go to next step: If less than 4 ohms
Test for 573 to 701 ohms between the test points:Signal circuit terminal 3 & Low Reference circuit terminal 2
Memory 1 Switch - Pressed
- If not between 573 and 701 ohms
  Replace the component:S47D Seat Memory Switch - Driver
- Go to next step: If between 573 and 701 ohms
Test for 1800 to 2201 ohms between the test points:Signal circuit terminal 3 & Low Reference circuit terminal 2
Memory 2 Switch - Pressed
- If not between 1800 and 2201 ohms
  Replace the component:S47D Seat Memory Switch - Driver
- Go to next step: If between 1800 and 2201 ohms
Test for 5.25 k to 6.73 kohms between the test points:Signal circuit terminal 3 & Low Reference circuit terminal 2
Seat Memory Exit Switch - Pressed
- If not between 5.52 k and 6.73 kohms
  Replace the component:S47D Seat Memory Switch - Driver
- Go to next step: If between 5.52 k and 6.73 kohms
All OK.