Sierra 1500 2WD V8-5.3L VIN Z Flex Fuel (2006)
Step 12 - Step 19
The numbers below refer to the step numbers on the diagnostic table.
2. This step tests for an open fog lamp fuse.
3. This step tests for open cruise fuse.
4. This step tests the battery positive circuit for battery voltage.
5. This step tests the battery positive circuit for an open.
6. This step tests the PTO relay output circuit for an open.
7. This step tests the PTO ON signal circuit for battery voltage.
8. This step tests the PTO ON signal circuit for an open.
9. This step tests the cruise control set/coast switch signal circuit for battery voltage.
10. This step tests the PTO status circuit for an open.
11. This step tests the PTO switch and PTO unit ground circuits for an open.
12. This step tests the battery positive and PTO relay output circuits for a short to ground.
13. This step tests the ignition 3 circuit for a short to ground.
14. This step tests the cruise control ON switch signal, cruise control set/coast signal, PTO status, and PTO ON signal circuits for a short to ground.
15. This step tests the control side of the PTO relay for proper operation.
