Air smog pump?

2008 HUMMER H3
150,000 MILES
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JAKNIYAH
  • MEMBER
  • 31 POSTS
When i directly tested the air smog pump with the 12v battery with a piece of wire, it will run, but if the pump is connected to the wire harness, it will not run. The wire harness is in good condition. Is it likely the pump is bad?
Mar 13, 2023 at 11:34 AM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
We can check for power and ground at the pump feed wires to see if the pump is getting a good ground and power. Here is a guide to help you with the testing and there is a fuse and relay that runs the air pump which I have included in the images below.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Check out the images (below). Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.
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Mar 14, 2023 at 11:23 AM
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