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Air smog pump?

Tiny
JAKNIYAH
  • MEMBER
  • 2008 HUMMER H3
  • 150,000 MILES
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?
Monday, March 13th, 2023 AT 11:34 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
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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Tuesday, March 14th, 2023 AT 11:23 AM

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