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2007 Trailblazer SS
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Discussion Starter · #1 ·
I have a aftermarket fan controller on my tbss but i need to know what wire i could tap into without going straight to the compressor for the a/c trigger.

Is there any other place i could tap into?
 

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'08 TrailblazerSS
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2,987 Posts
Does your compressor clutch connector have 2 wires or 3 wires. If it has 3 wires, you can tap at the hvac control module. If it only has 2 wires, you will have to tap in the engine compartment.
 

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2007 Trailblazer SS
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Discussion Starter · #3 ·
I have 3 wires at compressor. And I have the digital a/c hvac module in dash. What wire do I tap into?
 

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'08 TrailblazerSS
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2,987 Posts
At the hvac control module connector 1, pin B12. Light Green wire.
 
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2007 Trailblazer SS
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381 Posts
Discussion Starter · #5 ·
Ground output at that wire correct?

Also when the compressor cycles will will the output change or it will be constant?

And thank you for the tech support.
 

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'08 TrailblazerSS
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2,987 Posts
Its positive and yes the output will cycle with the compressor.
 
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