Truck Harness Question

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Dec 11, 2017 | 09:53 AM

LS1MCSS

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From: Dover, Arkansas

Truck Harness Question

I'm putting a 2006, 6.0 in my Blazer and want to add pins to the harness for fan control. I know where to add them, but do they put out a ground signal like an f-body? I want to wire them for high and low speed operation. The three relay setups are easy to build and work good. I just need to be sure I will get a ground signal coming from the PCM.

Dec 11, 2017 | 02:02 PM

8.Lug

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Dec 11, 2017 | 06:07 PM

ls1nova71

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Yes, they put out the same ground signal as the cars do, but you have to enable them in the tune of course.

Dec 12, 2017 | 09:53 AM

gsjimmy

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From: So. WIS

Blazer?

Is this the S series Blazer or a Full size K-5? lt1tech has the circuit plans for the wiring, uses 3 relays to power the fans. I did the install in a couple hours, not too bad of a job

Dec 12, 2017 | 11:14 AM

LS1MCSS

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Quote:

Originally Posted by gsjimmy

Is this the S series Blazer or a Full size K-5? lt1tech has the circuit plans for the wiring, uses 3 relays to power the fans. I did the install in a couple hours, not too bad of a job

It's an 85 K5. I already have the three relay setup built. I have built a lot of those. I just needed the signal information.