There are two ground WIRES that are attached to ONE eyelet. Maybe the diagram at this site would help (if the PU trucks are the same), but I don't know in what year your harness was born:
Electric fan wiring question
- Thread starter 88lance
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02slpSS
TYF Newbie
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- May 25, 2024
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I appreciate your help my harness is from a 2005 Tahoe, I screenshotted the diagram and I circled where I don’t understand, what is the 1 wire and is 2 the double ground that is attached to the eyelet
Attachments
rockola1971
Full Access Member
Your circled #1 is the power feed for Relay #3 which is half of the control for high speed fan relay control (Both fans on). Relay #2 is the other half of high speed control. Your circled #2 is indeed the double ground at the eyelet. This 2 wire ground is switched at Fan relay #3 and allows that double eyelet to provide the left fan a ground during low speed mode. Honestly the engineers overthought this setup and it is a dumb way to do it.
