Coolant temp sensor hook up - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Duncan K · 09-24-2019, 02:16 PM

I have a 2001 LQ4/4L80 going into my 66 GMC. I am using the stock harness following the instructions from LT1swap.com. After depinning the harness my coolant temp sensor wires don't go anywhere. I am going to be using an electric fan, and had the ecu reflashed to run the fan. I am assuming the ECU has to get its info from the coolant temp sensor to trigger the fan?

My question is where should these wires go in the harness? I don't remember taking them out, and I cant find anything on the pin out?

09-24-2019, 02:16 PM	#1
Duncan K Registered User Join Date: Oct 2017 Location: Calgary, Alberta Posts: 211	Coolant temp sensor hook up I have a 2001 LQ4/4L80 going into my 66 GMC. I am using the stock harness following the instructions from LT1swap.com. After depinning the harness my coolant temp sensor wires don't go anywhere. I am going to be using an electric fan, and had the ecu reflashed to run the fan. I am assuming the ECU has to get its info from the coolant temp sensor to trigger the fan? My question is where should these wires go in the harness? I don't remember taking them out, and I cant find anything on the pin out? __________________ 66 GMC 910 My Build thread http://67-72chevytrucks.com/vboard/s...d.php?t=754257



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