New Wiring Harness-No shift - The 1947 - Present Chevrolet & GMC Truck Message Board Network

coacharmstrong1990 · 09-03-2019, 09:55 AM

I just installed a new BP-Automotive Wiring Harness and the quality and ease of installation is great. My engine was running like crap with the homemade harness but is running great with he new harness. However my transmission has stopped shifting. With my janky homemade harness it would shift but now it will not. could this be TCC lock up issue? maybe i have the pole switched in the brake switch? IIRC the purple wire is going to the 3rd post from the top and the 12v constant to the bottom post?

maybe a fluid level issue?

thoughts, ideas?

09-03-2019, 09:55 AM	#1
coacharmstrong1990 Registered User Join Date: Aug 2018 Location: Ashland Kentucky Posts: 27	New Wiring Harness-No shift I just installed a new BP-Automotive Wiring Harness and the quality and ease of installation is great. My engine was running like crap with the homemade harness but is running great with he new harness. However my transmission has stopped shifting. With my janky homemade harness it would shift but now it will not. could this be TCC lock up issue? maybe i have the pole switched in the brake switch? IIRC the purple wire is going to the 3rd post from the top and the 12v constant to the bottom post? maybe a fluid level issue? thoughts, ideas?



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