Code P1641 after harness swap - Chevy Impala SS Forum
 
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post #1 of 3 (permalink) Old 07-17-2016, 03:49 PM Thread Starter
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Code P1641 after harness swap

Hello, I have trouble code p1641 after engine wiring harness swap. The CEL scanner says it's "Fan 1 Relay Control Circuit". My old harness had relays for primary & secondary fans. The new one just has sec fan relay. My mechanic tried to clear the code, but it wouldn't. WHAT TO DO ABOUT THIS???
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post #2 of 3 (permalink) Old 07-17-2016, 05:10 PM
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Originally Posted by YoungLionJacq View Post
Hello, I have trouble code p1641 after engine wiring harness swap. The CEL scanner says it's "Fan 1 Relay Control Circuit". My old harness had relays for primary & secondary fans. The new one just has sec fan relay. My mechanic tried to clear the code, but it wouldn't. WHAT TO DO ABOUT THIS???
More fun for you.. I'm sorry you are going through this!

Again, this is why I rebuilt the guys wiring harness that was from his car and used the connectors from harness we purchased.

This is the issue. You have a harness from a tow pack roadmaster.
You need to add the relay for the primary fan.

You need to do the wiring part from this writeup
The HERD Garage Forum - Replace Stock Mechanical Fan With Electric Fan

95 Caprice Wagon 100 K daily driver.
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post #3 of 3 (permalink) Old 07-17-2016, 11:37 PM Thread Starter
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CapriceUtah, you're a life saver! I'll go thru it when I get a chance; hopefully tomorrow.

THANK YOU!
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