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Old 03-05-2018, 04:13 PM   #8
87Skier
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Join Date: Mar 2014
Location: Corvallis, OR
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Re: 6L80 transmission rebuild, relearn, & TCC wiring

Quote:
Originally Posted by First c10 View Post
The trans is working great. My question now is th brake switch applied yes/no. Like I said in the earlier post I see it working line it is supposed to with the engine on and key switch on. But after it is started it no longer works.
Do you know what other 2 wires or positions on the E38 ECM? I don’t see them on my pinouts sheet. Thanks for the help.
I've been working on this too. If you followed LT1swaps wiring diagram, the brake position sensor wiring isn't mentioned. I found it on another wiring diagram, but here is the short list:

On connector J1 (X1)
Pin Wire Function
26 0.5 YE Brake apply sensor signal
42 0.5 BN Brake apply sensor low reference
54 0.5 WH Brake apply sensor supply voltage

Here is the pdf with all the wiring https://www.gmupfitter.com/publicat/...lec_080212.pdf
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1972 GMC Jimmy Custom 4.8L (L20)/6L90E/NP205
1989 Chevy Suburban V2500 350/Turbo 400/4.11 gears
1996 Chevy Suburban K1500 350/4L60E
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