Looking for '87 TCC wiring diagram - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**LEEVON** · 01-30-2008, 01:08 PM

Like the title says, I'm looking for a wiring diagram for an '87 1/2 ton, specifically the torque converter clutch from a 700R4 to the ECM. Why? I am swapping my TH400 for a 700R4 and want to wire the lock-up function to the ECM like factory. Thanks.

krazy10 · 01-30-2008, 01:16 PM

try these guys
http://www.bowtieoverdrives.com/index.shtml
when i put the 350tbi and 700r4 in my s10 they helped me out. i used a switch to lock mine up though..

**LEEVON** · 02-02-2008, 12:23 PM

Thanks krazy10. I am familiar with the vacuum-controlled converter lock-up but I guess I just like doing things the hard way by going with the factory set-up.

So I found a wiring diagram and the tcc solenoid has one wire going directly to the ECM and the other to a "RAWL Diode Module". Does anybody know what this is? I am thinking it is just the brake cancel / cruise switch.

Here is the factory ECM to TCC wiring. Simple, just need the right prom chip, a wire to the ECM, and the other to the "RAWL Diode Module". Anybody?

01-30-2008, 01:08 PM	#1
LEEVON Moderator Join Date: Jul 2006 Location: Ozark, MO Posts: 4,895	Looking for '87 TCC wiring diagram Like the title says, I'm looking for a wiring diagram for an '87 1/2 ton, specifically the torque converter clutch from a 700R4 to the ECM. Why? I am swapping my TH400 for a 700R4 and want to wire the lock-up function to the ECM like factory. Thanks. __________________ '86 GMC C30 Crew ~ '86 C20 Crew ~ '79 K15 Sierra Grande ~ '76 Blazer 2wd ~ '74K10 ~ '71 Cheyenne swb ~'50 3100 bagged ~ '80 Wife ~ Late model kids

01-30-2008, 01:16 PM	#2
krazy10 Registered User Join Date: Dec 2007 Location: Ft.Smith, Ar Posts: 20	Re: Looking for '87 TCC wiring diagram try these guys http://www.bowtieoverdrives.com/index.shtml when i put the 350tbi and 700r4 in my s10 they helped me out. i used a switch to lock mine up though.. Last edited by krazy10; 01-30-2008 at 01:17 PM.

02-02-2008, 12:23 PM	#3
LEEVON Moderator Join Date: Jul 2006 Location: Ozark, MO Posts: 4,895	Re: Looking for '87 TCC wiring diagram Thanks krazy10. I am familiar with the vacuum-controlled converter lock-up but I guess I just like doing things the hard way by going with the factory set-up. So I found a wiring diagram and the tcc solenoid has one wire going directly to the ECM and the other to a "RAWL Diode Module". Does anybody know what this is? I am thinking it is just the brake cancel / cruise switch. Here is the factory ECM to TCC wiring. Simple, just need the right prom chip, a wire to the ECM, and the other to the "RAWL Diode Module". Anybody? __________________ '86 GMC C30 Crew ~ '86 C20 Crew ~ '79 K15 Sierra Grande ~ '76 Blazer 2wd ~ '74K10 ~ '71 Cheyenne swb ~'50 3100 bagged ~ '80 Wife ~ Late model kids



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