4.3 PCM Pinout and VSSB/DRAC Wiring

[tgelles]

I have a 93 4.3 Vin W out of a S10 Blazer and the F12 is Brown and F13 is Brown/White. The tag on the DRAC as large letters CBJ but the part number is not readable maybe last 4 are 4375???

My F13 is brown and my F12 is brown/white haha. What a mess. What color wires come out of your DRAC? If you did the swap do you maybe remember if the DRAC did in fact connect to both F12 and F13? My diagram only has F13 listed

[tgelles]

I found this thread when searching for more info
http://www.gearhead-efi.com/Fuel-Inj...Information-OE

Is it safe to say all computers with the same service number will have the same pin out? I know the PROM can change what i/o's do, but did GM do that?

[4.3JeepYJ]

My F13 is brown and my F12 is brown/white haha. What a mess. What color wires come out of your DRAC? If you did the swap do you maybe remember if the DRAC did in fact connect to both F12 and F13? My diagram only has F13 listed

My lysdexia switched what I meant I thought I said. F12 is brown and white, F13 is brown. We must have the same diagram mine only shows F13 to the PCM.

[tgelles]

My lysdexia switched what I meant I thought I said. F12 is brown and white, F13 is brown. We must have the same diagram mine only shows F13 to the PCM.

You gave me the confidence I needed to hook up a wire I wasn't sure what it did into the PCM. Well it worked. So thank you very much.