I need some guidance with OBS wiring

[bobbylog]

You can remove de TBI PCM and cut all TBI engine harness except "oil pressure sender and coolant sender" You can keep the pink or red distributor wire for 12v ignition on and cranking.All the gauge wire can be connected inside the cab in the glove box try to find your electrical diagram.

[Mickeymotormount]

I also ended up using the TBI injector + wires to supply keyed power to the PCM. Since the old PCM controls the ground to the injectors, they are always hot with the key on. Seemed like a good place to get key on 12 volts. The other keyed source for the PCM came from the old HEI ignition power wire. Works like a champ.

[kewljay223]

i didnt check the power distribution diagram before posting this and since your not having any issues i assume it might be ok, but just thinking out loud here.... since the injectors are small, im guessing they dont draw too much current so the fuse/wire is probably not that big... can it handle the load of supplying everything needed for key on power for the new fuse block??? if it just supplys power to a relay, then disreguard this but just somehting to check into...

[SlowAndHighTBI]

Thanks for the info guys. One last question. Is the single wire that plugs into the top of the tbi alternator for the volt gauge? I'll probably need that too.

[kewljay223]

the real big wire you mean that has a lug on the end and is held in place by a nut?? that goes straight to the battery. thats how the alternator charges your batt and powers the rest of the car. your volt meter im pretty sure is just connected to a ign switch positve. check your diagrams out which will tell you

just checked a few diagrams real quick. couldnt find one in your year but they seem to be the same. are you talking about the brown wire? if so then yes you are correct. that does go to your volt gauge. i was wrong about the ign positive. my apologies. heres a diagram from a 91 k1500. should answer your quesion

[SlowAndHighTBI]

Yeah, I was talking about the brown wire, I should have mentioned that. Thanks for the help, Kewljay.

[Mickeymotormount]

I believe that is for the battery light. At least that's what it's for on my 93. Not sure what your guage cluster has for lights.