any obd0 DA wiring experts out there? i've recently been handed a nightmare of a 90 teg...somebody hacked a b18c1 into this car, it ran when my buddy dropped it off...pulled it in to attempt to figure out some of the wiring on this car and get the vtec to work and the fuc*er shut off on me and will no longer run (i guess the vtec is the least of my worries)

car is all obd0, looks like original engine harness was used and modified for the b18c...car has an obd0 pr3 computer...most of the vtec wiring "looks" right (i haven't pinned everything out yet due to the no start issue)

anyway here is the problem I am currently facing... the 10amp ecu fuse in the underhood fuse block keeps popping...I'm assuming a short to ground somewhere, but I'm having a hard time finding the diagrams I need to chase it

with the ecu unplugged and the ignition on the fuse still pops...however if I unplug the pgmfi relay the fuse will not pop...ive tested the relay as per the factory manual and it passes all tests for continuity as you power up the different pins...

any body have any wiring diagrams for a 90 teg? or have any idea what I can chase? I suppose i can pull the fuse block apart and chase the wires from the ecu fuse back until i can find the short, I was just wondering if anyone has ever seen this before or has a shortcut I can take

 

ok so I've managed to get the ecu fuse to stop blowing and have isolated the problem to the two wires coming out of pin 5 on the pgmfi main relay...I've cut these two wires and the 10amp ecu fuse has stopped popping...looks like I'll either trace those back or run my own new wiring...hopefully this helps someone else as well