well this is what happened

i got a 90 Civic Si (just a shell)

started the swap and realized edward scissor hands must have worked on it before

wires were hacked beyond belief (ghetto rigged to OBD1)

i replaced the cars main harness with one from a 89 Civic Si

now the brake lights dont work and tach dont work.

after the b18a1 swap w/ b16 tranny car starts as easy as possible

does the accessory harness need to be switched to an 88-89 as well for the tach to work

 

been there twice i will get some more diagrams scan them and host them to help some guys out but i need help give me a day or so