Okay I have searched every combination of keywords I can think of relating to this and no one has had this problem as far as I can tell. Here's the deal; My horns don't work on my 90 CRX Si. I have checked all the wiring and it's fine.(Now that I've fixed it) The car had no horns on it when I bought it. I had to get some and install them and fix the wires where they had been cut off. But it's cool now, I have 12+ on the White wire with the Green stripe, as the manual states, and continuity between the Blue wire with the Red stripe at the horns and the Blue wire with the Red stripe at the headlight switch. Now the horn wire is grounded by the little horn block in the streering wheel right? And that's grounded by the steering wheel being bolted to the steering shaft right? Good. SO my steering shaft has like 80 ohms of resistance with the vehicle ground. I can't figure out how it's grounded to the chassie to fix this problem, so anyone with insight feel free to help me out.

 

After going back out to the car and looking at it some more, I guessed that it probably grounds through the steering rack somehow, although I didn't want to take all that aprt to find out. I took off the switch assembly and where the shaft goes into the column there is a washer held on by a circlip and it seems that this is a ground area. I beat the washer out with a hammer to make it bigger and put it back together and now I have good grounding. Horns work!

 

there should be a black plug when you remove the air back that could be your problem...it could've got loose on it's own