I have a 1990 civic si, I recently found that the dash harness was fried. Can I replace this with a 1989 crx si harness? I would like to retain functionality of my sunroof and want to do minimal damage to the harness. Any advice is greatly appreciated, thanks!

 

What was fried? I don't think harnesses go bad like that very often. Also, the 89 to 90 may be different. There are many things that didn't continue between those years.

 

I was looking at those today, and it seems that dash harness (#6) doesn't reach the sunroof. That one is #10, and it likely to terminate at the fusebox.

http://www.hondapartsnow.com/electri...e~harness.html

 

Right. It's probably not the whole harness. That's very unlikely in my opinion. What does fried mean? Copper wire has a lifespan of 50 years in the elements, I can't see it just going bad without being cut or something.

 

There was a short caused by the previous owner, I don't know the reason as to why it fried. I found the main power in the harness had the insulation melted of off it and this was from the fuse box to the radio. It caused multiple shorts and I believe the harness is beyond repair. Judging by the diagram radex7 posted I'm assuming the sunroof and dash harness are two separate harnesses?

 

Do you have either one of the harnesses out yet? (I mean either spare CRX or fried Civic). If you are concerned about going the cheap diy route - which would include doing some continuity testing and heat-shrinking exposed wires, you might as well get the CRX harness and start off with comparing accessible plugs in your civic. Even if it is not 100% fit you can still use it as a source of nicely color-coded wires with proper pins at both ends, and then just swap those.
Another point here is - if you haven't taken the dash out before, and the CRX is a donor at a junk yard - it would be a great practice for you, because even though the dashes look different - they mount to the car in the same way.

And just because it is early morning, and my coffee just started working its magic I will provide you with a picture of a dash harness from a Civic, so you can just visually compare. Based on my notes - the top one supposed to be Civic Si, the bottom one Civic DX.