I am doing the 99 climate control conversion, and can't figure out where this brown plug goes. Anybody know????

 

maybe a relay?

 

Check here... or pm the guy if you need to.
https://honda-tech.com/zerothread?id=605432
Hope it helps and good luck

 

if im not mistaken,,, that harness goes to the back of the actual climate control part.. where you turn hot to cold and 1-5. At least that's where it goes for 96-98 models.

 

Well that harness doesn't reach back to the climate control.
There's no slack for it to go anywhere really.

 

I did the swap too. on the 99-00 theres a relay on the bottom of the blower. I have no idea what its for but it doesnt seem to affect the car in any way. if someone has a service manual or helms for a 99-00 mabe they could check what that relay is for.

 

ah okay, so I'm missing that relay.