hope this will help u.... some writeup fr me. but sorry coz i'm not very good in explaining... haha
99 spec climate control (digital) conversion checklist :-
overall look for ur under dashboard - aircond system... this refer to 96 EK4 wiring
1.
Wiring Harness - i believe that someone can mod it fr current wiring to digital aircond wiring outside there. but the charges i believe is more expensive than the cost for u to get another used complete set wiring harness. one thing u need to make sure when u buy the digital climate control is the wiring harness. dun simply buy the climate only.
2.
Digital Blower - if u refer to hondatech climate conversion the picture shown that the socket for resistor (i'm not sure what this thing call) is using 3 pin one. but actually it depen on ur wiring harness. if u got the wiring harness with 4 pin, then u have to find digital blower with 4 pin socket for the resistor. And make sure the digital blower got the relay. the location of the relay is at the bottom of the blower.
3.
Cooling Coil - you can use back ur cooling coil but u need to mod wiring for the temp sensor socket since ur original one is using 3 pin socket n the digital using 2 pin socket. alternatively, u can find CRV cooling coil coz its using the same
temp sensor (2 pin).
original temp sensor socket
4.
Center Core with Heater - the center core design is same with any local model or 96 model except the digital got heater n motorize 'door' to control hot air volume to be mixed with cool air produced by the cooling coil. you better get a complete set of digital center core to avoid any hassle in mix-n-match the parts. this digital center core u can get it fr any imported model such as EK3 96 or 99 as long as it using digital climate control.
my center core collection. haha
5.
air vent - this air vent is located inside the dashboard and mandatory required if u converting 96 dashboard with 99 spec digital climate control. u need to dismantle the dashboard in order to install it.
6.
99 spec climate control. better if u can get it together with the metal frame support. the frame is to support the radio unit n to be tighten to the dashboard metal frame.
7.
a good workshop with good workmanship. i can recommend if u want.
overall look for ur under dashboard - aircond system... AFTER conversion to 99 Spec Digital Climate Control.