92_luder

Car:
93 Civic CX HB
B18b1/y21

The car had an r12 system installed by honda but the previous owner removed it all besides the wiring and the underdash evaporator. I also have the ls a/c bracket.

What i want to do is pull the entire system off of an 94-95 eg. From What ive been reading the wires are different between the r12 system and the r134 system.

My questions:
1.) In converting to r134, will the wiring jus consist of redoing connectors to match the r134 system?

2.)Are the connectors for a r12 system different from and r134 system at all?

2.) What belt do i need to use when using the d-series pump on the LS bracket and LS motor?

94EG8

You need the underdash subharness from a '94 - '95 Civic (any model, and it doesn't matter if it had air or not, it's the same harness that plugs into the blower motor and it's about 3 feet long) all lines, evaporator, condenser, compressor from a '94 civic and an A/C bracket from a '97 - '01 CR-V or '94 - '97 Del Sol VTEC (the LS bracket wont work)

92_luder

if the only difference in wiring is the underdash stuff that is all there and wired still.....can i use the r12 evaporator and r134 lines etc etc.

94EG8

I'm not positive but I think the the evaporator core needs to be from a '94 - '95 civic.

92_luder

from what ive read the only difference between the two is the r12 core has 2 pin connector for the evap thermostat and the r134 has a 3 pin......everything else is the same?

94EG8

That's correct, but the evaporator core itself is different as well IIRC. In any case the harness isn't hard to change and shouldn't cost much.

92_luder

different how, cuz i mean if i had a complete r12 system it could take the r134 freon.....if the line bolt up, i dont see why i wouldnt be able to use it. i think im gonna try it...worst case scenario...it doesnt work and i have to buy the harness and box right

94EG8

The lines don't match up IIRC.