Fits: 88-91 Prelude (With factory installed AC system)
Additional: Right-hand drive intermediate and advanced kits require extending 1 wire.
The purpose of this kit is to bypass the original 3G Prelude compressor control unit (CCU). There are 2 reasons you would want to do this:
- Due to high fault rates you want to eliminate the CCU and have a simpler compressor control system.
- You have an H or B series engine swap and want to have working AC.
These kits require no cutting/splicing of the factory wiring. The intermediate and advanced kits require depinning 1 factory wire.
Versions: This wiring kit comes in 3 versions: Basic, intermediate, and advanced. Which version to get depends on your specific setup and desired AC operation:
- Basic: You are running a B20a/B21a using any stock 3rd gen Prelude ECU, you must use the basic kit. The basic kit will not work with engine swaps/aftermarket engine harnesses.
- Intermediate: You have an engine swap but don't want the new OBD1 ECU to control the AC compressor (The AC button is the sole control).
- Advanced: You have an engine swap and you do want the OBD1 ECU to control the AC compressor (This is how later OBD1 Hondas come from the factory).
For engine swaps most people will want to use the advanced kit.
Compressor Adapters: If you are keeping a stock 3G compressor with the 4-wire plug you don't need a compressor adapter. Any other compressor you will need one. H swap compressors should have "Type A" and B swaps "Type B":
Your compressor connector looks like this (H-series)? Order "Type A":
Your compressor connector looks like this (B-series)? Order "Type B":
NOTE: These kits do not bypass the AC pressure switch or AC thermostat so you still have the safety of those items.
Install Instructions:
