tiresmoke

the engine is a 94 B18c w\P72 ECU and the car is a 93 Teg RS. the plug is a 2 wire plug.
I have the pink\blue wired up to the A17 ecu pin and the other wire on the connector was black so I grounded it. the secondarys work great. But some people have told me the other wire is not blk it is Yellow\blk and I should run it to 12v+. this sounds fishy to me since the wire is not even yellow\blk. what is the correct way to wire this up.

tiresmoke

this is hown they work I guess.
this is quoted from VTECVillian
"For an OBD1 ECU, the PNK/BLU wire on the IAB sensor plug will go to A17, the -BLK needs to go to 12V- (ground)
OBD1 P72 ECU's use a 12V- trigger for the IAB. then the PNK/BLU goes to A17. The OBD2 P72 ECU's use a 12V+ ground trigger." and the other wire goes to A26

IS this correct? because I've read on this site that it is opposite. But my car works the way it is posted above and no other way.

DaiJekBok

You have it wired right. For OBD1, it's a matter of simply swapping A17 and A20 at the ECU. For OBD2, it's only a little more complicated, as you pointed out.

tiresmoke

i was sure i was right but I did a search and I found this link and it has the wrong info https://honda-tech.com/zerothread?id=814803