Honda CRX Forum banner
1 - 2 of 2 Posts

·
Registered
Joined
·
2,597 Posts
...

OBD-0:
A21 - No connection
B09 - Reverse Lights Switch - (HF only) Between the switch and bulbs
B13 - Starter Signal - fed by fuse 2, same as blu/wht wire @ main relay
B15 - Ignition Signal Pin 1 - goes to the ignitor unit in the distributor

OBD-1:
A21 - Ignition Signal Pin 1 - goes to the ignitor unit in the distributor
B09 - Starter Signal - The starter solenoid signal after the interlock relay
B13 - TDC P - Goes to the TDC sensor in the distributor
B15 - CRNK P - Goes to the Crank sensor in the distributor

The heavy blk/yel wire is the distributor's power source from the ignition switch. The ignition signal wire you're looking for at pin B15/A21 is solid white on an OBD-0 harness or yel/grn on OBD-1.
 

·
Registered
Joined
·
2,597 Posts
The ground points you're talking about are just shielding grounds - I don't think the ECU will use them for anything but noise rejection. Matching the colors should be fine - that's what I did with my conversion.
The ECU's primary grounds should be A02->A23 and A04->A24. Heh... they could stand to be a little less cryptic with the function labels. It doesn't help if you have to figure out what the wire is for before you understand the label.
Oh, and yes, you should get 12v+ on the heavy blk/yel wire when the ignition is switched on.
 
1 - 2 of 2 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top