Had this car for a few years now. Never got around to asking. Any insight would be appreciated. https://imgur.com/gallery/ESiYm

 

Pretty sure that is part of the SRS system, that may be a data link connector for the system if it is directly coming off the module.



That looks like a generic car alarm antenna. Usually just crammed under the dash or carpet.



Two wire blue connector is the 'SCS' service check connector. When checking/retrieving codes you will jumper this connector with a wire, turn ignition to II(ON) and look for any of the CEL/ABS/D4 lamps to blink out a code short blinks are counts of one " - - -" = 3, longer blinks are counts of 10 " ___ ___ ___" = 30.
Jumper this also when checking/adjusting timing to prevent the ECM from advancing/retarding ignition.

Three wire blue connector is the Honda Data Link Connector. With the appropriate adapter and scanner, one could monitor limited ECM functionality much like with the later OBDII 16 pin.
Adapters and scanners for the HDLC are more common in Europe/Japan/Oceania as they did not get the OBDII connector until '99. No idea if a Euro scanner would work on a USDM cars, although the French Coupes/Wagons are just 2.0litre versions of the US market vehicles.

Orange connector is for the ABS system. I believe this is another data link connector, basically you will never use it.

 

Thanks for all this great info. I'm gad to know that those plugs are all things I can stop worrying about. I do recall using the 2-pin blue plug with a paperclip to diagnose a CEL when my O2 sensor died.
As for the wire, I think at this point I have to get inside there to get to the bottom of things because the car doesn't have any sort of alarm, OEM or aftermarket.

 

If the deck was replaced with an aftermarket unit, it may have had a remote control and this may be the antenna for it.

 

To complete the info. regarding the plugs: the red connector is the short connector for the passenger air bag. When the passenger air bag harness connector is disconnected from the SRS harness, then that end of the connector should be plugged into the red short connector to reduce the risk of the air bag deploying.

 

Yeah, maybe. It definitely had a remote at some point. Sadly I have since lost it.

Good to know. Thanks so much for your help