vtec wires, as far as i know, are not part of the main harness. i guess you could just make your own subhaness with a spade connector and soe wire and be done with it. that’s what i ended up doing.
This means you can’t use a gsr engine harness with an rs/ls/gs main harness. Reuse your stock engine harness, run the extra wires from the ecu through the firewall, install a stock connector to these wires.
Run the extra wires needed on the engine itself, follow stock routing. Personally I suggest ripping apart the stock loom and adding your wires to the stock ones. Gather all of these wires in one spot. Install the other half of the wiring connectore (remember the one you put on the wires you ran through the firewall).
Now you have a stock looking engine harness and only one extra connector which needs to be disconnected when removing the engine.
So after counting wires up and obtaining spare ecu connectors from a 92 5spd, i found that the number of wires in the DB2 match up to the number of wires of the spare connectors. Does that mean the vtec wires arent in the main harness?
anyone have pictures of their gsr ecu to main harness?
As I stated, the RS, LS, GS cars do not come with ANY of the vtec wiring. I’m not sure why the wire numbers are the same, possibly there are some other components which the B18a uses (an extra solenoid maybe?).
Follow the steps I already typed in regard to creating a sub harness which runs from the engine to the ecu.
Use the ECU plugs you have, detatch the back of them and remove a couple of the wires with the actual pins attached. Solder these to the wires at the ECU end of your sub harness.
Open up the ecu plugs on your stock main harness. Insert the pins you just soldered on (in the correct location of course).
Your vtec wiring is going to be completely separate from the stock main harness. You are creating a sub harness. You could try to run them in the stock main harness but that would be a LOT of work. You’ld need to un-loom the entire thing, run the wires, remove/add different plugs, change pins on various connectors…etc…etc…
If you need some more specifics about which pins are which → Engine Swap Guide (found in the Teg Tips section - not the forums).
For more info about de-pinning and pinning ecu plugs —> google search and H-T search. There are a couple site with instructions and photos posted (I don’t know them off hand). Or just mess w/ the extra plugs you have, since they’re extra you can break them in the process of learning how they come apart and the pins come out - then you should be OK when reinstalling on your stock plugs.