ok sweet i get it
aiight but i still dont get how A13 and D4 will signal the light bulb to flash and stuff?
is that something the ECU does?
BTW once ive set this up,
i can setup a Vtec globe aswell reading post which we talked about to see when vtec engages!
what im gna do to minimise wiring right,
Connect A13 and to A23/A24 to ground it, Positive end of the bulb t D1
Connect A13 to one end of the globe only,not to A23/A24.Connect the other end of the globe to a power source like the other examples ive given above.If u connect it to D1, this is a permanent supply off the battery & I'm not sure,but it is possible that the ecu might not release the A13 contact when the ignition is off,so the globe could glow permanently if a fault is registered & flatten the battery,like leaving your interior light on.Just go the extra yards & find a supply that is switched on with the ignition key,like clock,etc or just tap a supply with a 3amp fuse off the black/yellow wire coming off the ignition switch.Like i said i could be wrong but until someone else tells u otherwise just do this,u will be puttin the globe up near the cluster anyway so it will be right near the ignition switch wiring.U can connect to D1 for temporary testing purposes,but why cut into your wiring more than u need to.
Connect D4 to A23/A24 as well to ground it (i might put a switch between).
If u do this then u definitely need to put the switch in to take the ecu out of diagnostic mode,for normal operation.Make sure u know which is the off position on the switch & put it somewhere its not gonna get fiddled with.
BTW going by this layout :
http://www.ff-squad.com/tech/wiring/obd1.ecu-pinout.zip
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once this is setup ill make a kool setup to blink stuff when vtec engages ;D