Well I've searched and searched and now have given up. I've got a small 3'' tach I want to wire on to my dx.... its just a basic tach so i can rpm and what im at on the highway. I don't want to wire off the distributor... I rather do it at the ecu but I do not know which wire to splice into.

 

Whats wrong with wiring it off the distributor? Thats what we all have done. I wouldnt even know where to begin wiring it up to the ECU. Whats the added benefit hacking into the ECU wiring instead?

 

Its alot easyer to wire from inside of the car rather than to send a wire threw the firewall to run off the distributor wiring.

 

Actually only takes like 5 mins to go from the distributor to inside the car to your tach. And if it's that big of a deal I'm sure you could find some existing loom to route the wire through as close as you can to the firewall opening.

 

I still rather do it from the inside of the car.. its so much easyer imo. I've done it on all my Toyota's I just don't have my Honda book yet (its being shiped from ebay)

 

Stop being lazy, cut the ******* wire on the diz. and ******* splice it in

If you dont know what your doing, and never worked with an ECU before, then dont go hooking wires up to it

 

I spliced my dizzy. just run it through with some existing wiring harnesses. Not hard, and it's alot more reliable.

 

It's not being lazy... I have enough damn wires in my engine bay already.. I prefer not taping into the wires from the distributor from the engine bay, I rather do it from inside of the car where those wires connect to the ecu. Anybody know which wire?

 

Just take the cluster apart and use the blue wire from the cluster. I would think that would be easier to do but if you got to go to the ecu I am sure its a pure blue wire. Waht yaer car ecu you got?

 

Or you can just get a tach from a Civic LX or a Civic/CRX Si. It should fit right in and now you'll have a tach

Otherwise I'd just use the blue wire behind the cluster... OR... use a multimeter to figure out which wire that is at the ECU.