Wiring help :/

[Blackcherrytsi]

So, story is I got my shell with zero wiring in it but it's now setup to run switches/relays for all things I need (both fuel pumps,fan,ignition,gauges,etc) ANYWHO.... I'm making a ecu harness for only the things I need and I'm stuck on just a few wires.

- I know A25/B1 splice together at the main relay but I'm not using a main relay where do I go with these two

- I also have the 12v wires for the iacv,iat, and vss... Do I just put them all to a 12v source when ignition is turned on?

- That leads to my last question, I'm installing toggles for ignition/acc and push start but I don't have the wiring for the stock key spot. Which wires from the ecu do I need to tap into (other then starter signal) to make that work?

Sorry if these are noob questions or if you guys have no clue what I'm talking about but this is about all I have left is this damn wiring!

[thevtecnician]

Run A25/B1 off of a relay with key-on

Same for everything one the engine that needs 12v ( o2, eacv, injectors, etc.) in fact it can run off the same ecu relay. Make sure the power out of the relay is fused


The iat is NOT a 12 v circuit that will fry the sensor and potentially the ecu

[inspector01]

Run A25/B1 off of a relay with key-on

Same for everything one the engine that needs 12v ( o2, eacv, injectors, etc.) in fact it can run off the same ecu relay. Make sure the power out of the relay is fused


The iat is NOT a 12 v circuit that will fry the sensor and potentially the ecu

^^^Good answers, remember that none of the 2 wire sensors use 12v, and some of the sensors need 5v, not 12.

[Blackcherrytsi]

Would anyone be able to make a quick paint diagram of the wiring? I'm at about my end, I would pay some one to come wire this all up... I've got most of it done but I have 12v eacv, voltage back up, a25/b1, 12v vss, one called ait light?

[Blackcherrytsi]

Ok so I cleared up a few things and maybe I can get help now, all my loose wires are in the drivers shock tower blog "c126" wires

#1 Ignition source for alternator
#5 Ignition power
#6 VSS signal
#12 Injector power

Where shall I run these buggers?

[thevtecnician]

Anything black/yellow needs 12V key-on from the ignition itself.

VSS signal comes from VSS and splits in 2. One to ecu, and one to gauge cluster.

injector power is provided by the main relay from factory. So you need a relay now since you aren't running the main relay, which is 2 relays in one (one powering ecu/engine sensors, and one to trigger the fuel pump)

Hope that helps

[thevtecnician]

Also B9 should see 12v when the starter is being engaged. So run a wire from your new ignition switch to the ecu.

[2point1]

Also B9 should see 12v when the starter is being engaged. So run a wire from your new ignition switch to the ecu.

You don't need to use b9. Works fine without it hooked up.

[thevtecnician]

Good to know. I haven't tried without it yet!