Any good with electrical?

[battleversiontc]

its the greenish blue wire on the obd2 diagnostic port right near the hood latch its the farthest left wire the last left column thats the tach wire never use a test light on these obd 2 cars always use a computer safe test light and yes there is a difference between the two test lights. you cant blow up a tach if anybody told you that there stupid you can fry a tach but only if you reverse polarity it by putting power to ground and ground to power but not by trying to hook up a tach wire. if it didnt come with a tach you still have a tach wire. the wiring is the same through every yaris even if they didnt come with a tach its still wired because the ecu still needs a tach signal to know when to fire the coils since there is no distributor

[Taiyaki]

That was the first wire I tried, but after it didnt work, I was told that 09's have a different wire. So I tried that wire and still doesnt work. unless i tapped the wrong green wire.

this is the green wire i tapped on the OBD2



and this is the wire other told me to tap and still didnt work



haha and i thought it would be a quick 30min install...

[battleversiontc]

um imma go look at the schematic sheet real quick

[battleversiontc]

actually try the blue wires i know they come in pairs thats why thats how my 08 is

[Taiyaki]

haha ok ill try all the blue ones, now this wont like blow up my tach will it? haha

[Taiyaki]

ok well im bored, so im going to go try all the blue wires now, and will let you know. haha

[battleversiontc]

no it wont but its the lt green wire thats what my wire diagram says are you sure you getting main power i would try re grounding it to the chassis and running the power wire to the cig you might be not getting enough voltage and what kinda of tach is it anyways

[Taiyaki]

I grounded it to the chassis and powered to the deck. I have a Pivot tach, my friend just came back from Japan so I told him to pick it up for me. 24,800 yen didnt want to pay that much but it is a sexy tach~ haha

[battleversiontc]

what colors come out of the tach

[battleversiontc]

red is ignition orange is constant 12 volts black is ground white is rpm tach signal i found my old manual so the orange you using is the 12 volts constant wire and you should be able to hook the white wire to the brown wire i believe thats the tach its the same pin as my 08 but my color is green

[Taiyaki]

Ok I jsut tried all of the blue wires and still no go, and idk why but now the backlight stays on.

The wires coming out is Orange, red, white, black. all with gray dots.

[battleversiontc]

ok well how you have it hooked up follow my post that i just posted those are the correct placement of the wiring refer to post 28

[battleversiontc]

let me know if that works

[Taiyaki]

oh crap! haha
I dont know the names like 12volt consistant, but if im tapping from my deck it would be

[tach to deck]

red to yellow
black to well ground
orange to red
white to tach

[battleversiontc]

red to red
orange to yellow
black to ground
white to the lt brown wire in the obd2 plug

[battleversiontc]

that is why its not working and i realized it once i saw the pics and looked at my manual

[battleversiontc]

so hopefully that works out for you

[Taiyaki]

Sweet it works! but my backlight is on even with the car off. maybe i shouldnt tap to the yellow on the deck? ill try search i remember seeing lots of post when trying to look for how to fix mines. thanks man