DIY: TACH INSTALLATION INSTRUCTIONS

[SirDigby]

hello. so if anyone read through all this and still has questions, i'm going to post what I did, and tomorrow I will post pictures of my install:
first, I tapped into obdII plug, light green or brown wire, for tach signal, ground is at kick panel. those are great places. for my power I ran it to the 7.5A by itself by the 15A fuse in previous post pics. and for illumination I ran it to the "accessory lighting" fuse, another 7.5A fuse, in second position. it should be noted, and it was never mentioned, that if you go the fuse plug route, you should remove the fuse and test which side of the circuit is hot when energized. wire goes on the "ground" side of the fuse plug so the circuit is protected from added load. hot side can cause wire overload/fire condition. on my testing the side of the fuse closest to the driver's seat was the hot side, but I urge you to use a volt meter/test light for testing circuit.
also when running ILLUM. wire to lighting circuit fuse it is not in the dimmer circuit but it is the "parking lights" circuit and remains constant, but not too bright to strain the eye.(imo) I like how if you crank the dimmer all the way down/off, the tach is the only lights!

[SirDigby]

[SirDigby]

I made my own gauge pod using "Testors" contour putty and lots of sandpaper.

[SirDigby]

I wired mine into the cig. lighter fuse.

[Eagle]

Thanks man. I got mine in today and if it wasn't for you I wouldn't know where to connect the tach wire.

[Eagle]

To the original post of course.

[greenskull]

I want to install a tachometer in to 2000 vitz, can any one advice on one to buy.

[littlecars]

Thanks, Yaris friends. I am looking at aftermarket tachs - the '07, MT Hatch is so quiet that I occasionally kill it, or over-rev at a light, and I've driven stick for decades... I just didn't know where to get that RPM signal from. Now I do. Thanks!

[laobo]

Any body for me link to buy Tach device, my yaris 2011

[littlecars]

Thanks all! I drive an '07 stickshift hatch back Yaris. Problems: 1.The engine idles so quietly and smoothly that I cannot hear it, especially with the radio on. 2. Toyota electronically idles the car at around 450 RPM to save gas...
These problems cause me to occasionally over-rev when starting out in first gear, or kill the engine! I've driven stick for 50 years, have several stick shift vehicles, but when you have no tach, a silent engine and a very low factory set idle, an aftermarket tach is a requirment!!

[slothman86]

I found the green tach wire works great with the one prescribed.

I bought a wire tester thing (the pen one) it helped me find the wires I needed. I ended up not putting the illumnination on the same as the power. That ground spot is ingenious tho! :)

I ran every thing from the underdash wiring with the splice clips. On the dimmer switch, I connected illumination to the brown wire. Where the under dash lights are s'posed to plug in, there is a light greenish blue wire that runs the Tach feed (ECU splice your tach control wire to that. The black ground wire from your tach goes to any grounded bolt you want. The Power (red) feed from the tach splices to a green wire on the lower right plug. this in all under the drivers side dash. You basically only have to remove the left kick panel and the storage compartment. Don't forget to test your ground!

Good luck!

PS put your fuses back in the right holes as well!