DIY: TACH INSTALLATION INSTRUCTIONS

[YarisAddict]

I Spliced the green wire into an orange wire that is on the far bottom left on the ecu port. I've read online that that was where I'm supposed to do it since I have tire pressure monitor. The orange wire is in replace of the greenish blue wire your talking about in cars with tire pressure monitor. It has been driving me crazy that it wont read rpms. Lights work and it has power, also I put my ground exactly where you have yours. Any Ideas?

Thx

09 Yaris3drhatch

[CTScott]

Originally Posted by YarisAddict

I Spliced the green wire into an orange wire that is on the far bottom left on the ecu port. I've read online that that was where I'm supposed to do it since I have tire pressure monitor. The orange wire is in replace of the greenish blue wire your talking about in cars with tire pressure monitor. It has been driving me crazy that it wont read rpms. Lights work and it has power, also I put my ground exactly where you have yours. Any Ideas?

Thx

09 Yaris3drhatch

The orange wire is the correct one for your car. Double check your splice, particularly if you used a tap splice, as that wire is only about 24 AWG, so the tap splice needs to be a tiny one to make a proper connection.

[YarisAddict]

I used the one that came with the kit. Is there any other way to splice the wires together? I'm just afraid now that the orange wire is basically in half once I remove that little plastic connector. Sorry I'm a noob when it comes to the wiring side of things.

[CTScott]

Originally Posted by YarisAddict

I used the one that came with the kit. Is there any other way to splice the wires together? I'm just afraid now that the orange wire is basically in half once I remove that little plastic connector. Sorry I'm a noob when it comes to the wiring side of things.

The best method is to strip insulation off both wires and solder them together and then tape or heat shrink. But, crimp on splices are fine as long as they are the correct size for the wires. If you remove yours and find it did cut the wire, it is actually not a big deal, since the tach signal to the OBD connector is really not used by anything.