i already searched the forums without any luck. i bought a hks turbo timer T1 out here (in japan) and the wiring harness. the instructions are in japanese so i went online and found the englisht version. i noticed that the turbo timer i have doesn't have the blue speed sensor wire. my understanding is that the speed sensor wire is another line of defense if your car is stolen while the engine is still running. in that case, even though i don't have the speed sensor wire, the turbo timer should function correctly as long as i have the e-brake wire, wiring harness, and rpm wire hooked up. is this correct?

 

You really don't need any of those except the harness. To answer your questions.. yes