hey guys so im gonna pick up a hf cluster with a shift light for my hatch how do i make the shift light work at a certain rpm or at the red line???

 

i was under the impression that it was controlled by the ecu

 

In my opinion - the easiest/quickest way would be to get a MSD RPM output box, some type of generic shift light, or make your own circuit board - then run the output to the shift light on your cluster. If you wanted to spend some money - get a S300 setup and change one of the outputs to activate at a certain RPM and do it that way. There is a few ways to go about it but all of them require time and/or money...

 

What ECU are you using now and is it chipped?
Thinking if it's chipped then maybe you can add the little bit of hardware similar to what you do for IAB control and just reprogram that for shift light.

 

im runnning a p06 chipped to p28 vtec so im guessing easyest way would just be to set it up with the ecu im running???