Having a shift light is a handy way to keep an eye on your revs at the track without having to look down at the gauges. Installing it is pretty easy if you’re comfortable with splicing wires. In this DIY, we’ll add an Ecliptech Shift I shift light to a Porsche 996. The process is similar for any OBDII car made after 1996.
1. Open fuse panel door and remove four screws.
2. Remove the carpeted surround to get to the third Torx screw holding the OBD-II port holder. (If you have small hands, you may be able to remove the port from the holder without dropping the port holder, if so, skip to #4 below.)
3. Remove the three Torx screws holding the OBD-II port.
4. Remove the OBD-II port from the bracket by squeezing the pins on the back of the connector.
5. Locate the brown (ground) wire going to pin #4 and the violet/green (RPM Signal) wire going to pin #9.
6. Position the shift light approximately where you want to install it and run the wires through the dash.
7. Connect the black wire from the shift light to brown ground wire going to pin #4.
8. Connect the blue/black wire from the shift light to the violet/green RPM Signal wire going to pin #9.
9. Locate an accessory fuse, 7 amps or less that is powered only when the key is in the on position (I used a5 amp fuse) and use a fuse doubler to “add-a-fuse”.
10. Connect the red wire from the shift light to your new power source.
11. Insert the key and turn to he on position. The shift light should perform a self test if wired correctly.
12. Secure any excess wire under the dash.
13. Reattach the OBD-II port holder.
14. Reattach the fuse surround and replace the fuse cover.
15. Use double-sided tape to attach the shift light.
16. Follow the instructions that came with the shift light to configure it.
I really like that this unit is fully configurable. You can set the shift points, the pattern, the light intensity, whatever you need to get your attention without being obtrusive. If you car has OBD-II you can install it. You just need to know where to pick up the RPM signal. I put one in the MINI too.