After years of having the SpeedHut gauge layovers I finally installed them. I wanted to tap into the gauge dimmer switch at the junction box instead of at the switch for convenience. Here is where it is located.

Referencing the Electronic Service Manual.
The wiring harness B-66 is at the junction box is located by the kick panel on the driver's side (page 64).
The dimmer switch (Rheostat) has a Green-White wire going into pin 14 of B-66 (page 204).
With harness plugged in, the 14th pin is the far left, 4th up (page 341).
You can remove the harness by pressing the lock clip on the left side and pulling out.

-Eric


97 Eclipse RS
1/4: 16.15 @ 87.35mph

Tap all the wiring at the Electric mirror switch/plug.