I took a look at the main JBeam file with the glowmaps, and here's what I noticed: In terms of glowmap functions, the taillights on the Evo ("evo_taillight_L" and "evo_taillight_R") are a carbon copy of the ones found on the Sunburst ("sunburst_taillight_L" and "sunburst_taillight_R"). The taillights on the latter have three functions - brake light, taillight (i.e. low-high beam), and turn signal (for each respective side), while the ones on the former IRL have only two (brake light and low-high beam). If you were to remove the "signal_L" and "signal_R" functions for the Evo taillights, then the number of functions it can perform would be reduced to two, therefore fixing the issue (as shown below): Aside from that, this Evo IX mod is really nice. It reminds me of the other Evo IX mod released on the forums several years ago, except it's better when the model is mostly scratch-made. It should set the expectations for the Silvia S15 mod you are still working on.
Update: Fixed all known bugs with the glowmaps, reduced file size from 170mb to 60mb, fixed missing or wrong parts in configs and raised RPM limit for some. Clear cache if textures aren't showing up.