Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB - View Single Post - DIY:Valenti 3rd/4th Brake Light Mod-Separate Brake light Triangle-2 Options -Video

RW2FAST4U · 06-03-2018, 11:52 PM

I am wondering if anyone else has run into this?
I just bought and installed my Valenti 4th brake light (supposed to be the "standard" install). (I ordered it from SubiSpeed.com, and it showed up looking like it was brand new and never used.)

Where I was expecting this behavior:

1. Running Lights or Headlights ON = "V" lights up.
2. Step on Brakes = "V" lights up + Triangle flashes 3 times and stays on.
3. Reverse = White Reverse LED's light up.
==========================================
Instead I get this behavior:

1. Running Lights or Headlights ON = NO "V" lights up ever.

2a. Step on Brakes = "V" lights up + Triangle lights up at the same time when I hold the brake pedal down. (BUT only when I have the Fog Lights switched OFF).

2b. Step on Brakes = "V" lights up + Triangle flashes 3 times and stays on while I hold the brake pedal down. (BUT only when I have the Fog Lights switched ON).

3. Reverse = White Reverse LED's light up. (Works fine).
===========================================
I've checked all the wiring, and they are connected to the right ones.
Can anyone explain why I have NO "V" lighting up at all with running lights or headlights on?

I am ok with 2a. and 2b. above, but I have no idea why it does that.

I tried all light switch positions on the stalk (OFF/Auto/Running/Headlights).
(Fog Light switched ON/OFF). Engine off and running.
All variations in the mode of operation resulted in the same behavior above.

Any help explaining this would be greatly appreciated!
(The car is almost bone stock except for a strut tower brace, Perrin intake tube, K&N air filter, and Raceseng shift knob, none of which should impact electrical/lighting.)

Did Valenti make some design changes to how the 4th brake light works?
Or am I missing something?

It came with the 3 wires on the connector and the separate red wire.
I pulled the middle blue wire out of the connector and hooked it up to the green wire on the harness (running/headlight), and the red wire went to the red wire on the harness (brake light).

06-03-2018, 11:52 PM	#44
RW2FAST4U Junior Member Join Date: Jun 2018 Drives: 2015 BRZ Limited/6MT/CWP Location: NorCal Posts: 1 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Valenti 4th Brake Light - Funny Behavior? I am wondering if anyone else has run into this? I just bought and installed my Valenti 4th brake light (supposed to be the "standard" install). (I ordered it from SubiSpeed.com, and it showed up looking like it was brand new and never used.) Where I was expecting this behavior: 1. Running Lights or Headlights ON = "V" lights up. 2. Step on Brakes = "V" lights up + Triangle flashes 3 times and stays on. 3. Reverse = White Reverse LED's light up. ========================================== *Instead I get this behavior:* *1. Running Lights or Headlights ON = NO "V" lights up ever.* 2a. Step on Brakes = "V" lights up + Triangle lights up at the same time when I hold the brake pedal down. (BUT only when I have the Fog Lights switched OFF). 2b. Step on Brakes = "V" lights up + Triangle flashes 3 times and stays on while I hold the brake pedal down. (BUT only when I have the Fog Lights switched ON). 3. Reverse = White Reverse LED's light up. (Works fine). =========================================== I've checked all the wiring, and they are connected to the right ones. Can anyone explain why I have NO "V" lighting up at all with running lights or headlights on? I am ok with 2a. and 2b. above, but I have no idea why it does that. I tried all light switch positions on the stalk (OFF/Auto/Running/Headlights). (Fog Light switched ON/OFF). Engine off and running. All variations in the mode of operation resulted in the same behavior above. Any help explaining this would be greatly appreciated! (The car is almost bone stock except for a strut tower brace, Perrin intake tube, K&N air filter, and Raceseng shift knob, none of which should impact electrical/lighting.) Did Valenti make some design changes to how the 4th brake light works? Or am I missing something? It came with the 3 wires on the connector and the separate red wire. I pulled the middle blue wire out of the connector and hooked it up to the green wire on the harness (running/headlight), and the red wire went to the red wire on the harness (brake light).