This module under the dash also has a switch to choose between "Stock" or "Tru-Sequence" behavior. There is a "line driver" module that I installed in the left end of the dash that senses and amplifies the signals from the BCM to send to the main Tru-Sequence module in the trunk. With this controlled by Tru-Sequence, the load resistors never see power when the brakes or hazards are on, and actually remain quite cool while the turn signal is on. This greatly reduces the amount of power that gets dumped into the load resistors which could cause them to get very hot. Tru-Sequence accounts for this and only connects the BCM to the load resistors for a few hundred milliseconds at the beginning of only turn signal blinks. As it turns out, the BCM only checks for bulbs out at the beginning of a turn signal blink, and not when the brakes or hazards are applied. This is another aspect where Tru-Sequence is smart. This is to keep the BCM from thinking all the bulbs are out (since they are no longer connected to the BCM and there is no load). While Tru-Sequence has control of the tail lights, the car's computer (BCM) is connected to the load resistors in the trunk. This pattern will continue until the bad bulb is replaced. Tru-Sequence will remain disabled until the car is turned off and back on. If this happens, it will automatically disable itself and give control back to the car's computer, which will in turn notify you that you have a bulb out (stock behavior). When you turn the key to the "accessory" or "off" positions, Tru-Sequence gives full control back to the car's computer (BCM).Įven though Tru-Sequence has control, it can still sense if a tail light is out. As long as the key is in the "run" position (car can be running or not), Tru-Sequence takes control of the bright filaments of the 4 tail light bulbs. Not only are the turn signals fully sequential but so are the brakes and hazards. The schematics, PCB design, CAD models, renderings, PCB component assembly, the 500 lines of code that it runs, the enclosures, and installation in the car were all done by me. I designed and built everything myself (with the exception of having a board house manufacture the PCB's). There were many iterations with lots of improvements along the way. What you see here is the end result of 2 years of hard work and late nights hunched over the books/computer/soldering iron/oscilloscope/car/etc. Since there was nothing on the market for this, I took it upon myself to a system from scratch. I consider the others to execute only a "half sequence", if you will. I wanted something similar, but I wanted my signals to execute a FULL sequence (ON-ON-OFF-OFF) instead of just a sequential "on" pattern and then have all the bulbs shut off all at once (which is how every other sequential signal works). You are probably familiar with the sequential rear turn signals on some Mustangs and other vehicles. It is a sequential tail light controller for my 5th gen Camaro. This is a project (endeavor) I've been working on for the past 2 years. I put 2 years of work into this project, and would really like it to get some exposure. *MODERATORS* - It would be really awesome if you would leave this in the general discussion for a while.
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