Good day folks. Brand new to the group. I am retired and now a tinkerer. I intend to get a lot more into electronics focusing on home automation and look forward to reading and learning as I hangout in the background.
But the more urgent reason I found this site is that I am in desperate need of converting a 3 wire brake and turn signal system to a 2 wire combined brake turn signal system. I have now bought three different controllers and none have worked correctly. This last one is the only one where the circuit board has been accessible and I was hoping for some help in translating its function into something I can understand.
I have attached photo of front/back. Side with 4 wires is supposed to be the side fed by the vehicle. So black would be DC- and the yellow (left turn signal), red (brake lights), and green (right turn signal) would each be fed with DC12V+depending on which was active on the vehicle. Then the magic of the circuit board is that it is supposed to merge the brake signal into each turn signal, as the same bulb element is used for both functions on a trailer.
When I feed 12V to the vehicle side yellow/green/or red, I do not get any voltage output from the center pin of the transistors leading to the trailer side green or yellow. Interestingly, when I feed 12V pwr the opposite way (to the trailer side yellow or green), then I do get 12V to the corresponding vehicle side yellow or green and also red.
I am quite new to electronics. I know how to read (most) resistors, I understand function and polarity of diodes, Generally know how to use a meter. I have confirmed that when I do feed the power from the vehicle three wire side (one with red), that I do get 12V to the outside pins on both transistors. But only mV from either center pin.
Any assistance would be most appreciated. If you need me to draw this out I will do my best.
But the more urgent reason I found this site is that I am in desperate need of converting a 3 wire brake and turn signal system to a 2 wire combined brake turn signal system. I have now bought three different controllers and none have worked correctly. This last one is the only one where the circuit board has been accessible and I was hoping for some help in translating its function into something I can understand.
I have attached photo of front/back. Side with 4 wires is supposed to be the side fed by the vehicle. So black would be DC- and the yellow (left turn signal), red (brake lights), and green (right turn signal) would each be fed with DC12V+depending on which was active on the vehicle. Then the magic of the circuit board is that it is supposed to merge the brake signal into each turn signal, as the same bulb element is used for both functions on a trailer.
When I feed 12V to the vehicle side yellow/green/or red, I do not get any voltage output from the center pin of the transistors leading to the trailer side green or yellow. Interestingly, when I feed 12V pwr the opposite way (to the trailer side yellow or green), then I do get 12V to the corresponding vehicle side yellow or green and also red.
I am quite new to electronics. I know how to read (most) resistors, I understand function and polarity of diodes, Generally know how to use a meter. I have confirmed that when I do feed the power from the vehicle three wire side (one with red), that I do get 12V to the outside pins on both transistors. But only mV from either center pin.
Any assistance would be most appreciated. If you need me to draw this out I will do my best.
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