So, I modified the circuit I found, with some help, and this works, except for one problem.
I'm hoping someone can help me out on this one. I'm stumped.
C1 (470uF capacitor) is there because the turn signals and hazards are connected to the vehicles turn signal switch, which flashes with the relay. I have tried to find a direct connection with a continuous flow of 12 volts from the turn signal switch, and can't find one. If I take out the flasher module, then the front lights on the truck do not flash.
So, C1 keeps power supplied during the 'OFF' times of the flashing, so it will keep Q1 turned on.
The problem I have is that when the turn signal is turned off, the LED's still flash for a few seconds and dims to nothing while the Capacitor discharges, and then finally turning off Q1. This poses a problem. When the brakes or park lamp are activated, they will not turn on Q4 or Q5 until the capacitor totally discharges and turns off Q1, allowing Q4 and Q5 to turn on (depending if brake or park lamp is activated).
Is there a way to fix this? Anyway to discharge the cap quickly so the brakes will activate the LED lights? This could cause on accident if there is a delay in the brake light turning on. I can't place a transistor in there, because it will just turn off and on as the lights flash. I've tried change the values of R4 to 10k, 1k, and 100k. Anything larger than about 30k won't even turn on Q1. This changes nothing, only makes LED's slightly brighter if anything. I've tried changing the values of C1 to 4.7uF, 0.1uF, and 0.01uF and that really screws up the flashing of the LED's and I can't adjust the flashing sequence via R10. So I'm stumped here, can't figure out how to fix this problem.
Also, one other thing, is a resistor needed between the collectors of Q4 and Q5 so that when the brakes are applied while the park lamp is on (the dimmed lights when headlights are turned on), the park lamps will turn off? I'm just thinking if electrons take the path of least resistance, when Q4 turns on, the LED's would ground out through Q4 and not even go through Q5. Or does this not even matter, since the LED's are the same LED's for both operations (no separate LED's). I guess I could just simply move R8 to the collector side of Q5 to solve that problem, if there was one.
FYI, the circuit does work as intended, accept for the problem explained above which I beleive is in part because of C1 capacitor. Other then a couple relays to change the polarity of the input connections, the circuit works fine, so I'd rather not mess with too much if it is not needed to fix the capacitor problem.
I appreciate your help with the capacitor problem. Thanks in advance.
Jason