So, I just picked up a cheap hitch cover with LED brake light built in that plugs into the trailer wiring connector. Problem is, it only taps the green lead, so the light behaves exactly like the right brake/turn light and blinks when I'm signaling right.
My goals are as follows:
1) Have the hitch light be on when the brakes are on. 2) Have the hitch light NOT blink when either turn signal is on. 3) Not damage my Jeep's electrical system in any way.The question is this: Can I use an isolating diode (like the Roadmaster Hy-Power) to connect both the left (yellow) and right (green) feeds together and use that as an input for the LED array?
My thinking is that when the brakes are on, I've got #1 covered, since both inputs to the diode are giving a solid 12v. When one turn signal or the other is on, the light will still be getting a solid 12v from whichever light isn't blinking, taking care of #2. I'm still good on #3 as well, since the diode would protect the left and right circuits from interfering with each other.
I think I've got this right and was just going to start experimenting, but first I wanted someone with more electronics experience to check my thinking so I wouldn't accidentally miss goal #3. :)