Trailer wiring question

Garth Almgren · 2007-07-17T03:21:47+00:00

So, I just picked up a cheap hitch cover with LED brake light built inthat plugs into the trailer wiring connector. Problem is, it only tapsthe green lead, so the light behaves exactly like the right brake/turnlight 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 RoadmasterHy-Power) to connect both the left (yellow) and right (green) feedstogether and use that as an input for the LED array?My thinking is that when the brakes are on, I've got #1 covered, sinceboth inputs to the diode are giving a solid 12v. When one turn signal orthe other is on, the light will still be getting a solid 12v fromwhichever light isn't blinking, taking care of #2. I'm still good on #3as well, since the diode would protect the left and right circuits frominterfering 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 mythinking so I wouldn't accidentally miss goal #3. :)

Jul 17, 2007 20 Replies

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L.W. (Bill) Hughes III 19 years ago

The third light was required on all Mexican cars in the fifties. Even had a big painted "Stop" in the middle of it. God Bless America, Bill O|||||||O mailto: snipped-for-privacy@aol.com

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