Brake light issue, stumped.

FIRE UP wrote:
SML,
Well Sir, this is REALLY interesting now. Let's see, a third brake light that's supposed to be, according to CC, wired to one or the other, or both, rear brake lights and, the coach has no amber turn signals which, would be ok to wire the third brake light to the existing two brake lights if it did have amber turns.

But, it doesn't have amber turn signals. OK, now, let me ask you this, just how is your lighting situation arranged back there? Do you possibly have separate "Red" turn signals from "Red" brake lights? I've seen some coaches with more tail lights back there than Carter has liver pills. (Way old school joke) (not many would know it)

If so, then you'd have dedicated brake lights that would be unaffected by turn signal operations and THEN you could have that third brake light wired into those.

Now, one poster has commented on the ebrake having an effect on it. Well, yes about 99.9% of the ebrakes will activate the brake lights. Just exactly how it's tied into that regular brake light system, I have no clue. I suppose diodes (even though they, at CC said there was none, switching relays etc. could be involved) all that stuff is light years above me. But, is sure is going to be neat to learn what the cause was/is.
Scott

Scott, each tail light assembly has three bulbs; back up bulb, and two double filament bulbs behind the red lens. Most running light bulbs are single filament but all the bulbs other than the BU bulb are double filament. Strange set up. I plan to ID the driver's side 'stop light' signal wire and run it to the LED. If the LED also lights when I use the left turn signal, I will have to devise an alternate plan. I may call CC back and inquire about the engine brake and the presence of some sort of switching relay. I did discover a circuit board in the engine bay with a dip switch that says '3 wire' and '4 wire' which I belive is a way to adapt output to the toad pigtail to a toad like mine with separate turn sigs. If I can find the original wiring coming from that circuit board, I plan to switch to '4 wire' and connect the LED to the dedicated brake light wire that goes to the Toad. In fact, the dealer has my toad wired so that both the toad brake lights and the amber turn signals come on when brakes are applied so they were either not aware of this feature or too lazy to do what was necessary to wire it correctly.

Getting this figured out and getting my auto gen start module installed is my weekend project. Dang work keeps getting in the way of my hobby!