All I can think of is that a connection somewhere is getting hot after a few seconds switched on. This is consistent with you adding more load and / or waiting longer for the problem to appear.
It's such a bizarre symptom, though. It is either a connection or component that gets hot and then somehow goes high-resistance and cuts the juice momentarily re-starting the cycle.
Good hunting.... !
G
deafanddiabetic wrote:So, tried a few things tonight.
I tried disconnecting the headlight ground and just running the tail light with a ground wire from battery frame connection to the tail light bracket. It would stay on fine until I pulled the brake lamp switch and then it would light for awhile and start it's flickering again.
Next, I disconnected the tail light and tail light switch and left the headlight plugged in.
The headlight did not flicker until I turned it onto high beam, then it began to flicker.
I tried running a ground wire from the headlight bulb socket straight to the battery frame ground as well and it didn't seem to make a difference.
I'm thinking of retracing all of my wiring to see what might not be connected correctly, for all intents and purposes it's connected everywhere as all functions are working correctly.
Well....sort of.