Turning Signal Problem on 03 Avalanche

[GeToChKn]

Found a cheap flasher module, replaced that, it's not that. So it's either a ground somewhere, which I'm not too sure about as I've had ground problems before in other vehicles and it's usually always an erratic behavior, like turning the left or right blinker on would turn on the abs or traction lights, or only blink fast when the brake pedal was pushed or one side would blink fast or the front would and the instrument panel normal, but all 6 bulbs have been replaced and they blink very fast when left or right is engaged, and normal when the hazards are on.

 

/stumped

[GeToChKn]

So we bought a trailer, hooked it up, first the lights went wacky, took apart the towing harness and cleaned it, now the lights work at regular speed with the trailer hooked up, but still fast when take the trailer off. :S

[GeToChKn]

Turned out to be a small shorted wire somewhere around the fusebox and flasher area. Brought to it an auto electrical guy, $250 later, he found it fix, fixed it, turning signals blink normal, trailer works, all is good in life. PITA. lol. Wasn't bulbs, wasn't flasher, everything grounded out, just one little kinked or messed up wire.