Annoyed! Left turn signal keeps blowing fuse

multi function turn signal switch

 

"Left signal pops", what happens with the flashers on? Did you check the trailer connector? "The column switch seems ok." Disconnect the switch from the harness, use a jumper wire for hot and ground if necessary and then operate the left turn signal and see what happens at the output for the left signal. "So at this piont im realizing that it has to be a broke wire or pinched wire somewhere..." Why could it not possibly be the switch?
Are you sure that the harness runs direct from the front or rear lights to the switch? I know it looks that way in the diagram posted. On newer KW or Pete tractors there are 3 harnesses connected together from the headlights to the chassis node, at least 2 harnesses from the rear/tail lights. You don't have a node but my point is that there are likely harnesses connected and they can be separated to try to isolate the problem.

 

I would check the up front near the hood hinge. After opening and closing the hood for 24 years, it's just like bending a wire back an forth with your hands. I've seen it before a perfect place to chase a gremlin.

 

I had a issue one time with trailer cord causing that . It took awhile to figure it out . Corrosion caused power to jump .

 

Just a few random thoughts to help.

does it blow a fuse when you applied the brakes?

do you have any added lights like a turn signal light on the mirror?

is there a plug for the harness going to the hood?

if so have you disconnected it and see if there is a short?

have you removed the bulb in the front turn signal unit?

 

^^^^^^^This^^^^^^^
Unplug the Trailer Cord & see if It still does It..!! & also check the Female Plug on the Truck..

 

I had an LED bulb short out. Never thought it could happen, but it did. Water got in it and the corrosion created a bridge.