Help- both turn signal indicators turn on when lights are on

[speedygonzales]

Originally Posted by JetForceF22

I have a inkling that the harness ground that goes to my dimmer switch might have something to do with it.

Pretty certain you don't have a ground going to a dimmer switch if it's not a lighted type of switch.

Originally Posted by JetForceF22

Either way, when I disconnected the marker lamps the indicator lights in the dash turned off, so for the moment they are disconnected.

That with what you said earlier, is an indication that the indicator bulbs don't have a good ground and are getting the ground (so to speak) through the marker lights.

Originally Posted by JetForceF22

It is worth noting though that I don't recall ever having this issues with this prior to the truck sitting.

Another indication of missing grounds.