I just got a tractor, and I noticed the red lights aimed towards the rear were not very bright,,
(this check was done with the engine not running)
I checked the voltage at the light,, 10.5 volts
I checked the voltage at the battery, 12.5 volts,,
There was a 2 volt drop from the front of that tractor, to the rear.
I think most of the drop is due to the tractor having SO MANY lights,, and most of them are filament type lights.
By changing 4 of the filament type lights to LED,, the voltage went up to 11.5 volts at the light.
That was better, PLUS the LED type bulbs are at least 4X brighter.
The light level seems to stay the same, not changing if more lights are turned on, or the engine started.
So, I do not think these tractor companies are wasting much money on excess copper in these wiring harness assemblies,,
