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Reply to "Legacy SD70ACE has dim front lights, bright rear lights - ideas?"

Normally, they're in the manual, but not in this case.  Here's the link to parts, and at the bottom of the page, there's the user manual and a wiring diagram.  The diagram might be useful here.

From that wiring diagram, the common denominator seems to be the ground to the front headlight board.  The headlight and number boards come from two different power sources, if all of them are dim, that's where I'd be looking.

Are the ditch lights and ground lights full brightness?

Thank you for that! Perfect!
All the lights on the front are dim - the cab light, ditch lights, ground lights, number boards, and the headlights. The rear lights - when in reverse of course - are full brightness.  

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