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Old Bastard !
Joined: Fri Dec 22nd, 2017
Location: California USA
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Also keep in mind that the ground wires in a Frame harness and its support harnesses will run back to the cab in circuits like lights or fuel pumps or to the frame itself. The bed is ONLY bolted in through large "speed clips" in the frame, NOT exactly the best "grounded" point of the vehicle. You can get a voltage drop across a negative just as easily as across a positive, keep that in mind while running your ground and what kind of ground you use if you do use a pin-switch and where its terminated at.
Just added $ .02
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Grounding is by far the biggest problem in any vehicle, and running extra grounds back the a terminal buss and then to the battery is one of the most important thing anyone can do. Most of the time my grands for higher powered units are sent back to the Negative (added) Terminal Buss, nothing like a good ground path to keep those electrons flowing.
I add an extra ground from my Starter back to the Battery, that way the starter get all the power it needs and a good ground.
AND don't forget the alternator back to the battery, dirt and rust can raise havoc with grounds.
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Ltr,
2003 EDGE, Std Cab, Steppie, E4 Red, 5sp, 4x
5" SuperLift, 33" x 12.50 x 15"
Hurst Shifter
Mod'd Backrack to fit Steppie
Front and Rear Bumpers by Custom 4x4 Fabrication, OK; now Mike's Welding and Fabrication.
Working on more Mods, just need more time, longer days would work !