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Years ago , I actually made a battery load/draw tester using an old section of heater element from a cloths dryer...I wired a V meter across the element and hooked up battery cable ends to it...you hooked the bat cables to the car battery and watched the V meter drop, then see if it returned right away after you unhooked the cables ..used it for years until they finally started making the heater one we are all so familiar with now..
I also got one at a sale for a buck that had a bad meter, but the heater was still intack and the cables/chassis was still good..so I just put 2 meter leads female jacks in place of the shot meter so you use the tool for applying the load, but the V monitoring is done by simply plugging your DMM into the jacks ...slick..........
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A Dalton
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