From the Workshop: Automotive Electrical Systems
Making your own battery cables is relatively easy, but there is a vast difference between simple bolted terminals and crimped or soldered connections. Most farmers experience the frustration of a flat battery or poor starting engine on a regular basis. A sluggishly-cranking engine often appears to be caused by a flat battery, but in fact can be poor battery cables, or dirty battery terminals. Corrosion, damage or loose connections inhibit current flow from the battery to the starter motor when it is needed most.
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Crank up the amps with DIY Battery Cables