look @ battery to engine/& to frame grounds
look at a good Bronco dude did:
Ground Wire Upgrade, using O Gauge Welding Cable pic in an 86 by Sixlitre (Malcolm H, Eddie Bauer) at SuperFord.org
http://www.supermotors.org/clubs/sup....php?id=145060
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Miesk5's Home Page of Big Bronco Links
http://home.comcast.net/~miesk5/