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Battery Cable Gauge

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Does anyone know what gauge the positive and neg. battery cables are? (car is an '89 n/a) Im in town getting some new cable and of course I forgot to check and I dont have that car here to reference. :roll: My gut says its 6, but I want to make sure. Thanks!
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According to the wiring diagram in my Bentley they're both 25.0mm2
A little more cross-section (26.65mm2) gives you an AWG 3, while a little less (21.14mm2) gives you an AWG 4, so take your pick.
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