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Re: OT - More Mack truck trailer wiring - longish
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Posted by Dave (IL) on June 05, 2005 at 15:26:06 from (24.15.101.212):
In Reply to: Re: OT - More Mack truck trailer wiring - longish posted by J. Schwiebert on June 05, 2005 at 10:20:28:
The 1970 Mack R700 has positive ground just like my MGA and my Farmall H. The trailer has a small 12v battery to power the safety brakes that is wired to get charged from the tow vehicle. It can't be completely isolated as the grounds on the trailer are tied into the chassis. I don't have the specifics on the Mack alternator. I just looked at it quickly to see that it was an alternator.
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