Do I need to run a ground wire from the engine block to firewall in addition to the one from the vr to alternator bracket. I'm installing a new vr on my truck this weekend and want to make sure I get it right. Thanks in advance, Sam

The more grounds the better (I guess?). It shouldn't hurt any thing.

Richard

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Part of Tyrde-Browne Racing

Mine is grounded that way, with dual grounds.
I actually go to the ground stud on the alternator from the VR.

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Aggressive Ted

http://cid-32f1e50ddb40a03c.photos.live ... %20Swinger


74 Swinger, 9.5 comp 254/.435 lift cam, 904, ram air, electric fans, 2.5" HP2 & FM70 ex, 1920 Holley#56jet, 2.76 8 3/4 Sure-Grip, 26" tires, 25+MPG

Ok all the talk on grounding the alternator, mine has a prong for a ground but no wire to plug into it. Do I just run a wire from the mounting bolt on the VR to the ground prong on the alternator?

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1964 Dodge Dart 270 four door. Three speed automatic 225 Slant with a Carter BBS carb.

Voltage drop can manifest in both sides of a circuit, and ground side of any circuit is the easiest to correct for any voltage drop. Like Ted, I have a ground loop that picks up chasses of alternator, voltage regulator, orange box, and back to battery negative terminal. There is zero voltage drop in this loop because it bypasses all suspect connection points between block, body, body welds, and battery.

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67' Dart GT Convertible; the old Chrysler Corp.
82' LeBaron Convertible; the new Chrysler Corp
07' 300 C AWD; Now by Fiat, the old new Chrysler LLC