Does the alternator need to be grounded? - Chevelle Tech

Electrical & Wiring Troubleshooting electrical problems.

 
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post #1 of 5 (permalink) Old May 27th, 09, 6:53 PM Thread Starter
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Daniel
 
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Does the alternator need to be grounded?

Hey guys, looking at my charging system, and getting this thing back on the road. I dont remember if the GRD post on the alternator actually needed to be directly grounded to something. I seem to almost remember a strap or wire going from that post up to a bolt on the alternator bracket itself maybe?

Could someone refresh my memory on this, been trying to look at pics of other guys engines, and its hard to tell if there is another wife back there most of the time. BTW this is externally regulated if that matters. Thanks!

-Daniel

1970 Chevelle - Best time at the WCCG 12.749 @ 108.606, 2.011 60' on street tires!

427 BBC, 215 heads, 2.19/1.88 valves with some port work, 60212 Lunati Hyd Roller, 3310 Holley 750, Performer RPM intake, TH350 with shift kit, 3.55 gears 12 bolt posi, Pypes 3 inch kit, it's alive... again!!!
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post #2 of 5 (permalink) Old May 27th, 09, 7:25 PM
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Joe
 
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Re: Does the alternator need to be grounded?

No, you don't have to connect anything to the "ground" post on the alternator. It gets its ground thru the case and the mounting bracket. As long as the bolts are tight, and brackets/mounts are corroded, it will work fine.

-If you don't stand for something, you'll fall for anything.
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post #3 of 5 (permalink) Old May 27th, 09, 7:53 PM
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Brian
 
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Re: Does the alternator need to be grounded?

Just make sure you have the negative side of the battery grounded directly to the engine block itself and you should be fine....

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post #4 of 5 (permalink) Old May 28th, 09, 11:10 AM
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mark
 
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Re: Does the alternator need to be grounded?

Not sure if yours used the ground or not. The alt needs to be grounded but if the mounting is metal to metal and not painted over you won't need it. Some ran a ground wire from the alt post to the reg. If you do find another wife back there in the pictures, you better not let the other wife see it.
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post #5 of 5 (permalink) Old May 28th, 09, 2:42 PM Thread Starter
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Daniel
 
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Re: Does the alternator need to be grounded?

Quote:
Originally Posted by stellar View Post
If you do find another wife back there in the pictures, you better not let the other wife see it.
Lol, i totally missed that when i first typed it. I dont think she would be too happy if i found another one!

1970 Chevelle - Best time at the WCCG 12.749 @ 108.606, 2.011 60' on street tires!

427 BBC, 215 heads, 2.19/1.88 valves with some port work, 60212 Lunati Hyd Roller, 3310 Holley 750, Performer RPM intake, TH350 with shift kit, 3.55 gears 12 bolt posi, Pypes 3 inch kit, it's alive... again!!!
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