Re: Neg. battery cable?
[Re: D_C]
#464149
09/09/09 10:26 PM
09/09/09 10:26 PM
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Anonymous
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Anonymous
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Quote:
Technically, the grounding "should" pass through the Engine then through the motor-mounts into the chassis,
Deleted prior to arrival of politically biased moderators
Last edited by 440sixpack; 09/15/09 12:23 AM.
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Re: Neg. battery cable?
#464150
09/09/09 11:24 PM
09/09/09 11:24 PM
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Joined: Mar 2005
Posts: 1,373
Rancho Cucamonga, CA
D_C
pro stock
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pro stock
Joined: Mar 2005
Posts: 1,373
Rancho Cucamonga, CA
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Quote:
Quote:
Technically, the grounding "should" pass through the Engine then through the motor-mounts into the chassis,
Uh, NO
ALL manufacturers have a jumper from the frame/ body/ unibody to the block/ battery neg.
Motor mounts don't ground anything.
Uh, YES
What I was responding to is this quote, recommending an ADDITIONAL grounding strap between the Engine and the Chassis:
Quote:
Make sure that you also have a ground from the rear of the head/intake area to the vehicle fire wall.
I have reviewed the Factory 1971 Dodge Chassis Service Manual, Electrical Section, Grounding, and the actual vehicle itself, and there is NO grounding strap between the Engine and Chassis.
There is a Grounding Cable between the Engine and Negative Battery Terminal, and a 10-gauge wire between the Negative Battery Terminal and the Chassis, but None between the Engine and Chassis.
That said, I do have a 1979 Jeep that DOES have an actual grounding-strap in addition to the Negative battery cable connection, but not ALL vehicles came with grounding-straps between Engine and Chassis in addition to the Negative Battery Cable connection.
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Re: Neg. battery cable?
[Re: D_C]
#464151
09/10/09 12:46 AM
09/10/09 12:46 AM
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Anonymous
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Anonymous
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Deleted prior to arrival of politically biased moderators
Last edited by 440sixpack; 09/15/09 12:23 AM.
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Re: Neg. battery cable?
#464152
09/10/09 01:14 AM
09/10/09 01:14 AM
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Joined: Mar 2005
Posts: 1,373
Rancho Cucamonga, CA
D_C
pro stock
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pro stock
Joined: Mar 2005
Posts: 1,373
Rancho Cucamonga, CA
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In my initial post reply I said that: Quote:
Aluminum is a Good conductor
(referring to the Battery Negative Cable attachment to the Mopart's member's Aluminum Heads.)
Primarily the main-ground is the Cable attached between the Block, or Water-Pump, or Cylinder-Head and the Battery Negative Terminal.
Then, another post from "MoparforLife" (having read in the initial post, "things seem to be quirky with electrical now") suggested:Quote:
also have a ground from the rear of the head/intake area to the vehicle fire wall.
I was simply agreeing with that thought, an additional ground strap. I never mentioned "Starting" in my reply and my agreeing with the Additional Ground Strap was to help with secondary electrical needs, and not dealing with the Starter-Elecrical at all.
In addition, either the Factory (or through a subsequent replacement) the Negative Battery Cable is sometimes under-size or small diameter (can't pass enough current,) or the cable itself may have corroded internally, or eventually it winds up with a bad connection due to corrosion at the bolt connection.
In that instance, current can instead pass through the starter into the block then through Motor-Mounts, the Transmission, the Drive-shaft, etc, all back into the chassis and back to ground/negative battery terminal.
Adding an additional dedicated grounding strap between the engine and chassis provides an additional path should there be a problem with the Primary Ground Cable between the Engine and Negative Battery Terminal, or if the "pigtail" connection fails at the chassis, for everything else electrical on the vehicle to ground back to the Negative Battery Cable.
Some vehicles come from the Factory with this "additional ground strap" (between engine and chassis) and others never had one.
Motor Mounts were never intended to act as a Primary Ground, but if the Negative Battery Cable Attachment Fails, the electricity seeks another path, that's all I intended.
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