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Author Topic: Negative Ground  (Read 1749 times)

Offline bryancobb

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Negative Ground
« on: July 18, 2011, 10:38:15 PM »
OK...on my MAR 66 C-Code Metuchen Convertible...
The engine/transmission assembly sits on three rubber blocks.  The driveshaft-to-rearend-to-springs is isolated also by rubber.

The negative(-) battery cable is bolted to the right motor mount bracket that bolts to the shock tower, which is not connected to the engine, electrically, except by that little ground strap at the firewall to the back of the block.

Isn't this right?

When I turn the key to start, isn't that little ground strap a little light duty for all that current the starter needs? 
It would make more sense to me for the negative battery cable to connect to that stud-bolt behind the alternator, that the transmission coolant line clip is bolted with??
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66 Metuch Conv
Nightmist, Std Blu Int
6T08C223904    76A       K         22       15c     21      6        6
                      BODY  COLOR   TRIM    DATE   DSO   AXLE  XMSN
   C/O  785                                   (rotation #)
   16    C14   6T08C223904        (weld bay 16, bucked MAR 14)

Offline carlite65

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Re: Negative Ground
« Reply #1 on: July 18, 2011, 10:46:04 PM »
it goes on that stud you mentioned.
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Offline bryancobb

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Re: Negative Ground
« Reply #2 on: July 19, 2011, 06:47:37 AM »
OK.  I would have sworn the Osborne book showed it on the motor mount bracket?
I'll look again.
Thanks
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66 Metuch Conv
Nightmist, Std Blu Int
6T08C223904    76A       K         22       15c     21      6        6
                      BODY  COLOR   TRIM    DATE   DSO   AXLE  XMSN
   C/O  785                                   (rotation #)
   16    C14   6T08C223904        (weld bay 16, bucked MAR 14)

Offline bryancobb

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Re: Negative Ground
« Reply #3 on: July 19, 2011, 12:48:39 PM »
Does the star washer go first, against the block, then the (-) battery cable, then the alternator ground eye, the the stud, then the transmission cooling lines, then a lock washer, then the nut?
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66 Metuch Conv
Nightmist, Std Blu Int
6T08C223904    76A       K         22       15c     21      6        6
                      BODY  COLOR   TRIM    DATE   DSO   AXLE  XMSN
   C/O  785                                   (rotation #)
   16    C14   6T08C223904        (weld bay 16, bucked MAR 14)

Offline tomtri66

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Re: Negative Ground
« Reply #4 on: July 19, 2011, 04:06:38 PM »
+1 on the mounting on the stud.  Not sure of the order though.
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66 Metuchen HT Sprint 200 Package B
6T07T194XXX   65A       Y       22     20A     ?        2       6
                    BODY  COLOR  TRIM  DATE  DSO  AXLE  TRANS
C/O    762
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Offline Bob Gaines

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Re: Negative Ground
« Reply #5 on: July 19, 2011, 05:14:30 PM »
Quote from: tomtri66 on July 19, 2011, 04:06:38 PM
+1 on the mounting on the stud.  Not sure of the order though.
The star washer is always supposed to go against the block so it can dig in through any paint to make good ground contact. This can apply to various other ground areas (star washer first)on the car that receive a different size star washer. Sometimes they are put on in a different order by mistake. Bob
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