If the points are open you will see 12v on both terminals of the coil
regardless of whether it is a 6v coil that needs a ballast or not or whether
you have a ballast resistor or not..
If the points are closed you will see 0v on the points terminal of the coil
for all combinations.
With the points closed and a non-ballasted circuit you will see 12v on the
ignition terminal of the coil, regardless of whether it is a 6v coil or a
12v coil.
With the points closed, a ballasted circuit and a 6v coil (which needs a
ballast) you will see about 6v on the ignition side of the coil.
With the points closed, a ballasted circuit and a 12v coil you will see
about 9v on the ignition terminal of the coil.
The only way to check if you have a 6v coil (which needs a ballast) or a 12v
coil on a non-ballasted circuit is to check the part number of the coil or
to measure its resistance - a 12v coil should measure about 3.5 ohms and a
6v coil about 1.5 ohms.
PaulH.
http://freespace.virgin.net/paul.hunt1/
-----Original Message-----
From: Derek <v8man@dwatson.free-online.co.uk>
To: Mgbreh@aol.com <Mgbreh@aol.com>; mgs@autox.team.net
<mgs@autox.team.net>; mgccnwc-list@eskimo.com <mgccnwc-list@eskimo.com>
Date: 24 March 1999 08:21
Subject: Re: BGT runnin bad kinda long sorry
>check the volts outa the coil and at the points if they keep closing. If
its
>9V instead of 6v you have put on a ballasted coil and dont have a ballast
>resistor in line... took ages to figure out when this happened on a car I
>built a few years back!
>
>Derek
>74 b
>Scotland
>----- Original Message -----
>From: <Mgbreh@aol.com>
>To: <mgs@autox.team.net>; <mgccnwc-list@eskimo.com>
>Sent: Tuesday, March 23, 1999 6:58 AM
>Subject: BGT runnin bad kinda long sorry
>
>
>>The bgt suddenly the tach went wacky &it lost all power & would not
>restart.
>>So i walked 2 1/2 till someone from work picked me up of coarse it was
>raining
>>after all i live near seattle. The car has been acting up lately it would
>not
>>idle & missed sometimes. So afterwork ( yesturday this happened) I had
>put a
>>used ford coil out of my newest b ,this cured the previous no idle run
>rough
>>ploblem. So i thought the coil had died so i got a new one it didnt help
>the
>>points wernt opening so i ajusted them & away iwent for 1/12 miles till it
>did
>>it again. This time i reajusted the points it started right up Then ran
>badly
>>again, so i double cheched they wereclosed again bye now it was gettin to
>be a
>>hour1/2 till dark the road was very desolate the wife was with me so i did
>not
>>have to walk. We flagged down a cop who called a tow truck So its home &
>yes
>>David i tipped him he was really cool. So tonite i put in the old dizzy
>that
>>worked well in my 76. So i put in a proven dizzy & a NEW coil get it
>started
>>set the timin & boom it runs great!! i let it run 10 min or so & went for
a
>>test drive the car worked great till i turned around it started missing At
>>3500 -4000 in 3 gear it started buckin & backfirng i barelly made it home.
>Oh
>>by the way the bushings in the old dizzy were junk it wobbled really bad!
>The
>>timing is still right on the dwell is within spec when it runs it fires up
>&
>>almost dies right away it spits & backfire as it turns over only
sometimes
>>Any ideas ??????
>>
>>Ray Huff
>>
>
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