[DML] Re: Bad alternator?
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[DML] Re: Bad alternator?



It can be difficult to find the exact spot where you have a "bad
ground". The way to approach this problem is to just clean ALL the
grounding points. In many cases most of the weird or mysterious
problems will go away. For the remaining ones it will be easier to
diagnose and troubleshoot. The part that makes things weird is many
circuits may ground at the same point. If they are not grounded well
backfeeds on the ground wires to the other circuits can cause some
interesting effects! It is not always possible to see the voltage on a
ground wire. Especially if it is grounding through another circuit. In
Deloreans, since they are British, many circuits are controlled by the
"ground" side of the circuit. IE, the load is hot at all times and
does not operate till grounded. When another circuit can't get to
ground it can "back up" or backfeed into another circuit and it's
load. Things like turn signals in particular need good grounds to
function properly.
David Teitelbaum
vin 10757


--- In dmcnews@xxxxxxxxxxxxxxx, Marc Levy <malevy_nj@xxxx> wrote:
> When checking for bad grounds, I find it is easier to
> look for voltage..  More accurate too.
> 
> In the DeLorean, for example...  Put all of the
> accessories on.  Then, check the voltage from the
> negative post on the battery to the inside seat belt
> bolt.  If you have a volt or more reading, than there
> is a bad ground between the battery and the frame.
> 
> You can do the same test (with longer meter leads)
> 






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