RE: [DML] Re: 3 post idle microswitch

["DMC Joe" <dmcjoe@xxxxxxx>]

I would like to back up David on this subject. As another example, in most
instances the idle speed micro switch will click even thought the internal
contacts or damaged. In some cases a fuse may look OK but actually be bad. I
could give many more examples but the point is the same. The engine has many
test tools, anything from cooling system pressure testers, to timing lights,
to fuel system test kits. The electrical system only requires one test item;
it is easy to use, inexpensive and available everywhere. Repeating David's
words:

<"Anyone working on a car (including DeLorean's) ought to get to know a
multi-meter and how to use it.">

DMC Joe
 

-----Original Message-----
From: David Teitelbaum [mailto:jtrealty@xxxxxxxxxxx] 
Sent: Sunday, January 23, 2005 11:41 PM
To: dmcnews@xxxxxxxxxxxxxxx
Subject: [DML] Re: 3 post idle microswitch




What I meant was that he shouldn't worry about where to connect the wires.
As long as he used the common terminal for one of the wires he will figure
out which other terminal to use. Obviously it has to be either the NO or the
NC terminal (I wasn't going to make it so easy for him). If he took 5
minutes with a multi-meter he wouldn't have had to post the question in the
first place. Sometimes giving the direct answer is not the "best" answer.
Anyone working on a car (including
Deloreans) ought to get to know a multi-meter and how to use it. Then maybe
he might be able to tell if the old switch was really bad before he ordered
another one. You are correct that it is a simple single pole double throw
switch electrically and it should be wired to the NO terminal and the
common. In any case he should check the old one and after installing the new
one it too should be checked. Sometimes even when a micro clicks and you
think it tripped inside it may be bad and not make contact. The only way to
know is with a multi-meter. One of the causes of a bad micro is hitting the
switch too hard with an out-of-adjustment screw. It should just trip the
switch and then maybe a 1/4 turn more. Another cause is tightening the
hold-down screws that fasten the switch to the bracket too tightly. This
type of micro is rated for cycling in the millions, they generally last a
long time if installed properly ( they do fail though but not frequently).
David Teitelbaum
vin 10757








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