Yesterday I cleaned the battery posts for my car. Took each one off and
wire brushed inside the clamp and the battery post itself. I
reconnected the battery and everything seemed ok. That is until I went
to set the alarm. It doesn't work any more and it is getting power.
Apparently, removing the battery post and reconnecting it caused a
voltage spike that was large enough to wipe out the alarm system. When
I was working on it I could hear a relay click, probably from the fuel
pump. So, making and breaking the DC supply caused a spike from the
collapsing magnetic field around the relay core.
So, a word of warning is in order I think. Unplug or turn off you MD
equipment before you take your car in for any kind of service where
they may be disconnecting the battery, or if someone is going to give
you a jump start when cold weather hits.
Hopefully, it is designed well enough so this won't be a problem, but
better safe than sorry. I certainly would have thought an alarm company
would have taken that into consideration, but I guess not.
--
Jim Coon
Not just another pretty mandolin picker
mailto:[EMAIL PROTECTED]
If Gibson made cars, would they sound so sweet?
My first web page
http://www.tir.com/~liteways/
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