On 25 Aug 2009 at 17:49, thenicholls@verizon.net wrote:
> If I select volts and attach the two leads to where the bulb plugs
> in, it should show something if it is getting power, and nothing
> if it is not getting power, correct? I don't want to fry anything.
If the meter isn't broken it won't blow anything, so don't worry
about that. If you have the wires attached backwards, the meter may
try to jump backwards if it is a needle and meter display, or the
digital display may show a negative voltage, but that's okay too.
If you just have a burned out bulb, you should see voltage between
those terminal. But maybe you won't see any voltage at all. It is
possible the wiring isn't right and the bulb is fine, or both could
be a problem. For example, the ground side (i.e. the "negative"
side) may simply have a poor connection to ground. I don't know what
the TR6 trunk switch is like, but the one on my Spitfire sometimes
just doesn't make good contact to ground unless it it is jiggled a
bit. A problem like that would make the reading be zero. Maybe you
don't even know which terminal is positive and which is ground. So
another test is to attach the meter's negative wire to a good chassis
ground, not paint, then touch the other wire to each of the terminals
in the light socket. When you touch the positive side the meter will
show it. If neither side shows a positive voltage and you are
absolutely sure your ground connection is good, then the problem is
in the wiring that feeds power to the socket.
--
Jim Muller
jimmuller@rcn.com
'80 Spitfire, '70 GT6+
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