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My mistake, I was thinking of the coil measurement.
But you still don't need to disconnect the battery to measure the =
ballast resistance, in fact because of the way some ignitions are wired =
that would prevent you measuring it anyway, as the battery may be needed =
to operate an ignition relay to connect the coil feed wire to 12v.
As long as the wires are removed from the coil to stop any current =
flowing you can measure resistance on a wire that is carrying 12v, for =
the same reason that birds can sit on a 400kV power line.
PaulH.
----- Original Message -----=20
Are we on the same page? The way I read it, it was a resistance =
measurement from the coil positive wire to the white or white/brown wire =
on the fuse box, with the ignition switch turned on, in order to find =
out if there was a ballast wire in the coil harness. I wouldn't attach =
my ohmmeter to a hot circuit.
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<DIV><FONT size=3D2>My mistake, I was thinking of the coil=20
measurement.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>But you still don't need to disconnect the battery =
to measure=20
the ballast resistance, in fact because of the way some ignitions are =
wired that=20
would prevent you measuring it anyway, as the battery may be needed to =
operate=20
an ignition relay to connect the coil feed wire to 12v.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>As long as the wires are removed from the coil to =
stop any=20
current flowing you can measure resistance on a wire that is carrying =
12v, for=20
the same reason that birds can sit on a 400kV power line.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>PaulH.</FONT></DIV>
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PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV><FONT size=3D2></FONT><FONT size=3D2></FONT><BR></DIV>Are we on =
the same=20
page? The way I read it, it was a resistance measurement from =
the coil=20
positive wire to the white or white/brown wire on the fuse box, with =
the=20
ignition switch turned on, in order to find out if there was a ballast =
wire in=20
the coil harness. I wouldn't attach my ohmmeter to a hot=20
circuit.<BR></BLOCKQUOTE></BODY></HTML>
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