I have removed the coil from my car and want to test it. It is a Lucas DLB 101 12 volt coil from a Jaguar 4.2 E Type. When I touch the red meter wire to + and the black to - I get a reading of 0.9 ohms. When I touch the red meter wire to + and the black meter wire to the coil output I get 5 ohms. Do these readings look correct. I have been reading up about this and I am not sure. Many thanks, John
2007-09-19 11:11:48 · 6 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
Hi Folks, thanks for all your answers so far. I have looked at the little meter I am using and the ohm readings are shown "x 1k". Presumably that makes them 900 and 5000 respectively? Does that make more sense? Regards, John
2007-09-19 20:12:22 · update #1
Jim doesn't know what he's talking about. The DLB101 coil should read around 3 ohms on the windings. .9 is too low. It might be shorted inside. A better test for the output would be ground to output. That should be 10 or 15 thousand ohms..
2007-09-19 12:58:06 · answer #1 · answered by Nomadd 7 · 0⤊ 0⤋
0.9 ohms is to low for the primary on a coil, 3 ohms is normal. First make sure your meter is functioning properly. Many ohm meters have to be zeroed before using them. Is there is a adjustment labeled zero on your meter? If so first touch the probes together and turn the zero adjustment for zero on the meter, then check your coil again.
2007-09-22 03:18:28 · answer #2 · answered by austin j 4 · 0⤊ 0⤋
Should measure 3 ohms in either direction. Before you replace your coil, try checking it with a different meter.
2007-09-20 12:22:56 · answer #3 · answered by anywherebuttexas 6 · 0⤊ 0⤋
it could be correct,
the problem is that internal shorts between turns will show up as very tiny changes in resistance not measurable with a meeter like that.
you results seem good,
I would think it should run like that.
if it is running poorly, then check to see if the coil is getting really hot, because it getting hot is a sign of internal shorts between windings.
2007-09-19 11:18:03 · answer #4 · answered by sweety_atspacecase0 4 · 0⤊ 0⤋
No. Those readings don't sound right at all. This is the ignition coil? You should get readings of Million Ohms. The coil is comprised on huge windings of wire and since there is so much there is a lot of resistance.
2007-09-19 11:21:21 · answer #5 · answered by Jim 3 · 0⤊ 5⤋
Yes it's actually two coils, one collapses the field upon the other.
2007-09-19 11:15:57 · answer #6 · answered by Anonymous · 0⤊ 0⤋