Gary
You can test the coil by using an Ohm meter. Connect the ohmmeter to
the primary studs of the coil. Turn the meter to the 0-2M ohm scale for
the primary winding and check reading then remove either one of the
meter leads from the primary stud and connect it to the coil wire lead.
Reset your ohmmeter to the 2M-20M ohm scale and test the secondary
winding for its reading. If the primary or secondary winding readings
do not fall within the range indicated in the service manual or coil
manufacture, replace the coil. My bet is that the black/white wire is
grounding out as you suggested and would be the first place that I
looked. A bad condenser on the distributor will also cause the coil to
look foul if using a Mallory unit.
Don
57' BN4
-----Original Message-----
From: owner-healeys@autox.team.net [mailto:owner-healeys@autox.team.net]
On Behalf Of Editorgary@aol.com
Sent: Saturday, August 28, 2004 2:35 PM
To: healeys@autox.team.net
Subject: Tests for coil operation
What test(s) are suggested to determine if a coil is bad? Could it be
possible that both coils were bad, or is there some other potential
culprit? (as one
possibility, I suggested disconnecting black/white wire from battery
disconnect/ground at point where it is connected from chassis harness to
main harness,
but he hasn't tried that yet.)
Cheers
Gary
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