What could be the wiring problem?

1983 MERCURY COUGAR
13,900 MILES
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KIMZIMMERMAN
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My 1983 Mercury Cougar won't start unless you take a test light, hook it up to the battery and then take the test part and touch the coil. It will then start. You can start it several times after that and then it will go back to the same thing. Then you have to use the test light again to start it. In what part of the wiring could be bad causing this?
Oct 6, 2011 at 5:54 PM
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CJ MEDEVAC
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KEY "ON"---HOOK TEST LIGHT TO GROUND----TEST POS SIDE OF COIL WITH TEST LIGHT

RESULTS?

THE MEDIC
Oct 6, 2011 at 6:41 PM
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FIXITMR
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coil should have 12v when you turn key on. how old is ignition switch?
Oct 6, 2011 at 6:48 PM
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