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Re: Electrical ?
On the firewall, behind the engine on the passenger side is a bulkhead connector. it will have these wires coming out of it on the engine side:
Dark Green -- goes to temperature sending unit
Light Green -- IF you have indicator light in dash -also goes to temp sending unit
Dark Blue -- If you have indicator lights in dash- goes to oil pressure sending unit
Purple -- to START terminal on starter(closest to engine block)
White-cloth covered(usually brown from years of wear) this is the resistance wire to the + side of coil should show less than 12V+ with key "ON"
You will also have a yellow wire from the RUN terminal of starter(outer most small terminal) to the + side of coil- this will only have 12V_ power while engine is cranking
Check for power at the coil + with key on -- it best to use a voltmeter than test light. It should be less than 12V. If nothing- then unplug connector on firewall and test the corresponding terminal on the firewall side for 12V+. If there is 12V, then your resistance wire is bad. If there is not 12V+ then your problem is between the ignition switch and the connector- that will be in the pink wire from the connector, on the inside of firewall to the ignition switch.
It is possible that the coil itself, could be breaking down internally, but will work when supplied with a full 12V.
Let us know how things test.
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