A buddy of mine has a Lincoln mark VII in good condition he wants to sell
(cheap too). It sat for several months and the battery was dead. He
charged it and went to start the car. It will start and run, but only if he
holds the key forward. Any ideas? I am thinking either a bad switch or a
bad relay. Is there anyway to bypass the switch to test if it is bad? I
was expecting a series a relays under the hood, but he says he can't find
it. Where are they located?
Thanks for the link. I should have also mentioned nothing accessories such
as the radio will power on with the key in the forward position or the
accesory position. The radio, etc is dead. Lights still work okay.
The radio will not work with the key in the crank position. When he cranks
it and it starts he can put it in gear and the starter will stop. If he lets
go of the key, returning the ignition switch to the run position, the engine
dies and the radio comes on. Sounds like a bad ignition switch, in an old
car I would look at the ballast resistor.
Look at either the switch or the run circuit. There are two circuits for the
ignition system. When you turn the key to start is one. then when the engine
starts and you release the key to the run position is the second. That ( the
second ) circuit has a resister in it, and can sometimes go open. If either is
bad of the ignition switch is misadjusted you will get condition you describe.
The Haynes manual has a pretty good schematic.
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