Lynx scout car wiring problems (Ford)

[Tony Wheeler]

Originally Posted by lynx42

What I do not understand is that the mounting bolts earth out the resistance as the mounting bolt goes through the casing of the coil cover which is on an insulated block.....Would that not cause a short circuit?

Never fear Rick, your prized NOS unit will not go up in smoke! Those paired resistors are not ordinary ignition resistors. If you look closely you'll see they use much longer wire, which means far greater resistance. That limits the current flowing to earth. For example, if each one is 10 ohm, the total resistance is 20 ohm, which means the current flowing to earth will be a tiny 0.6 amps (V = IR gives 12 = 0.6 x 20). Of course, as the voltage drops evenly from 12V to zero, you can tap off halfway to get 6V.

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