The Ford switches come in two shapes, but I'm not sure if there are car
specific trip weights. One type of switch has a rectangular white reset
button and the other has a red round button. The switches wire directly
inline with the fuel pump power feed.
Another fuel pump safety system is to use a oil pressure switch from a fuel
injected mid 80's GM car or a GM that has a electric choke. These have
usually have three push on connections. The paralell ones turn on when the
pressure is above ~ 10 PSI, the center one grounds on when the pressure is
below ~ 4 PSI. The fuel pump power can be wired directly as the paralell.
A down side to using a GM switch is that it requires a seperate circuit to
run the fuel pump when the engine is cranking and hasn't built oil pressure.
The circuit would be the same as a ignition ballast bypass in a point dist.
Harold
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