ballast resistor problem

beerboy said

car has never been in rain or wet weather always garaged. its a 4 prong out of a 73 duster. we went to a store not far at all. we were gone maybe 25 minutes cranks but no start , change to the spare resistor --brand new and starts right up, i have been to cruise nights where the car sat for 2-3 hours and never a problem , that would give a cool down time .i will do some testing and check the coil,coil or resistor maybe getting to hot; like i say i very rarely drive the car for a short stint then go to start it till i am home which tells me it could be a heat problem . car is driven brought into my garage shut down then runs again a few days after

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NOW you tell us. You NEED to tell people "the whole story" and the year make model. ALWAYS

1....A 4 pin is only needed if the ECU is the older "5 pin" box. You can NOT tell if a box is 4 or 5 pin by looking at the connector. Some newer, 4 pin poxes have 5 physical pins. Have you CHECKED CONTINUITY of the resistor?

2...Make CERTAIN the resistor is wired correctly, as they are actually two DIFFERENT VALUE resistors. The "U" cutout on one end is to correctly orient the assembly in the connectors, so that it has the correct value resistor to the correct circuit.

3...IT IS POSSIBLE that you have a problem in the bypass circuit rather than the resistor itself.

HOW HAVE YOU determined that these are bad?