Help Firing Dad's Dart up Again - SOS - No Spark After Hosing Off the Dust

The interlock "I don't think" has anything to do with spark. I believe it only cuts out the start signal from the key to the starter relay

There are two yellowish wires going to the reset box under the hood. Splice those permanently together

The blue box is under the dash. What you are looking for is under the hood, either on the firewall or fender apron. Has a reset button sticking out

This is what you are looking for

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