Originally Posted by Andrewh
ballast is bypassed during start.
so if it was the ballast you would expect it to start then die when you let off the key.


Not necessarily true. I had a ballast resistor go bad years ago on a '71 Charger & it would start & run just fine, then just cut-out at very inconsistent intervals.

OP, start it & then get out & wiggle the wires connecting to the BR - if it sparks & shuts off, then it's the BR.

No Man With A Good Car Needs To Be Justified