Elec woes, crank, no start after running then parked.

Thanks Del, much appreciated, yes extremely annoying. I knew there was a "tap test". Just forgot exactly "how"
I always tell myself to make a "check list" and laminate the f'r and put it in with the emergency kit.
Meant to add remote starter to kit as well, handy for cranking engine while under hood.
That "emerg " system u made, is it for troubleshooting or to "get u home"?
If I wasn't such a stupid purist I may just use the hidden HEI that u and @TrailBeast mention.
Gonna download 71 service manual to get oem specs for coil and br(hopefully)
HI Steve. Always annoying, right? On the side of the road.
You need to set up so you can determine "if spark."

The wiggle the dist. connector may be a clue, or it may have just been happenchance. That connector is very vulnerable to corrosion, loose connection, so try and clean it. I'm pretty sure that a .177 rifle brush will get inside those connectors. AKA "BB caliber"

As suggested, I'd rig up a couple of jumper alligator leads, and a test gap so you can pull the coil wire, sub your test gap and test for spark. Rig a gap, jumper power to the coil+ jumper the starter relay, and look for spark.

Don't forget the old test---with either key on or power jumpered to coil, separate the dist pickup connector and take the engine bay harness end, and tap the bare terminal to a ground. Should make one blue snap spark at the coil each time. This will eliminate the dist. as a problem

As usual, wiggle test the system connectors and make certain the ECU is grounded.

AFter that it is a toss up. If the ballast is good, and as above you can jumper it temporarily, then it's a toss up. If you don't get spark with the "tap the connector" test, then it's either the coil or ECU probably

I just cannot TELL you how handy the "emergency" system I put together has been for stuff like troubleshooting and firing up / testing engines. 4 pin HEI modul, and old coil and a couple of alligator leads

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