Died at stop sign. No power...?

[BLES]

Mk 3.1 that I bought, not built.
Stopped at a stop sign and it quit. No electrical power in cockpit. (lights, gauges, switches, ignition, fusebox). Battery is good. Anything I can check real quick that relates to feeding power? I'll likely haul it home, but wondering about quick checks. No previous problems.
Thanks.
BLES

[narly1]

Does it have a megafuse right at the battery?

[rthomas98]

I know it typically only controls the fuel pump relay, but did you try the inertia switch? Also does your car have a battery cutoff? Some cutoffs have a key you pull out as opposed to a switch it may have loosened if it has that style.

This is the type I am talking about. The cheap harbor freight ones. Usage over time and they no longer engage right. Good for the lawn mower not for your car if one of these is in there.
https://thefactoryfiveforum.com/attachment.php?attachmentid=151200&d=1627057661

[Avalanche325]

The battery is not the source of power when an engine is running. It is the alternator. Unless the cutout does battery and alternator, that wouldn't stop a running engine.

Is there a mega fuse, or fusible link, in the main harness, that would take out the ignition? Then it would stop and not restart. There would also be no power in the cockpit.

[BLES]

It does not have a battery cut-off. I will try to find a fusible link or mega fuse somewhere. Have never noticed one.

[rthomas98]

If no fusible link is found. I would check the starter solenoid and ignition switch. Those both can have the same effect. Had a mustang that the solenoid ground went and took everything with it once.

[Olli]

FFR was supplying some pretty crappy ignition switches at one point. I had one fail at a gas station once...

[BLES]

Spent a while tracing wires, etc..
Everything is working again but I can't figure out what I did. Almost more frustrating than having it quit. Builder of this car was not into wiring. Body-off rewire may be moving higher up on my to-do list.
Thanks for the suggestions.

[Papa]

Weak chassis ground to the battery? Check for good clean, tight metal-to-metal connection.

[brewha]

I would concentrate on the ignition switch or a loose/bad engine ground. Heat could cause either to temporarily fail. There were some bad ignition switches on the older cars that others have reported. It never hurts to add new engine
ground to the block near the starter. I would be carrying a multimeter with me until you find the culprit. Chasing electrical issues is never convenient.

[facultyofmusic]

BLES, did you ever get this resolved? Really curious as to what happened.