Total electrical failure

[Frankr]

I drive my 69 911 at least weekly with no issues. Went out to start it and NOTHING. Battery is fine. Is there some master system failure point in the ignition switch or elsewhere?? By nothing I mean no horn, lights, no nothing.

[sithot]

1st- Check all grounds.
Battery to body grounds have been known to corrode.

[Cliff]

Battery...............start with the easy fixes, as I`ve been told several times

[RSTarga]

Ignition switch electrical portion at back of switch. That or the switch itself. I had that failure and replaced the entire mechanism as the lock was getting weak too.
Good idea to start with the battery.

[eaton]

Exact same thing happened to me a few weeks ago. Spade connection off post on starter solenoid. Took me quite a while to find that one.

[classic]

I've had problems with the relay that the start switch wiring loom connects to.......found next to the flasher relay........in my 69 which gave the same symptoms that you describe.

[Frankr]

I've had problems with the relay that the start switch wiring loom connects to.......found next to the flasher relay........in my 69 which gave the same symptoms that you describe.

Battery and cables are known good. This was instant failure. Where is that flasher relay located exactly? Front, rear, under dash?

[37yrold911]

does 'known good' mean the battery was tested on a large, cart-based carbon-pile battery tester at an electrical shop?

[Frank Beck]

does 'known good' mean the battery was tested on a large, cart-based carbon-pile battery tester at an electrical shop?

True.

We get into trouble often when our guys use the Snap On "Sears Service Center" tester instead of Ole Faithful; our Sun VAT 40.

But in this case I'm betting ign sw related.

[dummkopf]

I would use a test light and few jumper wires and trace it down. As sithot said, check the grounds first and check out the positive side from there.