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69 911 electrical help appreciated


der Geist

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I have been working on restoring a '69 911T for a quite a while now and thought I was coming into the home stretch...

This week:

Replaced both batteries, distributor cap and rotor, bosch german blue coil, points, plugs and wires. Checked all the gaps twice, reseated the cap and triple checked all the wires. Everything is OK.

No spark.

Checked it all again and checked all the fuses in the fuse box. All OK. Went out today and bought a meter. Called permatune tech dept for help about the Capacitive Discharge unit. Downloaded the technical data from permatune and did a bench check on it with the ohm meter and everthing matches with the factory data sheet so I assume that it is working OK. The coil tests at 3 ohms on avery old analog meter (with a weak battery) and 3.5 on a new digital ohm meter.

Tonight was checking all the grounds that I could find. Permatune brown is grounded fine. Batteries are grounded fine. As well as about 6 other grounds I found, all fine.

Anyone got any suggestestions??? If I didn't shave my head I would have lost all my hair over this. Was so mad I almost put it up for sale on eBay. Almost.

Also-does anyone know where I can get a diagram of the ignition switch? It doesn't seem to be in the Haynes manual. Much of the time I could be working on this I am alone and it would be nice if I could crank the car from the engine compartment. I found an old pistol grip remote switch in my toolbox but I need to know which connections to jump in the ignition switch.

ANY help would be SOOO appreciated! I really don't want to spend 300-400 on a new permatune if it is at all possible.

Martin

'03 Boxster

'69 911T in progress -

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  • 1 year later...
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I have been working on restoring a '69 911T for a quite a while now and thought I was coming into the home stretch...

This week:

Replaced both batteries, distributor cap and rotor, bosch german blue coil, points, plugs and wires. Checked all the gaps twice, reseated the cap and triple checked all the wires. Everything is OK.

No spark.

Checked it all again and checked all the fuses in the fuse box. All OK. Went out today and bought a meter. Called permatune tech dept for help about the Capacitive Discharge unit. Downloaded the technical data from permatune and did a bench check on it with the ohm meter and everthing matches with the factory data sheet so I assume that it is working OK. The coil tests at 3 ohms on avery old analog meter (with a weak battery) and 3.5 on a new digital ohm meter.

Tonight was checking all the grounds that I could find. Permatune brown is grounded fine. Batteries are grounded fine. As well as about 6 other grounds I found, all fine.

Anyone got any suggestestions??? If I didn't shave my head I would have lost all my hair over this. Was so mad I almost put it up for sale on eBay. Almost.

Also-does anyone know where I can get a diagram of the ignition switch? It doesn't seem to be in the Haynes manual. Much of the time I could be working on this I am alone and it would be nice if I could crank the car from the engine compartment. I found an old pistol grip remote switch in my toolbox but I need to know which connections to jump in the ignition switch.

ANY help would be SOOO appreciated! I really don't want to spend 300-400 on a new permatune if it is at all possible.

Martin

'03 Boxster

'69 911T in progress -

I have just completed a '69 911E restoration, and even though I'm an electrical engineer, I had to really work to get the electrical system correct. You realize that the points do not use a "Condenser" (actually a capacitor)..right? If your distributor has a capacitor on the outside, then it may be your problem. With the capacitor out of the circuit, ensure the points are actually connecting the wire from the capacitive discharge unit to ground. If the car has sat for a while, it's entirely possible that the surface of the points are dirty and not actually making a connection. To test this, disconnect the wire from the side of the distributor and touch it to ground, while placing the distributor end of the coil wire within 1/8th of an inch to a ground, like the engine block. Ignition switch "on", each time you touch the distributor wire to ground, you should have a VERY hot spark at the coil wire. DO NOT handle the business end of the coil wire as you may get a veeery nasty surprise. I finally found the correct wiring diagram at www.nineapart.com-pdfs-911-1-65-69 Good luck and I hope I've helped!

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