Electrical - Starting Issue Options

[FUEL14]

Hi, I have searched the forum for answers to starting issues, but I can't seem to find a thread for a problem exactly like mine.

The 3-year restoration of my car is about to come to an end, with a plan to be on the road early February. The wiring has been checked by a professional and modified/repaired where necessary. Everything was working great, starting no problem at all. But, just a couple of days ago, she turned over in the morning and didn't in the afternoon. Nothing was done to the car in between aside from a rear coilover adjustment.

When I turn the key to the first position, I can hear the fuel pump whirring and all lights, horn etc work ok. But when I turn further to crank, all I get is a single click from the under-dash fuse box area.

I installed a new battery as part of the restoration. The voltmeter is reading 13.4.

Any ideas what might have gone wrong?

Thanks in advance, Luke.

[wonkipop]

what wattele says.

only other thought is - 30 years ago i had a similar problem - sort of.
turned out to be the seat belt interlock system, which took two hacks at getting rid of.
i had had it disconnected which got rid of the initial annoyance of the stupid thing (most 914s had that done straight away when new). ie doing up seat belt to start car.
then there was a remnant of it left including a relay under the passenger seat (rhs).
that relay would kill the ignition randomly for start upwhen it warmed up to a certain amount (but the car ran if it was running, just killed the starter, you could roll start it).
does not sound like your problem. we tracked that all down and cut it out of the ignition circuit.

i have seen pics of your car and it looks like you stripped it apart.
i doubt there is any trace of that crazy system still in it?

sounds like we will be going for a drive soon?

check the transmission ground strap.
up near the muffler hanger end.
you could have knocked that or its not grounding.