Electrical Issues
1...Drain. Start with a 12V test lamp. Disconnect battery ground, and put the lamp between battery post and ground. Does it light? Check everything imaginable. Is lighter pulled out, glove box lamp out, trunk light?
Then move to your multimeter, put that in series on the high amps scale and move down to milliamps. Measure the drain
2....Brake lights. Access the connector at the column which feeds the turn signals. You need a wiring diagram. I believe the brake lights switched power FROM the brake switch and TO the turn signal switch is white. See if you have power there when pedal is pressed. If so and if the lights do not come on, you have a turn signal switch problem
3...Define "running lights." Front lamps (parking) ONLY light in "park" position of headlight switch. But if you have no park or tail, there are TWO power feeds to the HL switch. One is UNfused, comes from the ammeter circuit, and powers ONLY the headlights. The tail/ park/ instrument power comes from a fuse, check that
4...Timing. Where is it set and what is the advance curve, AKA have you checked that at least the mechanical advance is working, and not stuck or rusted?