Mitchka

I have no diagram or link readily available, but I know the amperage off them. Headlamps - 10 amps park/tail lights - 20 amps I am 95% positive that on your '73 they only used 10 and 20 amp fuses.

I believe you probably have a couple problems. The first thing that popped out at me is the fact that the Fuel Pump is hooked directly to the battery. I would first confirm that the wiring is connected at both ends without any breaks along the way. A continuity test would be best for this. The next thing I would suggest is running a ground back to the battery, to test the pump itself. It should run then. Check the fuel filter is clean, and make sure the fuel lines are not pinched anywhere. You should probably blow air (no more than 50 PSI) through them, make sure there are no blockages if you are really concerned. I would say that you most likely have just an electrical issue, and if you just recently bought the car, it might have quite a few gremlins in it. I've noticed that generally these cars have a lot of quick fixes to the electrical system, instead of a quality fix. Check the wiring harness, and you might be interested in purchasing new harnesses if you find a lot that shouldn't be there.

I am in the middle of restoring a 74.5 Datsun 260Z (found in a farmers field, next to a Willys and a 67 vette). I'll start off with what I have done, to give you guys an idea of what is going on... Engine was seized, so I pulled the engine out, squared up and honed the block, added all new inners (saved the originals) cleaned up the automatic transmission, changed all the fluids posible, tore the molded deteriorated interior out, and I have the interior 85% back together. The car is drivable now during the day, and the engine runs quite well, and now I'm down to figuring out the little problems that just are a pain in the butt. From my other 260Z and various purchases (thanks E-bay!) I have quite a few extra parts for testing and trial (and eventually sale). Now to the problem. When the car is running, I put a voltmeter on the positive side of the plugin that leads to the washer fluid pump and got 12.6v When checking the ground side, I kept getting 12.3v when the wipers were turned off. When the wipers are on any of the 3 settings (only high works) the negative grounds out, and works like a ground should. When the wiper switch is turned off, should it give a 12.3v signal on the ground? I am not an electrical engineer, nor have I taken any advanced classes, but I do know the basics, and I have never heard of a ground pulling voltage like this. I think I have a wire crossed to the ground somewhere, electrifying it, but I wouldn't know where. I have 3 wiper/light stalks, and all have the same issue, so I am 95% sure the problem is not with the stalks themselves. On a side note, all the stalks only work on high, and the washer button does nothing. Could anyone check the connection to their washer fluid pump, and see if you can pull a 12.3v off the ground? Maybe that is the way it is supposed to work? It goes against my reasoning, but who knows?