Fuel Pump gets no power

[FastWoman]

Zewald, that's great! I'm happy you're running again!

Knarf, the fuel pump relay and the fuel pump CONTROL relay (two different relays, both controlling the fuel pump) are located inside of that black steel box on the inside of the passenger side fender -- the same steel box that the two fusible link assemblies are mounted to. You can get inside the black box by removing the black plastic cover on the backside.

The starter doesn't have a separate solenoid. It's just part of the starter.

If you haven't found it yet, you can download a free factory service manual for the '78 Z. Better still, if you look for it, you can find a used paper one on Ebay or Amazon for $80. It's a lot easier to use than a file on a computer. Something like this, except for a 280Z, not a B210:

http://cgi.ebay.com/1978-Datsun-B210-Factory-Service-Manual-/350440614543?pt=US_Nonfiction_Book&hash=item5197e36a8f

[knarfrabot]

Thanks for the fast reply, fastwoman! Is there a way to test these relays to see if they're functioning properly? I'm considering the possibility that this could be a wire issue as well.

[Zed Head]

The 1978 FSM is well-copied, in to chapters, and easy to get through, if you want to dig a little deeper on your own - http://www.xenons30.com/reference.html

[knarfrabot]

Thank you zed, I'm downloading it now. I hope I can get it starting without going to a mechanic.

[knarfrabot]

For anyone who might know, I don't know if its of any significance but the "fasten seat belts" light and the buzzing sound when I turn the key isn't going off anymore, is that any indication to the problem with the fuel pump or related in anyway?

[Zed Head]

That would be an odd coincidence. I would check to see if anything else doesn't work, radio, headlights, brake lights, etc. Or just go direct to your fusible links. You might have one blown.

The Body Electrical chapter should have the wiring for the buzzer and warning light. Each chapter usually has a nice small wiring diagram for the topic, easier to use than trying to follow the big "whole car" diagram.

[FastWoman]

Knarf, work backwards from the fuel pump. Does it get power but not run? If it doesn't get power, do you at least have power at the connector at the firewall? If not there, do you have power at the fuel pump relay? If not, is the relay tripping? Do you have power to the relay? Etc., etc. There's no "usual" failure point. You just have to trace the circuit down until you find the problem.