Datz350

Great info!! I'm going to do the volt meter test tomorrow. The needle on the AMP gauge doesn't move towards the negative. When I step on the brakes the needle moves towards the positive. Same thing when I turn on the brakes. I noticed that when I apply the brakes my fuel pump skips for a bit then sounds like it slows down. Once I step on the gas the fuel pump sounds like normal. What's going on here?

The AMP needle is always pointing towards the negative side, a little bit though. Every time the brakes are applied or the lights turn on the needle moves towards the center. It's never on the positive side.

My fault, it is a AMP gauge. So, what would cause my AMP gauge to go down when I press on the break? Turning on the headlights does this as well.

The beast is up and running again!!! Found out that the wire coming from the ignition to the fuel pump relay was disconnected. Who ever wired it up did it with a, (female/male?), connection which had been separated. Hooked them back up and BAM, fuel pump is running again. A concern persists though. Why does the fuel pump sound like it skips? And ever time I'm on the brakes the voltage meter on the dash drops, then rises when I release the brake. Sounds like the fuel pump loses power then gets it back. I'm bewildered, any help?

What about wiring the fuel pump to a switch? And the fan to a switch. Would that be a bad idea?

Just to recap, my problem is that the electric fuel pump isn't turning on. The reason I'm bringing up the fan is because I noticed that one of the power wires on the electric fan had been melted to the plastic wire cover. After separating it the fuel pump cut on, I was surprised. That's why I'm asking if the wiring for the fan has something to do with the fuel pump.

Well just figured out what the fan is hooked up to is a fan relay, such a newb... That same fan relay has a wire going into the cabin which is then hooked up to a fuse, looks to be air con. 20A, and another wire going to a blue w/yellow stripe, (ignition??), and then back out to a yellow w/black stripe wire, (not sure what that is). After the blue w/yellow, (ignition?), the wire has bits of it sticking out of the insulation. I'm thinking thats bad, right?

Yes, I did just get the car. It's a 71 240z w/ chevy 305 matted to a th350. The fan has a wire hooked up to a 30a fuse which is wired to some sort of distribution block with different wire provisions. I noticed this same block has a red wire in it coming, from what I think is the ignition, which is why the fan turns on with the key. Why does my fan have three wires and why does the third wire, without the fuse getting so hot? What is the third wire for?

Forgot to mention that the fan is wired up to stay on all the time. And, should both ignition and power wires be routed to the same spot?

It doesn't right now. It would before, thats what I was saying first. At first it would kick on with the key on. It isn't doing it now. Which is why I'm asking if the fan wire getting hot is affecting my fuel pump. Sorry about the confusion.

Ok, there are three wires coming from the fan. Ground, power... And ignition??? Ground is mounted on the frame, I know that for sure. I can't tell the difference between the other two. One is wired to a fuse going to...a fuse block?? Not sure what it is, but it also has the third wire connected to it, the third is connected directly to the...fuse block?? Again, I don't know what it is, soory, newbie. I know that through this, "block", the fan gets its power because it has a wire going to my ignition. As soon as I turn the key to accesories the fan kicks on. When I turn the key to "on", the fuel pump kicks on... Now my problem..... The wire on the fan that is hooked, in the same spot as the one that has the fuse, gets really hot. I'm thinking that because of that, the fuel pump doesn't cut on. Why does my electric fan affect my fuel pump. Help please. Btw, car is a 71 240z.

Hmmm, not sure why the picture isn't showing up, I'm on my phone. I will be checking that jtr site. Thanks for the info.

Picked up a 71 240z w/chevy 305 carbd & th350. Sparks up all the time, idles fine, runs fine. Now for the questions. Does anyone have a wiring diagram for a v8 datsun? Does anyone know what the second throttle cable is? It looks like some kind of sensor under the throttle cable. You can see it on the picture. AND, how can I get the speedo and tach working? Thanks for any help.