720 Fuel pump wiring ?

1980-1986 Datsun 720 forums. All 720-specific topics and discussion can be found here.
lego126
Posts: 54
Joined: Wed Nov 03, 2010 7:13 pm
Car: 97' HB 4x4 280K
85' 720 180K

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My fuel pump is working about 90% of the time. I replaced the Pump 367 days ago, and before anyone says the relay, The relay is bypassed, and the pump is on a toggle switch. It will stop and not start up for an hour or so, then it fires right up and runs for a few weeks. I'm guessing the pump is going out again, and I already have a replacement, but I would like to hook up the original wiring and take it off the toggle switch. I know the relay is useless right now because I can take it out and it has no effect on the way the truck runs. I went to hook up the original wires yesterday, and there is a Purple/white wire back there that is completely rotted. There are only 2 wires 1 is pu/W, and 1 is Br, that power the fuel pump. I'm wondering if anyone knows where the other end of these wires go? I suppose I can cut the rubber and trace them all the way back, just worried about cutting something else. I've got a chiltons, but.. I can't seems to find the pu/W, and Br 2 prong connector that powers the fuel pump. I was hoping someone had a FSM and could help me out, 85 Nissan 720 z2.4 2-wheel drive. thanks for any help offered.


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PEZi
Posts: 20441
Joined: Thu Dec 11, 2008 8:21 am
Car: Mitsubishi Lancer Evolution IX Mitsubishi Racing Edition
Location: Pikes Peak, CO
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Aw, man. Wish I had my book on me to tell you exactly what they are. About 2 years ago I had the entire harness to the back end of the truck out and re-wired it, but without my manual, I couldn't tell you what the specific colors run to. A few guys on here have theirs, however, so let's see if we can't get this solved for ya! I'll get back to you with my personal info as soon as I get the chance to pick up my old notes!


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