Stupid '80 720 Coil Wire Question.....

[Buzzbomb]

Quick question about the coil wiring on a 1980 720 with the electronic distributor...I realize this is a stupid question, but like a putz I forgot to label the wires when I took them off my coil, however insignificant it may seem :rolleyes: ..My truck usually runs pretty good, and aside from the normal maintenance, I just don't pay all that much attention to details like that since I'm not constantly messing with it.

 

I have two wires to the coil, the setup is all stock...I have one FAT white wire w/condenser, the other a smaller black wire with the red stripe. I'm assuming the red/black is positive, and the fat white wire goes to negative? That's how I have it hooked up, so I just want to be sure. I'm troubleshooting a no start condition, so I'd like to eliminate the coil wiring out of the equation. I looked in the Haynes manual, and honestly, it just wasn't clear- nothing was labeled.

 

Thanks for any help :cool:

[banzai510(hainz)]

pull the wires off and

put the key to the ON position and that should be the wire that feeds the + side of the coil. usually its a BLK/WHT wire

 

or ck out the

http://www.olddatsuns.com/data/dat620-1979.pdf

[Buzzbomb]

pull the wires off and

put the key to the ON position and that should be the wire that feeds the + side of the coil. usually its a BLK/WHT wire

 

or ck out the

http://www.olddatsuns.com/data/dat620-1979.pdf

 

Thanks! I'm pretty sure I had them reversed. According to the diagrams on that site for a '79 with the EI, and after looking again at the one in my Haynes manual, the white wire goes to the + on the ICU, so it must go to the + on the coil. It looks like the BW wire you described is W in my truck. It's just one of those things you really don't pay attention to. If I have to, I'll just pull the white wire off, ground the voltmeter, and hook the + to the wire to see if it gets voltage with the key on, as you suggested.

 

That 620 site is a super good resource! Thanks for posting that link, lots of great stuff I can still use on that site :thumbup:

[datzenmike]

'80 720... White to + and Black/Red stripe to - of the coil terminals. The White also goes to double plug on a condenser the other side, also a Black/Red goes back to a separate single plug on the distributor.

 

FWIW these two Black/Red wires are not connected. I don't know what Nissan was thinking using two similar color codes so close together.

[Buzzbomb]

'80 720... White to + and Black/Red stripe to - of the coil terminals. The White also goes to double plug on a condenser the other side, also a Black/Red goes back to a separate single plug on the distributor.

 

FWIW these two Black/Red wires are not connected. I don't know what Nissan was thinking using two similar color codes so close together.

 

I hear you about the strange wiring... I was thinking about the wiring along the lines of red being hot and black being ground when I was trying to remember what went where. The black wire with the red stripe IS what threw me, and I thought I'd ask here just to be sure. I fixed it now, white with + and b/r with -. I even labeled it in my Haynes manual just in case :D

 

This is a neat board- I never knew it existed until I ran across it in a Google search. I've been a fan of these trucks for quite some time, and it's cool to see a board dedicated to the Datsun moniker. Thanks, I appreciate the help :w00t: