btd19m Posted August 22, 2015 Report Share Posted August 22, 2015 it just started randomly cutting in and out. for about 40km of the 120km trip today it read 13.6v and charged battery 1 to full and the VSR swapped and it part charged battery 2. the rest of the trip it just read the battery reading (from 8.94v batt 1 to 13.8v[vsr cut out]) (batt 2 cut in and charged from 11.2v to 12.4v then the alt stopped working again) Quote Link to comment
datzenmike Posted August 22, 2015 Report Share Posted August 22, 2015 http://community.ratsun.net/topic/67224-anyone-running-one-of-the-280z720620520-125-amp-alternators-in-there-datsuns/?do=findComment&comment=1287374 Maybe you should make use of this post about your alternator. Keeps all the charging posts together. Did you try the suggestion there? ck to make sure battery is good and the cables.Most of my electrical were always bad cables and or corrossion Water on the belt will do this. Another thing is replacing the brushes. 1 Quote Link to comment
btd19m Posted August 22, 2015 Author Report Share Posted August 22, 2015 http://community.ratsun.net/topic/67224-anyone-running-one-of-the-280z720620520-125-amp-alternators-in-there-datsuns/?do=findComment&comment=1287374 Maybe you should make use of this post about your alternator. Keeps all the charging posts together. Did you try the suggestion there? Water on the belt will do this. Another thing is replacing the brushes. ill get it looked at again Quote Link to comment
btd19m Posted August 22, 2015 Author Report Share Posted August 22, 2015 the plug bottom middle. whats it for? mine doesnt have that plug. and its not in my wiring diagram. Quote Link to comment
btd19m Posted August 28, 2015 Author Report Share Posted August 28, 2015 My alt is still cutting in and out. No cause yet. Sparky had no idea why it happens. Its now been rebuilt Quote Link to comment
btd19m Posted August 28, 2015 Author Report Share Posted August 28, 2015 Still happens though Quote Link to comment
datzenmike Posted August 28, 2015 Report Share Posted August 28, 2015 My alt is still cutting in and out. No cause yet. Sparky had no idea why it happens. Its now been rebuilt Still happens though Which is the expensive way to prove that it was fine to begin with. Some things that might seem like the alternator charge is going on and off.... A bad plug on back of alternator. A loose charge wire on the alternator. (probably tight now) A flown fusible link. (one of two) Vehicle motion can cause it to make and break connection. A bad or poor fuse connection in the fuse box. Bad ignition on/off switch. A loose wire on the volt meters. A loose wire on the dual battery set up Quote Link to comment
btd19m Posted August 28, 2015 Author Report Share Posted August 28, 2015 My alt plug is just two wires Quote Link to comment
btd19m Posted August 28, 2015 Author Report Share Posted August 28, 2015 No plug. Just two wires. Guessing it was the po who caused it. Quote Link to comment
datzenmike Posted August 28, 2015 Report Share Posted August 28, 2015 Did the PO install dual batteries, volt meters? Better check everything. 1 Quote Link to comment
btd19m Posted August 28, 2015 Author Report Share Posted August 28, 2015 http://i.imgur.com/yNWXtkE.jpg http://i.imgur.com/0q5vDNc.jpg Rang po he said that the old plug snapped off at somepoint and after a few flat batterys he had a shop quick fix it. Quote Link to comment
datzenmike Posted August 28, 2015 Report Share Posted August 28, 2015 Do I need to point out the obvious? Instead of a post about what it does why not take a look at it and then fix it? Quote Link to comment
btd19m Posted August 28, 2015 Author Report Share Posted August 28, 2015 its connects to the alt. im aware of that. but what is the black/white wire meant to connect to? the other side? my diagrams dont even show that plug Quote Link to comment
btd19m Posted August 28, 2015 Author Report Share Posted August 28, 2015 wobbled the single wire. alt cut in and out. got it to a good spot and taped it for now. seems like a bad connection. Quote Link to comment
datzenmike Posted August 28, 2015 Report Share Posted August 28, 2015 You don't see the duct tape, the miss matched plug and wires, home made connector crimped on? This is home made. Hokey! I have doubts that the correct alternator is even on there. On a normal 720 here the White/Black stripe wire connects to a fusible link and the battery positive on one end and to the ignition switch on the other. How can we know what was done here? Follow through with this post... http://community.ratsun.net/topic/67245-workshop-manual-source-for-the-1981-datsun-720-dual-l18/?do=findComment&comment=1288224 Dual cab and 5 speed have nothing to do with the charging system. Get something with a L18 wiring diagram. 1 Quote Link to comment
datzenmike Posted August 28, 2015 Report Share Posted August 28, 2015 wobbled the single wire. alt cut in and out. got it to a good spot and taped it for now. seems like a bad connection. Christ taping it up IS your problem. Make a solid connection and solder it if you have to. Good clean firm connectors and plugs. How do you survive 180 miles out of town doing this?????? 1 Quote Link to comment
btd19m Posted September 13, 2015 Author Report Share Posted September 13, 2015 when replacing the alt and adding a second. (removing ac compressor as its stalling the motor again when used) what type is suggested. looking at something like this http://www.ebay.com.au/itm/Holden-Chev-Universal-1-Wire-Internal-Reg-100-amp-Chrome-Alternator-S3902-/400818283594?hash=item5d52a1a44a or the ford kind early 80's f trucks came with. as they in part hooked right to the battery. bypassing the stock wiring Quote Link to comment
btd19m Posted September 13, 2015 Author Report Share Posted September 13, 2015 http://www.ebay.com.au/itm/Nissan-Pulsar-N14-N15-N16-200SX-S14-S15-100-Amp-Hi-output-Alternator-FREE-Meter-/131512297045?hash=item1e9ebe6655 or that Quote Link to comment
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