TasoZ24 Posted January 14, 2015 Author Report Share Posted January 14, 2015 Very grateful for your help and concern. Would ignition switch have something to do with my low voltages? Im getting volts at alternator, but not the cluster to turn on lamp. 1 Quote Link to comment
TasoZ24 Posted January 14, 2015 Author Report Share Posted January 14, 2015 Bottom diagram is awesome,many thanks 1 Quote Link to comment
TasoZ24 Posted January 14, 2015 Author Report Share Posted January 14, 2015 No light and my fuse box only has the bottom prong which is the yel/red wire. Stilll dont see how this happened, electronics went out then lights now alternator not doing anything. Im getting voltage at t plug but none once wire is in the cab. Lamp is coming staight from battery and sense goes to relay light and fusebox. Got volts at fusebox.seems like voltage is trying to get through, getting .01-.04 volts 1 Quote Link to comment
wayno Posted January 14, 2015 Report Share Posted January 14, 2015 Check fusible links, and I mean take them out of the truck and check them, unplug both ends so they are not getting power from anywhere. 1 Quote Link to comment
TasoZ24 Posted January 14, 2015 Author Report Share Posted January 14, 2015 Edit didnt go through. Im gettin 8.4 volts at lamp wire cluster connection. Battery volts at ign. Fusible links have been thrashed through near the battery. Im geting voltage at alternator with key on, not at cluster 1 Quote Link to comment
TasoZ24 Posted January 14, 2015 Author Report Share Posted January 14, 2015 About these fusible links, not really too informed about their importance of placement. Need to get new harness. Found one for 84 4x4, would this work? Cant really help myself with this mess I found 1 Quote Link to comment
TasoZ24 Posted January 14, 2015 Author Report Share Posted January 14, 2015 Calling all wire wizards, My 83 720 kc 2wd has not been charging for a month now. The wiring is finally right after many diagrams and brass splinters. However, now im getting only 8.4 volts in the lamp wire that goes from the alternator t plug with key on. Im getting battery at ignition and meter/flasher fuse. Looking for bad wires but harness is still intact (only place on truck it is) 1 Quote Link to comment
84720FourWheel Posted January 14, 2015 Report Share Posted January 14, 2015 An 84 harness should work. I think they are identical, but I'm not 100% Is yours a 4x4? 1 Quote Link to comment
TasoZ24 Posted January 14, 2015 Author Report Share Posted January 14, 2015 Nope just two wheel drive. About done with this stupid light. Got battery voltage up to weird film on back of cluster but no illumination. Trying all different bulbs that are left. Do any other bulbs have to be in place to complete circuit? Down to six bulbs 1 Quote Link to comment
flatcat19 Posted January 14, 2015 Report Share Posted January 14, 2015 What is charging voltage? Is the a concern about the dash light? 1 Quote Link to comment
MikeRL411 Posted January 14, 2015 Report Share Posted January 14, 2015 A most confusing "problem description" which requires rewording. The "8.4 volts" sounds like the regulated voltage to the Temperature and Fuel Level meters. 1 Quote Link to comment
TasoZ24 Posted January 14, 2015 Author Report Share Posted January 14, 2015 Sorry new to forums been researching them a long time never got to a point this bad to where I needed to make posts. Now getting correct voltage but no light, hence no charge. 1 Quote Link to comment
Charlie69 Posted January 14, 2015 Report Share Posted January 14, 2015 On the 84 harness swap. Does your truck have square gauges? The 84 truck should have round gauges. If you want to swap the harnesses you will need the gauge cluster also. and the 2 harnesses both need to be California emissions. Quote Link to comment
flatcat19 Posted January 14, 2015 Report Share Posted January 14, 2015 If the light is off everything is fine. What is charging voltage? 1 Quote Link to comment
wayno Posted January 14, 2015 Report Share Posted January 14, 2015 Geez, just remove the fusible links from the battery, unplug them from the harness and check them, it will take 5 minutes. The 720 harness is a weird animal, it has multiple places it gets power from thru the same wires, it kinda back feeds from other circuits, and low voltage can be one of the issues, you see when the engine is running, everything seems to work, but when it is shut off, nothing works right anymore. A good example of this would be the fact that the ignition light has something to do with the auto choke, why the ignition light would be connected to the auto choke is baffling to me, but it is. You can likely test the fusible links without totally removing them from the battery, but you have to unplug them from the wiring harness, they have to be removed from the wiring harness system. See the plug with the green and black wires connected to the battery in the photo below, if you look real close, you can see the black plug has melted a little, that plug and them fusible links can be a major pain sometimes, I have had to lift the hood and wiggle that plug in the past to get everything working. I forgot to post the photo. 1 Quote Link to comment
TasoZ24 Posted January 14, 2015 Author Report Share Posted January 14, 2015 Bam!!! Finally. Cleaned all prongs and fixed some crispy burnt wires all the way up to said plug. Thanks for the help fellas. Sorry about the mess. Will post pics once I figure out how 1 Quote Link to comment
bilzbobaggins Posted January 14, 2015 Report Share Posted January 14, 2015 update all your posts....:) congrats 1 Quote Link to comment
TasoZ24 Posted January 15, 2015 Author Report Share Posted January 15, 2015 The coil fuse was barley in tact. Changed that got voltage. Went through and got everything replaced and run new wire straight to battery. Works great. Dont know where wires go but I just nutted them off, everything runs and have proper voltage. Got this truck for dirt cheap because kid couldnt keep his amp for stereo going without problems. Truck Norris runs better than ever now. Thanks for all the concern guys, sorry to drag yall into this :-) 1 Quote Link to comment
TasoZ24 Posted January 15, 2015 Author Report Share Posted January 15, 2015 Got if figured out just finally had enough with the harness and wired it up with new wires and it works just fine. Got all my volts and can finally sleep at night. Thanks guys 1 Quote Link to comment
Draker Posted January 15, 2015 Report Share Posted January 15, 2015 Good work! 1 Quote Link to comment
MikeRL411 Posted January 15, 2015 Report Share Posted January 15, 2015 Got if figured out just finally had enough with the harness and wired it up with new wires and it works just fine. Got all my volts and can finally sleep at night. Thanks C Congratulations on making a difficult problem go away! Just make sure that you document the wire gauge and color coding of the new wires in case some "Gremlins" pop up later. 1 Quote Link to comment
datzenmike Posted January 15, 2015 Report Share Posted January 15, 2015 Calling all wire wizards, My 83 720 kc 2wd has not been charging for a month now. The wiring is finally right after many diagrams and brass splinters. However, now im getting only 8.4 volts in the lamp wire that goes from the alternator t plug with key on. Im getting battery at ignition and meter/flasher fuse. Looking for bad wires but harness is still intact (only place on truck it is) You have started a second post about the same thing. Rather than wasting time on duplicate answers, I merged them together. Until you fix this, everything related to your charging system should stay HERE. 1 Quote Link to comment
TasoZ24 Posted January 15, 2015 Author Report Share Posted January 15, 2015 Yeah I tried to delete but cant figure out site too well on phone. Sorry bout that. Problem solved, driving til next, hopefully less tedious, task. 1 Quote Link to comment
datzenmike Posted January 15, 2015 Report Share Posted January 15, 2015 Not a problem. It's mostly for other to read so they have no excuse later. 1 Quote Link to comment
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