Okay, never mind my other 2 replies! I've just back-tracked through the long list of your former posts. I see that you have had several problems for quite a while. I also see that you don't have any electrical experience or much general repair experience.
I suggest that the first things you need to do are to educate yourself on 'General Automotive Electrical' as in Theory and Repair Methods. Then do some research on specifics of Dodge Cummins truck electrical. After you've learned how it's supposed to work then you'll need to get the basic tools to test your system, like a Volt/Ohm Meter also called a Digital Multimeter, and Wire Strippers and Wire Terminal Crimper.
Trying to do repairs without first finding out how to do them will always cause problems. It looks like you may have caused quite a few problems now so it may take quite a while to straighten it out. Because of the changes you've made and the problems you've had you need to start with the basics of the system and test all the way through. That includes the Ground system, Battery, Battery cables, Alternator, Charging System, Regulator, general wire condition, then lighting.
Again, you need to learn what the proper repair methods are too, like how to use test tools, how to strip wire using proper gauge of stripper, how to use crimp connectors and how to properly re-insulate wire. Some links that may help:
Refers to Jeep and GM alternators but some good information:
http://oljeep.com/gw/alt/edge_Alternator_Theory.htmlMopar Chrysler/Dodge
http://www.moparaction.com/Tech/questio ... FYING.htmlGeneral Theory:
http://www.madelectrical.com/electrical-tech.shtmlGeneral info:
http://forums.corner-carvers.com/showthread.php?t=34419It's STRONGLY SUGGESTED that you pick up a Factory Service Manual and also a Haynes Service Manual for your year/model truck. Between the two you'll have detailed information on how to carry out repairs plus all wiring diagrams. Educate yourself on what you've got so you know how to repair it and get it in tip-top condition!
1967 Dodge D-100 Town Wagon - CPL 858 4BT, HTT Stage II/H1C 16cm/56cm turbo, '93 CTD I/C, 32K spring, minor fuel tweaks, milled head, NV4500, 1 ton springs, '72 D-200 Frt. axle w/ Air Lift bags, 4.10 Dana 60HD, F/R swaybars, Tom Woods shaft.
'90 W-350 gasser...