1996 Dodge Truck Gen Light

Chrysler Corp. Light trucks use a Denso generator. The generator consists of a rotor, stator, rectifiers, front and rear covers and drive pulley. Voltage regulation is controlled by the Powertrain Control Module (PCM) on all models except diesel. I am assuming your truck is not a diesel. The PCM monitors critical input to control fuel injection, ignition, emission and other engine management functions. The PCM is also programmed to monitor charging system related circuits: Battery feed to PCM. Generator field control. Battery charging voltage (high & low). If a problem is sensed in a monitored circuit, a Diagnostic Trouble Code (DTC) will be stored in PCM memory and Malfunction Indicator Light (MIL) will come on, provided specific criteria have been met. DTCs can be read using MIL, Chrysler's Diagnostic Readout Box (DRB-III), or a generic scan tool. If you don't have a scan tool, go to your local parts store and have them download codes if there is any.
INITIAL CHECKS Before proceeding with charging system diagnosis, ensure following conditions are met: Battery is fully charged and in good condition. Battery cables are in good condition with connections clean and secure. Generator belt is in good condition and properly tightened. Generator and PCM wiring harness connections are clean and tight. Engine ground strap is in place.
UNSTEADY OR LOW CHARGING Check for loose generator belt, charging resistance too high, loose generator ground wire, corroded battery terminals or faulty generator.
SELF-DIAGNOSTIC SYSTEM If a problem is sensed in a monitored circuit, a Diagnostic Trouble Code (DTC) will be stored in PCM and MIL will come on, provided specific criteria are met. PCM will then enter limp-in mode, substituting information from other sources to compensate for component failure. Vehicle is operational in limp-in mode, but driveability may not be optimal. A specific DTC results from a particular system failure. DTC only indicates problem circuit. It does not identify specific component failure in the circuit. If problem is repaired or ceases to exist, PCM automatically clears DTC after 50 ignition on-off cycles. DTCs can also be cleared using scan tool.
I will most likely need the codes before I can assist you, I want to check the wiring looms in the engine compartment and around the transmission make sure the wires are in good condition. And that the transmission guys did not damage the loom or pinch any wires between the engine and the transmission

OK, while you are waiting for your scanner checked the list I sent you, and try to do some of the diagnostic procedures, as so as you download the code I will be able to assist you better.

Is this the fuse box under the hood you were talking about?

if that is correct tell me which fuse in its

I am having a hard time finding that fused in my schematics, can you please tell me what circuit that fuse operates?

Sorry I found it, disconnect all of your plugs on the wiring loom to the A/C Compressor Clutch, Horn Relay, Horn Note & A/C Compressor Clutch, one of those systems is shorting out, unplug those, then remove your battery cable, it does not matter which one, put a test light in between the of cable and the battery, if the light comes on you still have a short, if the light does not come on plug-in each component until the light comes on and that is your problem lies.

I notice from your photo that the vehicle has an alarm, that may be giving you some trouble also disconnected for now and perform the following test while you are waiting for parts:
The way to check for a draw is to remove one of your battery cables, it doesn't matter which one take a test light and put one end on the battery cable and the other end of the battery with everything turned off and the doors closed. If the light stays on (the test light), then you have a circuit that is drawing power. While under the hood remove each fuse one by one to see if the test light goes out replace fuse and move onto the next one when you are done with the fuses do the same thing with the circuit breakers, removed them one by one and see if the test light goes out. After you are done with the fuse box under the hood Open up your door, make sure the interior light does not come on if it does take your finger and push the button in on the door and hold it or remove the light bulb, after you have done that, begin to remove your fuses, from the dash one by one and putting them back checking the test light as you remove the fuse and if the test light goes out, that's where your problem is, in that circuit. Let me know what you find. Call me if you need to

You can buy a test light at any automotive parts store, they are not very expensive. Once you have obtained a test light listen to me very closely, remove the positive (+) cable from the battery, you may need an additional person to help you, the test light will have an alligator clip on one end, you can clip that on the battery cable, and the other end touch the top of the battery post, making that connection from the battery cable through the test light to the battery post, if the light comes on you are having a draw, when you've got to this point, with a test light connected to the battery, began to remove the fuses one by one putting them back When you are done testing that specific circuit one by one if the test light goes out you have found the circuit that is drawing the current. Do the same thing with the relay's and follow my previous instructions on checking the inside fuse box of the cab.

I don't think your understanding how to do the test, because you said "I could not do one inside the cab because the light wouldn't reach" the test light doesn't have to go anywhere except on the battery, remove the positive (+) cable from the battery, you may need an additional person to help you, the test light will have an alligator clip on one end, you can clip that end on the battery cable, and the other end touch the top of the battery post, making that connection from the battery cable through the test light to the battery post, if the light comes on you are having a draw, do only what I told you just now and let me know if the light comes on.

That is correct. Now with that test light in that position, remove your fuses one by one and replacing them, when the test light goes out you have found the circuit that is draining your battery. Let me know what you find out