Power from Taillight is wired to fuel sending unit... Check!

Simple. Post a photo, a GOOD photo of the pickup wiring coming out of the column

One group is for the ignition, the other group is for the turn signal

The turn signals, other than wiring color changes, and the changes in the hazard switch, work the same between the pickup and your older car

That is, all locking columns use an "in column" hazard switch which is actually mechanically and electrically part of the turn signal switch. So you won't need your original hazard toggle on the dash if it had one

Here's what goes into ALL Mopar TS switches, in your case the later style

IN.........switched power from brake light switch

IN.........output from TS flasher

IN.........output from hazard flasher

OUT.......left front TS which also branches off to feed cluster indicator

OUT......right front as above

OUT.....Left rear turn lamp (also brake)

OUT....Right rear turn lamp (also brake)

So it's simply a matter of confirming what you have "on the car end" and what you have "on the column end" and interfacing them

The ignition switch would be same deal, depending on which one you want to use. There may be color changes, but, essentially, there are the same wires, plus might be a couple--three more......like "key in buzzer" switch, illuminated key power, shift quadrant lamp, etc.

This is why I suggested you paw around the truck forums and try and find a diagram for that pickup. If not, refer to the one I posted earlier. If that one does not "jive" go to MyMopar and use the same year wiring for a Mopar pass. car, as the colors are likely the same.

Then we can do something.

Something that is INTIRELY useful is an old stop / tail lamp, here's why..............

This gives you a "heavy" lamp with TWO filaments that you can "rig" several ways. You can do testing with this lamp without burning stuff up, because it will limit current flow.

You can "rig" it these ways, to provide more and more current:

Least. use the two "hot wires" so that power goes in series through both filaments, do not connect the ground shell of the lamp

Next.....Use the lamp shell and the tail lamp lead

One more step up.....Use the lamp shell and the stop lamp lead

Heaviest....Use the lamp shell, and twist the two lamp wires together so you have both filaments in parallel.

This thing is VERY useful for chasing stuff like this, and shorts. You can wire this from the battery NEG to ground, and throw a "dead short" across the hot lead to ground, and all it will do is light your test lamp!!!!