So, I have two dodge ram1500s, one is a 1996 single cab, 5.2 L engine with a 46RE tyranny. The other one is a 1999 5.2L with what I thought was the same tranny. So I just swapped the 1996 engine/tranny/torque converter into the 1999 truck. The problem is they have two totally different wiring harnesses. The 96 harness matches up with the engine, obviously, but does not match up to the fuse box. But if I move the Fuze box from the 96 over, the interior harness of the 99 does not match up. What are my options?

 

You should have kept this with your other post(engine swap). You need to swap all the sensors on the motor. Don't change the harness. As for the transmission you may be able to get the plug that fit's the older trans and splice it in. But you need to match the wires correctly. I believe the sensors changed in 2000 so they should be the same.

 

Ok, thank you so much. That's what I figured I was going to need to do with it but I just wasn't sure which would be the better route. I appreciate your time!

 

Ok, so I'm still on this rebuild, got the motor and tranny successfully transfered over from the 1996 to the 1999, got the wiring harness figured out. While connecting up the interior plugs, I came across a wire that was melted in the main cluster of wires going from a main plug and the floor side by pedal to up behind the dash. After tearing apart the entire dash, I found that wire led to behind the speedometer/instrument pannel and just dead ends into a plastic cover. Unfortunately, this wire has melted through several other wires. What would be the best way to going about fixing this problem?

 

When I run into wiring issues like that, I just cut out the bad section of wire (one wire at a time) and solder in a new section of wire, using heat shrink tubing to cover the soldered splices.

 

okay! Thank you so much!

 

As far as swapping sensors goes, since many are on the intake you may want to consider pulling it for a plenum job at same time. A bird and half for 2 stones.... lol

 

You may want to figure out what caused the melting wires in the first place. Replacing the wires is not curing the cause. Find the wire in the service manual and go from there.