Jnull

Bump for anyone that can help answer this.

What year was the donor? A lot can change depending on year and options.

Nah I’d find a diesel one. I just hope someone can answer my question!

I bet man. I wasn’t planning on using the half ton harness. No way would it work in a diesel truck. I’d source once from a 99 diesel.

00 and up definitely wouldn’t be compatible with 99 and down, im not even sure 01 and 02 are compatible on everything. You’re definitely right in saying a lot of goofy stuff went on. the biggest difference is the headlight switch and overhead console, I’m not sure if the overhead console wiring ties into the dash wiring harness or not. Since I’m swapping an entire half ton dash in I have to swap dash wiring harnesses anyhow, so I’m hoping to swap a 99 harness in instead since the one in my 98.5 is hacked up some. I know you can rewire the headlight switch to take the 99+ style but it seems like they should be compatible, that’s a complete guess tho lol. Your truck sounds awesome man, 02 6spd long bed...very desirable.

Bump for anyone that can help with 98.5 and 99 dash wiring harness compatibility.

Hahaha touche

I’ll have to look the pcm mod up thanks. I’ve had the WT ground mod page on here saved for a while, definitely something I’ll be doing. Thanks for chiming in Mike. I didn’t do any of the work to this truck, the way it sits is the way I received it ppump and all unfortunately. I wanted nothing to do with it but a good friend literally begged me to take it off his hands for a price I couldn’t pass up. I like VP44 powered trucks, my 99 with the quadzilla was a great truck when it was on the road but since I didn’t do the ppump conversion on this truck I don’t have any of the removed parts and won’t be tracking them down to swap it back. I’m not going for all out power just a small set of compounds and probably afc live for tunability. Youre saying I need to send the entire engine wiring harness into be repaired? Also do you have any input on my original question about 98.5 and 99 dash wiring harness compatibility? Thanks.

I don’t need any help in regards to the ppump conversion, and I’m sure most of the issues I’m having are ecm related. I can figure those things out. What I’m after is finding out if a 99 dash harness is a plug and play swap into a 98.5 while obviously using the 99 headlight switch. Whats the pcm mod in your signature if you don’t mind sharing?

Hi guys new here, mopar man I miss seeing you on CF! Im hoping to get a question answered that isn’t getting much traction on CF. I have a 98.5 24v a friend begged me to take off his hands as it’s pretty modified and a lot of poor work done to it. It’s ppumped, has an external voltage regulator wired up and every light on the truck inside and out quickly pulses, WTS light doesn’t come on, gauge cluster works intermittently, fass is wired to an always hot toggle switch, etc... Im swapping out the entire dash for one pulled out of a 99 1500 and I’m hoping to use the 99+ headlight/fog light switch and move the airbag selector up to the 99+ spot. Would a 99 diesel dash wiring harness be a plug and play direct swap into my 98.5? I believe the only change is the headlight switch, from looking at the 98.5 and 99 Airbag selectors they appear to have the same plugs on the back and the only difference appears to be the shape of the housing since they mount in different locations. Any help would be appreciated.