Main harness replacement

SJFrank

Member
Anyone replaced their main harness. I’ve got a 94 Row Def 90 I’ve been working on. I imported from Italy and a lot of shotty electrical work. They hard shorted something and several wires burnt at firewall. I’ve been having problems with wires failing at firewall and ordered a new main harness. Anyone replace one or know of a good shop in Denver area to work?
Thanks
Steve Frank
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MountainD

Technical Excellence Contributor
Maybe JC‘s British orRoadside Werx. Those have experience. However, it is more time consuming then hard and you may find the cost of that harness to be cheap compared to the labor... but both could do it. it may also discover a lot of other things to have to do, although your truck looks nicely sorted. Personally I’d repair existing or do it myself. But if $5k-8k (guess) is no biggie…. I would love to hear what they quote!
 

MountainD

Technical Excellence Contributor
And if you do fit it yourself, do yourself a favor right off the bat—remove the entire dash set up. And take pictures of every electrical connection, attachment point and routing. Very important to be able to see wire colors and attachment pin locations. more picture than you’d ever except— you can delete them all later if you choose. Not every wire code will ine up, nor connectors at times. Too many variations but it’ll get you 95% there. Auto sparks is who I used too. But I just repaired my main on the 110. Since I did the 90 from scratch, that main took a while to figure out due to lack of pics :-(. Chasing wiring gremlins is a pita. Just replaced the rear on my 90 and I still have several head scratchers on the auto sparks wiring (but everything works).
 
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