Peterbilt 387 electrical problem help

Sorry been running a lot. I know I have it in my email. Not sure if I have it on my phone. If you want pm me an email and I can forward the PDF to you.

 

Take them off, clean them and make sure they're tight. A bad ground can ruin your entire day. If you're having multiple problems, suspect a ground, if you have isolated problems, suspect the power circuit.

 

This will download. File. SK29863.PDF. If you want. Google it to see link before you download it. Hope it helps


Here is the PDF. 387 electrical diagram https://www.google.com/url?sa=t&...FjAA&usg=AFQjCNGrGmjbIvqke2VcQNZIqGceTPKACA

 

Do you still have that wiring diagram?

 

Since the link went to password protected. I've attached the sire diagram for 387_peterbilt.

 

I have a 2010 peterbuilt and the 5th wheel slide works perfectly but the alert won't stop has anyone had this problem

 

I know I'm a couple years late but do you still have the wiring diagram for a 2005 Pete 387?

 

The link is above for download.

 

THANK YOU! Sorry I didn't see it the first time I read through it. I did find it right after I sent that message to you. I've got a 2005 387 that has peterbilt (Idaho Falls) stumped. All of my gauges quit working except my speedometer. There is no power to the gauges but the truck runs and drives like there is no problem. Any ideas? I've replaced the cab load unit behind the dash with no luck of fixing the problem. I also replaced the black box in the frame rail behind the battery box with the same result. Any help would be appreciated

 

ive run into the same issue. guauges not working but Speedo. im going to take my 387 to Joplin Mo peterbilt. Andrew is the night manager and tells me he can help with that exact issue.

i had been looking online and the manual. seeing a "interface module" is having issues. and from. whst you say you replaced this module and no change. i would suggest leave idaho head to missouri. i am presently doing an inframe. so im not able to head to the shop yet. hope the manual helps. keep me posted on your progress.