Pcm pinout for my 89 f250 5.8, 4x4

Reply Subscribe

Thread Tools

Search this Thread

Nov 4, 2019 | 03:10 PM

Meun207

Thread Starter

New User

Joined: Nov 2019

Posts: 5

Likes: 0

Pcm pinout for my 89 f250 5.8, 4x4

I bought the truck as a semi project. The wiring harness on the engine and cab are different. I'm looking for the pinout for my cab pcm so I can figure out what goes where. Thanks in advance.

Nov 4, 2019 | 05:02 PM

subford

Fleet Owner

Joined: Aug 2005

Posts: 23,667

Likes: 301

From: Easton,Ks

Is this what you want?

Name: 20NRk4g.png
Views: 2732
Size: 808.6 KB

OR this one:
Name: Gond7WP.png
Views: 4302
Size: 1.77 MB

Nov 7, 2019 | 12:07 PM

Meun207

Thread Starter

New User

Joined: Nov 2019

Posts: 5

Likes: 0

thanks! its exactly what im looking for

Nov 16, 2019 | 06:08 PM

Meun207

Thread Starter

New User

Joined: Nov 2019

Posts: 5

Likes: 0

ok, so, I thought I had the wiring corrected. the oil and temp gauges are working. the check engine and engine lamp are working correctly. I still have a surge, I replaced thr iac motor, still surging. checked vacuum hoses. still surging. removed the spout connector, smoothed out, idles and runs better than it ever has. it would seem I still have a ignition wiring issue. I pulled the pcm and opened it up. saw no evidence of bad caps, no visible diode or resister , no burnt tracks. I was a tauto tech many years ago and I feel I should know whats going on, I don't. any ideas would be appreciated. thanks