Coolman1987us
Full Access Member
So last August I had a weird electrical issue that I thought was a fluke. Turns out it's back. Last August as I was sitting at the drive thru window my dash started doing the lost comms dance. Service abs, taction control, 4wd, etc, service the world. The truck sat in my garage for a week while the ecm I ordered was mailed to me. Turns out that wasn't the issue. When the new emc arrived I tried the original for ***** and giggles and it worked. No further issues. New ecm sat in the shelf, still there now.
Fast forward to today, much worse. I have the service the world messages on the dic, hard shifts, no power, brought it in the garage now it doesn't start and no comms with any module.
Fuse box under the hood had water under it, where the connectors are. Pulled the fuse board apart and cleaned some minor surface corrosion. Fuse box cradle also swapped from another truck and same issues.
Ohms test between can high and can low on obd port show 0 ohms (dead short).
Pulled the splice pack connector under the dash and removed the comb to isolate modules from can network. No communication with anything at any point using a tech 2.
Now the fun part. Standing at the workbench going through schematics... wtf is burning? Look around, smoke rolling from exterior passenger wheel well. Yank the battery negative and dive underneath to follow the smoke. Previous owner had z55 autoride deleted and resistors at all 4 corners were installed where the shocks should be. Well the resistor for the passenger rear was cooked. Melted electrical tape and all. Cut the resistor out and no more smoke.
This is as far as I got. Next step is pull out the suspension computer over the spare tire and maybe that module is gone. If anyone has any useful information please let me know. I think I got the major points but I may add more to the story later.
Fast forward to today, much worse. I have the service the world messages on the dic, hard shifts, no power, brought it in the garage now it doesn't start and no comms with any module.
Fuse box under the hood had water under it, where the connectors are. Pulled the fuse board apart and cleaned some minor surface corrosion. Fuse box cradle also swapped from another truck and same issues.
Ohms test between can high and can low on obd port show 0 ohms (dead short).
Pulled the splice pack connector under the dash and removed the comb to isolate modules from can network. No communication with anything at any point using a tech 2.
Now the fun part. Standing at the workbench going through schematics... wtf is burning? Look around, smoke rolling from exterior passenger wheel well. Yank the battery negative and dive underneath to follow the smoke. Previous owner had z55 autoride deleted and resistors at all 4 corners were installed where the shocks should be. Well the resistor for the passenger rear was cooked. Melted electrical tape and all. Cut the resistor out and no more smoke.
This is as far as I got. Next step is pull out the suspension computer over the spare tire and maybe that module is gone. If anyone has any useful information please let me know. I think I got the major points but I may add more to the story later.
