dimension12
Active Member
Can anyone tell me where all the chassis grounds are located? 99 EB with 5.4 4x4. With the stalling and multiple codes of different areas makes me think I have a ground issue. Crawling under truck and tracing wires today.
Chassis grounds
- Thread starter dimension12
- Start date
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ChrisOIFdoc
Full Access Members
You would be better off googling for that question, but chassis grounds should be pretty easy to find since they are mostly visible. With multiple codes it could be any ground, not necessarily a chassis ground. There are PCM grounds, grounds for the coils etc. DM member Bedrck47. He's pretty savvy with electrical.
dimension12
Active Member
Thank you. I have new battery cables coming. They are very corroded and I will be able to clean all the ground connections durring installation. Just recently the OD off light started flashing. When I put it in Neutral and shut it off then restart, while driving, the OD off light stops flashing and the abs light goes out for a few miles. Drove with fuel pressure gauge and is within spec. I get coil codes, cyl head too hot codes, fuel tank purge codes, long trim stays around 10 and 1 downstream O2 intermit. shows N/A.
dimension12
Active Member
Also coolant TS read -1* in a frozen data stream in one stall/ code generating moment.
ChrisOIFdoc
Full Access Members
OD flashing is tranny, speed sensor, solenoid. Somewhere along those lines. Are you noticing issues there. Have you checked the wiring and wiring harness to the tranny?
dimension12
Active Member
Yard work took me away from the truck today. Putting it up on jack stands in the AM to inspect that harness.
The trans fluid is still red and smells fresh.
The trans fluid is still red and smells fresh.
Last edited:
Will H
Active Member
Body(firewall) to engine (pass side)
Frame to radiator support (pass side)
Frame to body (pass side)
Those are the "big 3" as they call them.
The factory ones are junk.
Frame to radiator support (pass side)
Frame to body (pass side)
Those are the "big 3" as they call them.
The factory ones are junk.
ChrisOIFdoc
Full Access Members
Any luck?
dimension12
Active Member
Got the new cables on. Cleaned the under hood grounds. Runs much better. Injectors are going in as soon as it cools enough to be compfortable to work on it.
ChrisOIFdoc
Full Access Members
dimension12
Active Member
Forgot to say the OD light stopped flashing too. I now have the injectors installed and will know more when driving to work in the AM.
dimension12
Active Member
Truck runs pretty good for 321,000 miles. Slight stumble up hills until downshift occurs. May have some carbon build up on the valves too. Will run a couple tanks of premium through it and update again.
ChrisOIFdoc
Full Access Members
Run some seafoam through the oil for a 100 miles or so then change. Run it through your feul as well.
