Yet another EDIC Post

[GregFrench]

My EDIC stopped working. I know some about this, and have read through the search, but would like some other input as well. I know it was working yesterday. Last night is was not.
I just changed the clutch slave yesterday...could that have something to do with it?
Is there a fuse to this, or is it just a relay? (I'm guessing the same fuse as the starter)

Here is what I plan on doing today (from easiest to most difficult). Please let me know if you can think of anything I am overlooking, or any steps in between I am missing:

- Check the power at the relay
- Check the power at the EDIC motor
- Take out the EDIC motor and inspect/ clean the contacts.

Thanks

 

[sandcruiser]

What is the failure mode? Is it doing the EDIC funky chicken (overfuel, normal, cut, overkill, normal, cut...)
Or is it stuck in a given position?

If stuck in "off", then maybe you just knocked the oil pressure sender wire, which will stick the EDIC in off.

 

[amaurer]

If stuck in "off", then maybe you just knocked the oil pressure sender wire, which will stick the EDIC in off.

Really? My oil pressure sender affects nothing but the gauge in the dash. The second sender, the low oil cutoff, needs to be connected to ground to stick the EDIC, and even that takes a few seconds to kick in.... ??

 

[GregFrench]

What is the failure mode? Is it doing the EDIC funky chicken (overfuel, normal, cut, overkill, normal, cut...)
Or is it stuck in a given position?

If stuck in "off", then maybe you just knocked the oil pressure sender wire, which will stick the EDIC in off.

No funky chicken. Fortunately it is stuck in run. Seems to not be getting any power.

 

[sandcruiser]

my oil sender has 2 tabs- 1 low px cut, 1 oil pressure. I was referring to the low px cutout.

If the EDIC is just stuck in "on", I would spend some time checking grounds first,
You might also try just jumping the EDIC motor directly to see if the problem is the relay or the motor.

 

[GregFrench]

Ok...pulled the plug on the EDIC and tested it. Red wire gets power all the time. Yellow wire gets power when key is turned to start. Green wire gets power after key is turned back to "on" after start and stays on for 5-10 seconds. Blue wire does nothing. Is the blue wire the ground? I see no other wires coming off the EDIC that might be the ground. Anybody have a wiring diagram with colors, or happen to know where the ground is?

 

[sandcruiser]

test for continuity on that blue wire with a known ground. Should answer your question.

I *think* that there is another wire that leaves the motor housing but doesn't go to the loom, it grounds through the motor housing? I don't have mine nearby to look at, but I do recall something like that.

Here is a photo of the inside of the EDIC motor. According to my notes, the black wire grounds to the housing. I have some more photos/notes posted on edic motor repair

Something else I recall about the tear-down: there are matchmarks machined into the wheels on the inside of the motor. But you may find it a good idea to add some marks of your own as you take it all apart, because the orientation of the two wheels does matter when you put it back together, along with the position of the arm. To tear down the edic motor, you do NOT have to remove the arm at all, just pull the screws out of the lid on the motor and the lid comes off with the arm attached. But use some caution not to loose washers and such from inside, there are several that can slip away if you don't pay attention.

 

[GregFrench]

I notice yours has no blue wire. Mine has no black wire. Are these the same? Does your black one go to the harness?
Just noticed...my blue wire goes into the harness, and a thicker white wire comes out and goes to the edic.

I take it the EDIC needs to be removed before you can take off the cover, right?

 

[GregFrench]

test for continuity on that blue wire with a known ground. Should answer your question.

Just so I am sure...that means by using a test light, right? I hooked one end to the - on the battery and the pointed probe into the connection. No light.
That's how I tested all of the wires in the harness. It didn't answer my question.

 

[sandcruiser]

actually, hook the test light to the + battery terminal, then poke the blue wire to see if it lights up. If light, then blue goes to ground.

Also: at which point in the harness are you talking? There *is* a blue wire leaving the EDIC relay. I don't recall if there is a blue wire on the motor or not, but the black wire does go to ground.

I'll take another look at my edic motor later when I'm by the truck.

And yes, you do have to remove the motor to open it up, but it comes off very easily with a few 10mm bolts. On the 2H, there is a spacer on one of the EDIC motor bolts, don't drop that when you pull the bolt out. Especially don't drop it on a dark gravel driveway at night. Trust me on this one.

 

[GregFrench]

actually, hook the test light to the + battery terminal, then poke the blue wire to see if it lights up. If light, then blue goes to ground.

Also: at which point in the harness are you talking? There *is* a blue wire leaving the EDIC relay. I don't recall if there is a blue wire on the motor or not, but the black wire does go to ground.

I'll take another look at my edic motor later when I'm by the truck.

And yes, you do have to remove the motor to open it up, but it comes off very easily with a few 10mm bolts. On the 2H, there is a spacer on one of the EDIC motor bolts, don't drop that when you pull the bolt out. Especially don't drop it on a dark gravel driveway at night. Trust me on this one.

I was looking at your picture of the EDIC. I checked the harness where it plugs into the EDIC and have those 4 wires. Your picture has black instead of blue (which is white on mine)
Confused yet?

 

[sandcruiser]

well.... black on mine is ground. I know that much!
I'm too tired (long day at work, short visit to bar) to go outside to look right now, but tomorrow I'm installing what **should** be a repaired edic relay on the cruiser, and should have plenty of time to look at the wiring.

I'll jot down some notes

 

[GregFrench]

The relay labeled as "fuel control" relay, correct?

Took my edic off today and pulled the cover. Everything inside looks like the pictures, and all wires are connected. It is back on the truck now.
I tested continuity with (+) to the blue wire and it lit up, so I guess that is the ground.

Everything seems to be connected as it should be, but it is still not working. Any ideas?

 

[Eric Winkworth]

if you pull the arm off the edic your truck will run, but you have to open the hood to shut it off.... when I was having issues I was thinking of rigging up some kind of cable to pull from in the cab for shut down...

check your engine fuse that was my problem, truck still cranked and ran perfect other than no signals... it was due to trailer light wiring under the carpet...

 

[GregFrench]

if you pull the arm off the edic your truck will run, but you have to open the hood to shut it off.... when I was having issues I was thinking of rigging up some kind of cable to pull from in the cab for shut down...

check your engine fuse that was my problem, truck still cranked and ran perfect other than no signals... it was due to trailer light wiring under the carpet...

If it was a fuse, it wouldn't be getting power, though. My EDIC harness is getting power.

 

[sandcruiser]

Certainly for short-term mobility (like, several months for some lazy bastard like me) you can pull the arm off and just stall the truck out in 4th or 5th to stop it.

I finally got my edic back from an electrician guy. He "fixed" it, but said that the "memory" on the board is less than 100%.... so the edic doesn't work just right. I don't know if he is right or wrong, but it does work most of the time, which is good enough for me for now.

If I were keeping this truck for my own use, I would probably just rig up a cable. Less convenient, but foolproof. Or get a solenoid and wire it in as a fuel-cut solenoid so that when you either loose oil pressure or turn the key off, the fuel stops, truck stops.

 

[GregFrench]

Certainly for short-term mobility (like, several months for some lazy bastard like me) you can pull the arm off and just stall the truck out in 4th or 5th to stop it.

I finally got my edic back from an electrician guy. He "fixed" it, but said that the "memory" on the board is less than 100%.... so the edic doesn't work just right. I don't know if he is right or wrong, but it does work most of the time, which is good enough for me for now.

If I were keeping this truck for my own use, I would probably just rig up a cable. Less convenient, but foolproof. Or get a solenoid and wire it in as a fuel-cut solenoid so that when you either loose oil pressure or turn the key off, the fuel stops, truck stops.

I have been stalling it, but don't want to keep doing that. What I would like is to know why it quit in the first place.

 

[GregFrench]

Gave up the searching and installed a kill switch. Hopefully this will be one of those strange little things that will somehow fix itself when I stop paying attention to it! I have lots of those issues.

 

[Wayneraintree]

Hey Greg,

Not sure if you read my post on the topic... I read Sandcruiser's detailed write up, PM'ed Tarpage who is in the know on EDIC's and 2H's, and read all the search as you did.

My EDIC was cycling via the Fuel Control Relay in wierd ways... totally unpredictable... rainy: it would cycle, lights on/headlights on: it would cycle, blower fan on high: it would cycle...

I took apart the motor, cleaned the contacts, ran a separate ground from the motor to the fire wall, cleaned all my battery terminal, grounds from block to frame, to body, etc. checked continuity from all the wires on the relay with success.

Something I did fixed it (at least for the last month anyway) we'll see...

let us know if you discover the root of the problem