No, the clutch won't engage at all because the shift solenoid doesn't send pressure to it. That doesn't mean there is anything wrong with the clutch, it means there is an electrical issue with the solenoid, or more likely, the wiring to the solenoid.

 

Ah okay that's what I thought. I was confused for a second. I wasn't trying to tell the OP that there was something wrong with his clutch packs.

 

Just following along and hoping I never have to go threw this.

 

 

What now Fellas,

Well I've proved continuity on all pins from the Solenoid Pack Connector (9 Connections) to the PCM.
All wires prove good with no broken wires.

So I re-connected the tranny and the PCM and connected the batteries.
Put AE on her and pulled codes.
The only Enhanced Powertrain Code was P0603 Internal Control Module Keep Alive Memory (KAM) Error :- Module : Computer and Auxiliary Outputs.
I expected this due to batteries being disconnected for about 24 hours.

Cleared codes and started the truck. Sure enough 30 secs in and the OD Light is flashing.
Reversed just out of my shed and put it in Drive and drove back into the shed. Could put foot to floor with little or no response.
Reversed again foot to floor moving but no rev response. Did same thing reverse out back in in 1st, then repeat in 2nd and drive again. All the while little or no rev response to pedal.

Shut her down and checked for codes. P0603 is the only one that came up with no P1747
Cleared code and started her again and ran through the same routine as before with same results.

Shut her down pulled codes and again only P0603 and again no P1747 OD light still flashes.

What to do what to dooo??

As an interest to you blokes. You might notice that on the RHD versions of these trucks that the PCM comes through the fire wall about where your brake pedal is.

 

Does the engine respond properly to pedal input when the transmission is in Park or Neutral?

 

G'day Leonard,
Sorry I should have mentioned that it appears to respond and rev up as normal when in Park or Neutral.

Reg.

 

Was the truck reversing normally before the OD light started blinking? Did you inspect the female contacts in the harness to see if any of them have been pushed out of place/corroded/spread apart?

 

I haven't tried reversing or moving before the OD light starts blinking. I'll try that tomorrow (it's late night over here now).
I did look as best I could at those contact pins and they looked good to me. There is a pic of them above in this post.

I did a couple of other things like remove the PHP chip and start her. But like now as mentioned I only get Code P0603 and OD Light blinking, with no sign of P1747

Reg.

 

This is a head scratcher alright. I will noodle on this through the day and see if I think of anything else.

EDIT: If you have a spare speed sensor or three, try replacing the ISS, OSS and VSS and see if that makes a difference. There would normally be codes for these so I doubt they are the issue but it's better than throwing really expensive parts at the problem.

 

Is it an illusion or is that yellow on red wire cut there?

 

If that red and yellow (391) wire is cut, or damaged,

that goes to pin #12, power from the pcm to the electronic pressure control solenoid.

 

Wire 391 is spliced inside the wiring harness about 12 to 18 inches (25.4 to 38 cm) from the end of the solenoid connector. The solenoid pack would be difficult to check with it in the transmission. If you had an extra connector and multimeter it would be easier. Amazon has them for about $30 USD.

 

G'day Walleye,

No I don't think that is a cut wire but a bit of black silicon stuck to the wire beside it and the angle gives that illusion it is cut.
Besides it had good continuity when I tested all the wires from the connector to the PCM.
Thank you very much for the Connector Drawing and the Solenoid Pack Test Procedure.

I should be able to OHMS test the Pack by disconnecting the PCM and use the Multimeter from that end following colour code of the wires back to the Solenoid Pack Pins #?
What I'm suggesting is:
Seeing as I've previously disconnected both the Harness Connector and PCM Connector to Multimeter a Continuity test for broken wires, I should be able to do the same, but do it for OHMS?

Cheers & Beers,
Reg

 

Agreed. What time zone are you in? I have a F81Z-7G391-CB. PWM solenoid pack left over from my transmission rebuild. It ohms out fine and free to you if you want it. The only thing is that it seemed to not hold third gear very long at all before it commanded torque converter lock-up.