The never ending 700r4 Lockup questions haha

[usar17]

c7 on which plug? There are 2 if I remember correctly that go into the ecm

 

[Jims86]

c7 on which plug? There are 2 if I remember correctly that go into the ecm

Each plug cavity is numbered on the side where the wires come in. Row designator will be at the end of each row. Small plug is A and B, large is C and D.

 

[usar17]

C7 is empty on my harness. Is there somewhere i could take my truck to have a pin added?

 

[MrMarty51]

C7 is empty on my harness. Is there somewhere i could take my truck to have a pin added?

You can do it.
Buy several of the right types of pins, also buy a W type of crimping tool, do a couple of practise runs on a piece of wire, then do the wire You will be using to make the run. shove it into the hole and it will be locked there.
Be sure that the wire going into the ECM, for that pin is in place.
IF that pin is absolutely necessary that is.

 

[Jims86]

ECM plug pins
http://www.ebay.com/itm/like/121160443036?lpid=82

 

[usar17]

Would any stores carry them?

 

[usar17]

Ok got pins. My transmission has 3 wires coming from it. Lt Blue, Green, and Yellow.

-Yellow goes to the EGR connector that is D/C.
-Lt Blue wire goes from the Tranny to both the EGR Connector and the Low Vacuum Sensor.
-Green wire.....i'm assuming goes to the brake sensor? (i'll confirm tomorrow)

what needs to be changed for the ECM controlled lockup?

 

[Jims86]

Ok got pins. My transmission has 3 wires coming from it. Lt Blue, Green, and Yellow.

-Yellow goes to the EGR connector that is D/C.
-Lt Blue wire goes from the Tranny to both the EGR Connector and the Low Vacuum Sensor.
-Green wire.....i'm assuming goes to the brake sensor? (i'll confirm tomorrow)

what needs to be changed for the ECM controlled lockup?

I dont remember the old wire colors, but that plug is labeled A B C D
The wire in A goes to the brake switch
B goes to pin C7
C not used
D goes to A7

 

[usar17]

ok. Got the PROMs switched out. Just waiting for the Pins to be delivered so i can run the new wire.

Is it ok to drive the truck awhile? I haven't changed any of the Transmission wires over to the ECM yet.

 

[Jims86]

ok. Got the PROMs switched out. Just waiting for the Pins to be delivered so i can run the new wire.

Is it ok to drive the truck awhile? I haven't changed any of the Transmission wires over to the ECM yet.

Yup...I dont think there is an error code for the high gear switch, so you shouldnt get a light.

 

[foamypirate]

Yup...I dont think there is an error code for the high gear switch, so you shouldnt get a light.

None that I know of, otherwise I would've thrown one by now with my TH350, I would imagine.

 

[Jims86]

None that I know of, otherwise I would've thrown one by now with my TH350, I would imagine.

Yarp.

 

[usar17]

ok so im tracing wiring from the original lock up harness. what a nightmare! so D went to the old EGR solenoid. A went straight into the firewall. B splits into 3 wires,to old EGR solenoid, to vacuum sensor, and to firewall. The 2nd wire for the vacuum sensor goes to the firewall also. So all three wires go into the cab, green from tranny A, Blue from B/EGR/Vacuum, and blue with black strip from vacuum. Sold blue goes inside the cab then goes to the brake switch the runs also the cruise control. Green and Bluew/Black go to what looks like a relay or controller on the base of the steering wheel. WTF haha

 

[Jims86]

keep the wire going to the brake switch, and wire the rest per my post referring to pins A BCD on the trans plug.
The one going to the brake switch is the positive power for lockup.

 

[usar17]

ok i just tested that solid blue is 12V with key and that cuts with the brake applied. that should go to A correct? it currently supplies power to the Vacuum Switch, EGR solenoid, and pin B on the tranny connector...