I have pulled the dash and have gone through most all of the wire continuity checks I could get to. Can this be a relay in the small electrical box under the hood?

Symptoms:
Blinking Overdrive Light
Max Engine Spreed is 1500 rpm (limp home mode)

What I have Checked:
All Wire Connections under the Dash
Wire Continuity for Overdrive Switch
All Fuses for Continuity
Ground Wire Continuity to the Block.

When did this happen:
When I moved a ****ty alarm install away from the bundle of wires under the dash. The Alarm was acting up and I wanted clear access to it so that I could attach a BitWriter to it.

Error Codes Present via Innova 3000 Series OBD2 with ABS:
B1676
P0743
P0750
P0755
P1747
P1754


Errors & Possible Causes:
B1676 - Battery Pack Voltage Out Of Range
Blown Anti-lock Brake System (ABS) Fuse
ABS module harness is open or shorted
ABS module connector poor electrical connection.
Faulty charging system
Faulty ABS module
https://www.autocodes.com/b1676_ford.html
P0743 - Torque Converter Clutch Circuit
Faulty torque converter clutch solenoid valve
Torque converter clutch solenoid valve harness is open or shorted
Torque converter clutch solenoid valve circuit poor electrical connection
Low transmission fluid level
Dirty transmission fluid
https://www.autocodes.com/P0743_ford.html
P0750 - Shift Solenoid 1 Circuit Malfunction
Low transmission fluid level
Dirty transmission fluid
Faulty shift solenoid 1 valve
Shift solenoid 1 valve harness or connectors
Shift solenoid 1 valve circuit is open or shorted
https://www.autocodes.com/P0750_ford.html
P0755 - Shift Solenoid 2 Circuit Malfunction
Low transmission fluid level
Dirty transmission fluid
Faulty shift solenoid 2 valve
Shift solenoid 2 valve harness or connectors
Shift solenoid 2 valve circuit is open or shorted
https://www.autocodes.com/P0755_ford.html
P1747 - EPC (Electronic Pressure Control) Solenoid 'A' Short Circuit
Faulty Line Pressure Solenoid
Line Pressure Solenoid harness is open or shorted
Line Pressure Solenoid circuit poor electrical connection
https://www.autocodes.com/P1747_ford.html
P1754 - Coast Clutch Solenoid Circuit Malfunction
Faulty Coast Clutch Solenoid
Coast Clutch Solenoid harness is open or shorted
Coast Clutch Solenoid circuit poor electrical connection
https://www.autocodes.com/P1754_ford.html

Instrument Panel Codes from Odometer:
5284 - Oil Pressure Switch Failure
9201 - Unknown
9318 - Battery voltage low
9352 - Unknown
A658 - Unknown
D027 - SCP Invalid or Missing Data for Engine RPM
D262 - Missing SCP message. ("missing SCP message" converts directly to OBD-II code U1262 which is "SCP (J1850) communication bus fault".)
D950 - Unknown

 

You have an electrical code for every solenoid in the transmission. That can't be in the OD switch wiring. It's almost certainly a problem with the wiring to the solenoid body. That connection is on the passenger's side of the transmission.

 

What about the connection forward of the firewall. Can it be there?

Are there any relays under the hood that can be the cause of the problem?

Thank you for sharing your wisdom.

Tom

 

It can be anywhere from the PCM (Powertrain Control Module) to the transmission. You have so many things electrical that show a fault that I wouldn't be surprised if you find the harness has been cut in two. I don't think any relays could cause this.