99 exp The OD Off light is flashing

[strap21061]

The OD Off light is flashing and has no power when taking off in D. If I shift into 2nd gear the truck takes off then I shift to D and it's ok. Any ideas of what maybe wrong?
Thanks

[way2old]

You need to have the codes read. The flashing light indicates thare is an electrical problem somewhere in the system. Some scan tools may not be able to read the transmission codes. So you may have to search around. I would try Autozone/Pep boys/ Advance to see if they can read the codes first. If they have a code, post the exact code number here so we can help further.

[strap21061]

Here are the transmission codes: 743, 750, 755, 1747, 1754, & 1760.
I also have 141 & 161 O2 sensors.
I spoke to someone who says all those codes mean I have either a blown fuse or the harness for the transmission has a broken or shorted out wire. Does this sound familiar to anyone?
Thanks.

[way2old]

There is a TSB for that. It is number 99-19-7.

• LAMP—INTERMITTENT MALFUNCTION INDICATOR Article No.
LAMP (MIL) ILLUMINATION—DIAGNOSTIC 99-19-7
TROUBLE CODES (DTCS) P0741, P0750, P0755,
AND P1746 MAY BE STORED IN MEMORY—
VEHICLES BUILT FROM 8/1/1998 THROUGH
5/1/1999 WITH 4R70W TRANSMISSION
• LAMP—INTERMITTENT TRANSMISSION CONTROL
INDICATOR LAMP (TCIL) ILLUMINATION—
DIAGNOSTIC TROUBLE CODES (DTCS) P0741,
P0750, P0755, AND P1746 MAY BE STORED IN
MEMORY—VEHICLES BUILT FROM 8/1/1998
THROUGH 5/1/1999 WITH 4R70W TRANSMISSION
• TRANSMISSION—4R70W—INTERMITTENT
TRANSMISSION CONTROL INDICATOR LAMP
(TCIL) ILLUMINATION—DIAGNOSTIC TROUBLE
CODES (DTCS) P0741, P0750, P0755, AND P1746
MAY BE STORED IN MEMORY—VEHICLES BUILT
FROM 8/1/1998 THROUGH 5/1/1999
FORD: 1999 CROWN VICTORIA, MUSTANG, ECONOLINE, EXPEDITION, EXPLORER,
F-150, F-250 LD
LINCOLN: 1999 TOWN CAR
MERCURY: 1999 GRAND MARQUIS, MOUNTAINEER
This TSB article is being republished in its entirety
to include additional vehicles and to correct the SERVICE PROCEDURE
Service Procedure. 1. Perform normal diagnosis for DTCs retrieved as
ISSUE outlined in the appropriate 1999 Workshop Manual. If root cause is not determined,
Intermittent Transmission Control Indicator Lamp continue with this TSB.
(TCIL) or Malfunction Indicator Lamp (MIL)
illumination may occur on some vehicles. The 2. Remove the transmission oil pan per the
following Diagnostic Trouble Codes (DTCs) may be appropriate model Workshop Manual, Section
stored in memory: P0741, P0750, P0755, and 307-01.
P1746. This may be caused by the solenoid
interconnect molded lead frame not being fully 3. Verify that the solenoid interconnect molded
seated or the bulkhead interconnect clips not being lead frame is fully seated on all the solenoid
fully seated between the solenoid interconnect connectors (Figure 1). If the solenoid
molded lead frame and bulkhead interconnect. interconnect molded lead frame is fully seated,
then gently remove the solenoid interconnect
ACTION molded lead frame, valve body, and bulkhead
Verify the solenoid interconnect molded lead frame interconnect (-7G276-) per the appropriate
(-7G276-) is fully seated. If no concern is found, model Workshop Manual, Section 307-01.
then inspect the bulkhead interconnect terminals for
spread and/or not fully recessed. Refer to the
following Service Procedure for details.
PROOF 6-MAR-00 88-5175 88-5175 PAGE 1
Article No. 99-19-7 Cont’d.
4. With the bulkhead interconnect removed, push OTHER APPLICABLE ARTICLES: NONE
down on the terminal cover and check to see if SUPERSEDES: 99-18-6
any of the terminals are slightly protruding WARRANTY STATUS: Eligible Under The
above the plastic cover (Figure 2). Gently pry Provisions Of Bumper To
off the terminal cover using a small screwdriver Bumper Warranty Coverage
(Figure 3). With the terminal cover off, inspect And Emissions Warranty
the bulkhead interconnect for spreading Coverage
terminals (Figure 4). If the bulkhead OPERATION DESCRIPTION TIME
interconnect terminals are spread or slightly 991907A Perform Inspection And 1.3 Hrs.
protruding above the plastic cover, replace with Replace Bulkhead
a new Bulkhead Interconnect (F8AZ-7G276-AA). Interconnect
DEALER CODING
5. Reassemble. CONDITION
BASIC PART NO. CODE
PART NUMBER PART NAME 7G276 42
F8AZ-7G276-AA Bulkhead Interconnect OASIS CODES: 206000, 501000, 502000, 504000
F8AZ-7G276-BA Solenoid Interconnect
PAGE 2 88-5175 88-5175 PROOF 6-MAR-00
Figure 1 - Article 99-19-7
PROOF 6-MAR-00 88-5175 88-5175 PAGE 3
Figure 2 - Article 99-19-7
Figure 3 - Article 99-19-7
PAGE 4 88-5175 88-5175 PROOF 6-MAR-00
Figure 4 - Article 99-19-7
PROOF 6-MAR-00 88-5175 88-5175 PAGE 5

[way2old]

The codes for the O2 sensors could be related. I would check external wiring on the drivers side going to the sensors also.

[strap21061]

Thanks for all the replies. I have an update maybe this will help.
I found (fuse 24 15A* Powertrain Control Module, Automatic
Transmission, CMS Sensor) in the power distribution box blown. Anyone have an idea what this goes to?

[way2old]

You probably found the problem. But there was something that caused the fuse to blow. That is where the work is going to come in. It controls the Trans. Fluid Temp, Torque Converter Clutch, Electronic Pressure Control and the Shift solenoids in the transmission.

[strap21061]

I removed the blown fuse and ohmed out each connector and no short was detected. I then installed a new fuse and so far the tranny is fine. Maybe I need to do a fluid and filter change on the tranny?
I hope this is good now.
Thanks for all your help.

[strap21061]

Anyone knows what type of transmission fluid to use in the 1999 expedition eb 5.4l engine w/4x4?

[way2old]

Mercon V