Flashed on my neighbors truck a few times. Does this mean "printed circuit board". Instrument cluster?

 

Only thing I found in a search was Trans Pressure Control B, whatever that means. https://www.ford-trucks.com/forums/7...phalanx-9.html Post #123 towards bottom its listed.

 

Any new developments on this? And BTW how did you get that pic of my wife in your sig?

 

Sorry Tim, I should have updated. It turns out that it was TBC or TCB, not PCB. Misunderstood him over the phone. Trailor brake control module going south it seems. Thanks for your effort though. Reps to ya.


Oh, and I got the pic when you was working late

 

Trailer Brake Controller----do a search cause there have been problems with this in the past. I think there's even a Ford TSB on it.

 

Nice! I may have met my equal- smartazzzz-wise!

 

Somehow I know what you are thinking Tim!

TSB 06-6-1 ISSUE:

Some 2003-2006 F-Super Duty vehicles used for towing may exhibit trailer lamps being inoperative or not working properly. This may be due to an open trailer tow fuse, a concern in the vehicle's wiring, a concern in the trailer's wiring, or the trailer not being wired properly for the vehicle.

ACTION:

If the vehicle exhibits an open trailer tow fuse, refer to the following Service Procedure to determine if the open trailer tow fuse concern is caused by the vehicle or the trailer wiring. If the vehicle does not exhibit an open trailer tow fuse, follow normal diagnostics.
SERVICE PROCEDURE




<TABLE border=0><TBODY><TR><TD width=80>NOTE:</TD><TD>FAULTS OR REPAIRS CAUSED BY TRAILER WIRING ARE NOT WARRANTABLE.</TD></TR></TBODY></TABLE>

<TABLE border=0><TBODY><TR><TD width=80>NOTE:</TD><TD>VEHICLE WIRING MAY DIFFER FROM MODEL-TO-MODEL OR YEAR-TO-YEAR. ENSURE THE TRAILER IS WIRED CORRECTLY FOR THE VEHICLE.</TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD width=80>NOTE:</TD><TD>ELECTRIC POWER TO EACH TRAILER CIRCUIT IS SUPPLIED THROUGH A RELAY AND DEDICATED FUSE AS SHOWN IN FIGURE 1.</TD></TR></TBODY></TABLE>

4-PIN CONNECTOR/2003-2004 VEHICLES

1. Check Fuses F2.6 and F2.38 in the central junction fuse box, located under the dash panel, left hand side.
   1. If the fuses are OK, do not continue with this TSB. Follow normal diagnostics to determine if the issue is in the vehicle or trailer wiring.
   2. If a fuse is found open, proceed to Step 2.
2. With the ignition key off, use a non-powered test light from battery positive terminal and test Pins 2, 3, and 4 for a short to ground (Figure 2). Pins 2, 3, or 4 must not have continuity to ground (no light). Pin 1 must have good continuity to ground (bright light - same as battery).

Figure 2 - Article 06-6-1

Note: Pin 1 is the :Male" pin and is the ground
Pin 2 is parking (it is the pin to the right of Pin 1)
Pin 3 is left turn
Pin 4 is right turn

1. If Pins 2, 3, and 4 pass the continuity test (no light), the concern is with the trailer wiring.
2. If Pins 2, 3, and 4 fail the continuity test (light), locate and repair the concern in the vehicle's wiring.

7-PIN CONNECTOR / 2003-2004 VEHICLES

1. Check Fuses F2.6, F2.38, F2.39, and F2.115 in the central junction fuse box, located under the dash panel, left hand side.
   1. If the fuses are OK, do not continue with this TSB. Follow normal diagnostics to determine if the issue is in the vehicle or trailer wiring.
   2. If a fuse is found open, proceed to Step 2.
2. With the ignition key off, use a non-powered test light from battery positive terminal and test Pins 1, 4, 5, 6, and 7 for a short to ground (Figure 3). Pins 1, 4, 5, 6, and 7 must not have continuity to ground (no light). Pin 2 must have good continuity to ground (bright light - same as battery).
3. 
   Figure 3 - Article 06-6-1
   
   Note (with trailer SLOT at the bottom):
   Pin 1 - LH Stop/Turn (this pin is in the 9:00 position. Numbering goes counter clockwise)
   Pin 2 - Ground
   Pin 3 -Electric Brakes
   Pin 4 - RH Stop/Turn
   Pin 5 - Battery (+)
   Pin 6 - Running lamps
   Pin 7 - Center pin (Backup lamps)

4. If Pins 1, 4, 5, 6, and 7 pass the continuity test (no light), the concern is with the trailer wiring.

5. If Pins 1, 4, 5, 6, and 7 fail the continuity test (light), locate and repair the concern in the vehicle's wiring.


4-PIN CONNECTOR / 2005-2006 VEHICLES

1. Check Fuse F1.9 in the battery junction fuse box, located in the engine compartment, right rear side and Fuse F2.38 in the central junction fuse box, located under the dash panel, left hand side.
   1. If the fuses are OK, do not continue with this TSB. Follow normal diagnostics to determine if the issue in the vehicle or trailer wiring.
   2. If a fuse is found open, proceed to Step 2.
2. With the ignition key off, use a non-powered test light from battery positive terminal and test Pins 1, 2, and 3 for a short to ground (Figure 4). Pins 1, 2, and 3 must not have good continuity to ground (no light). Pin 4 must have good continuity to ground (bright light - same as battery).

Figure 4 - Article 06-6-1

NOTE - the pins for this year model are opposite of the pins for the 2003/2004.
Note: Pin 4 is the "Male" pin and is the ground
Pin 3 is parking (it is the pin to the right of Pin 4)
Pin 2 is left turn
Pin 1 is right turn

1. If Pins 1, 2, and 3 pass the continuity test (no light), the concern is with the trailer wiring.
2. If Pins 1, 2, and 3 fail the continuity test (light), locate and repair the concern in the vehicle's wiring.

7-PIN CONNECTOR / 2005-2006 VEHICLES

1. Check Fuses F1.9 and F1.20 in the battery junction fuse box, located in the engine compartment, right rear side and Fuses F2.38 and F2.107 in central junction fuse box, under the dash panel, left hand side.
   1. If the fuses are OK, do not continue with this TSB. Follow normal diagnostics to determine if the issue is in the vehicle or trailer wiring.
   2. If a fuse is found open proceed to Step 2.
2. With the ignition key off, use a non-powered test light from battery positive terminal and test Pins 1, 4, 5, 6, and 7 for a short to ground (Figure 5). Pins 1, 4, 5, 6, and 7 must not have continuity to ground (bright light - same as battery).

Figure 5 - Article 06-6-1

Note - pins are the same as the 2003 - 2004 pins discussed above.

1. If Pins 1, 4, 5, 6, and 7 pass the continuity test (no light), the concern is with the trailer wiring.
2. If Pins 1, 4, 5, 6, and 7 fair the continuity test (light) locate and repair the concern in the vehicle's wiring.

 

I thought that the new trucks had factory indash trailer brake controllers that were having a TBC fault light in the dash. I'm not familiar with the operation of those trucks at all, but I know that when they first came out they had problems with them. Maybe this TSB covers those also. At any rate you're still the TSB guru Mark.