# Service bulletin 19891

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10023300
- Published by NHTSA: 2007\-11\-08
- Manufacturer's number: 19891
- Manufacturer's date: 2007\-07\-01
- NHTSA component: ELECTRICAL SYSTEM:WIRING

## NHTSA's summary

SOME 2008 F\-SUPER DUTY \- WIRING FAULT ON TRAILER DISPLAYED IN MESSAGE CENTER WITH DTC C2806. \*NJ

## The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

## Components

Electrical system, Wiring and fuses

## Trouble codes named

C2806

## Vehicles listed

- 2008 FORD F\-250 SD
- 2008 FORD F\-350 SD
- 2008 FORD F\-450 SD
- 2008 FORD F\-550 SD
- 2008 FORD F\-650 SD
- 2008 FORD F\-750 SD

## Other bulletins for the same vehicles and component

- [20131](/bulletins/10024694.md), 2008-05-08, Service bulletin: ELECTRICAL SYSTEM:WIRING:FUSES AND CIRCUIT BREAKERS. 2008 F\-SUPER DUTY 6.4L DIESEL \- VREF CODES P1335, P0193, P0642, P0643, OR P0652. \*NJ
- [072311](/bulletins/10023865.md), 2008-02-09, Service bulletin: ELECTRICAL SYSTEM:WIRING. ENGINE BRAKE SWITCH BACKLIGHT INOPERABLE\-\-CATERPILLAR ENGINE ONLY. \*NJ
- [07166](/bulletins/10023252.md), 2007-11-06, Service bulletin: ELECTRICAL SYSTEM:WIRING:FUSES AND CIRCUIT BREAKERS. THE 2008 F\-SUPER DUTY VEHICLE IS EQUIPPED W/ A SMART JUNCTION BOX \(SJB\) OR GENERIC ELECTRONIC MODULE \(GEM\) AND ITS FUNCTION IS TO PROVIDE PROTECTION AGAINST EXCESSIVE CURRENT LOADS, TYPICAL OF A SHORT CIRCUIT, BY SHUTTING DOWN CIRCUIT OPERATION. THE SJB/GEM STRATEGY MAY INTERPRET THE SWITCHING BETWEEN FORD HEADLAMPS AND EMERGENCY VEHICLE LIGHTING, AND VICE\-VERSA AS A SHORT\-TO\-GROUND, CAUSING THE POWER FEEDING A HEADLAMP CIRCUIT THROUGH THE SJB TO BE TURNED OFF. \*NJ
- [19918](/bulletins/10023251.md), 2007-11-06, Service bulletin: ELECTRICAL SYSTEM:WIRING. \(WIRING FAULT ON TRAILER\) DISPLAYED IN MESSAGE CENTER WITH DTC C2806 \- MY 2008 F\-SUPER DUTY. \*NJ
- [19852](/bulletins/10022772.md), 2007-09-26, Service bulletin: ELECTRICAL SYSTEM:WIRING. WIRING FAULT ON TRAILER DISPLAYED IN MESSAGE CENTER WITH DTC C2806. \*NJ
- [19730](/bulletins/10022244.md), 2007-07-23, Service bulletin: ELECTRICAL SYSTEM:WIRING. WIRING FAULT ON TRAILER DISPLAYED IN MESSAGE CENTER WITH DTC C2806. \*KB
- [19704](/bulletins/10022238.md), 2007-07-23, Service bulletin: ELECTRICAL SYSTEM:WIRING. WIRING FAULT ON TRAILER, DISPLAYED IN MESSAGE CENTER WITH DTC C2806. \*KB

JSON: [/v1/bulletins/10023300](/v1/bulletins/10023300)

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