Electrical - Multiple Systems Malfunctions

Article No.
95-5-21

03/13/95

^ FUSE - FUSE "E" INOPERATIVE - VEHICLES UNDER 8500 LBS. GVW WITH 5.0L/5.8L ENGINES

^ LAMP - ABS LIGHT ILLUMINATED - VEHICLES UNDER 8500 LBS. GVW WITH 5.0L/5.8L ENGINES

^ LAMP - BACK-UP LAMPS INOPERATIVE - VEHICLES UNDER 8500 LBS. GVW WITH 5.0L/5.8L ENGINES

^ LAMP - DAYTIME RUNNING LAMPS INOPERATIVE - VEHICLES UNDER 8500 LBS. GVW WITH 5.0L/5.8L ENGINES

^ LAMP - MALFUNCTION INDICATOR LAMP (MIL) ON - DIAGNOSTIC CODES: 172, 173 OR 41 - VEHICLES UNDER 8500 LBS. GVW WITH 5.0L/5.8L ENGINES

^ RELAY - TRAILER BATTERY CHARGE RELAY INOPERATIVE - VEHICLES UNDER 8500 LBS. GVW WITH 5.0L/5.8L ENGINES

^ SPEEDOMETER - INOPERATIVE - VEHICLES UNDER 8500 LBS. GVW VEHICLES WITH 5.0L/5.8L ENGINES

LIGHT TRUCK:
1992-95 BRONCO, F-150-350 SERIES

ISSUE:
On some vehicles the HO2S wires in the 12A69O (subassembly of the 14BO6O battery cable) harness may become chafed and the vehicle could exhibit any one of the following conditions:

^ ABS light on

^ Speedometer inoperative

^ Back-up lamps inoperative

^ Daytime running lamps inoperative

^ Trailer battery charge relay inoperative

^ MIL on, displaying Codes: 172, 173 or 41 for HO2S failure

^ Inadvertent PCM Self-Test

ACTION:
Replace the damaged wire harness and HO2S sensor. Refer to the following procedure for service details.

SERVICE PROCEDURE



1. Disconnect negative battery cable.

2. Disconnect the solenoid terminal and positive battery cable from the starter.




3. Pull the cable downward to inspect the 12A69O harness for chafing, pinholes, etc. If necessary, remove the convolute and tape from the 12A69O harness located next to the lower RH side engine mount. Refer to Figure 1.

4. If the 12A690 harness is damaged, replace the 14BO6O assembly (F5TZ-14300-EA) and the HO2S sensor (F4UZ-9F472-A).

5. Inspect Fuse "E" and replace if necessary (D9ZZ-14526-D).

6. Clear all codes stored in memory.

7. Retest and verify the concern has been resolved.





Parts Block

OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage

OPERATION DESCRIPTION TIME

950521A Replace Harness Assembly, 0.7 Hr.
HO2S Sensor And Fuse "E"
(If Overloaded)

DEALER CODING
BASIC PART NO. CONDITION CODE
14B060 X1

OASIS CODES: 201200, 203000, 203100, 203200, 204000, 204200, 206000, 698298