Electrical Systems - Failures Due To Poor Ground
NO.: 08-10-93GROUP: Electrical
DATE: Mar. 5, 1993
SUBJECT:
Electrical Failures Due to Loss of Ground Circuit
MODELS:
1993 (LH) Concorde/Intrepid/Vision
SYMPTOM/CONDITION:
On some vehicles, the left front and/or right front frame rail ground screws may become loose or broken causing intermittent or total loss of wiring harness ground.
GROUND SCREW FAILURE SYMPTOMS:
- Headlamp and park/turn lamps may be noticeably dimmer on one side.
- Headlamp may flash when turn signals are actuated.
- Fog lamps may be inoperative.
- Radiator fan may be inoperative.
- Speedometer, tachometer, and warning indicators in the instrument cluster may function erratically.
- Message center indicators may flash erratically.
- Transmission may default to limp-in.
- A/C blower motor may default to high blower mode.
- ABS warning light may come on.
- Horn may be inoperative.
This list is not complete as a floating ground can cause unpredictable or unrepeatable results. Any time a ground problem is suspected proceed to the repair procedure.
PARTS REQUIRED:
2 Zinc-Tin Plated Screws PN 00154552
REPAIR PROCEDURE:
This repair involves both the front frame rail electrical grounds.
1. Disconnect battery negative cable.
2. Remove both ground screws and all ground eyelets.
Right Frame Rail Ground
Left Frame Rail Ground
3. Drill a 5/32 inch diameter hole in the general area on the bottom of the rail for easy tool access. Also make sure that once the eyelets and screws are fastened to the rail that the ground wires will not contact sharp edges or mechanical devices.
4. Use two PN 00154552 screws to fasten all ground eyelets.
5. Fasten the screw to the rail with a torque of between 3.6 - 6.2 N-m (32 - 55 in.lbs.).
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation No. 08-90-65-97 0.3 Hrs.
FAILURE CODE:
83 - Connection loose