A/C Compressor - Does Not Engage
No: 80/02/97/NASRef:
Issue: 1
Date: 07/18/97
Improved Air Conditioner Reliability
AFFECTED VEHICLE RANGE:
DEFENDER (LD) ALL 1997 with Air Conditioning
SITUATION:
LOSS OF AIR CONDITIONER COOLING
The Air Conditioning system compressor does not engage when cooling is required. The cause may be that Fuse 16 has blown, resulting in an open circuit. A poor ground circuit from the AC compressor may also contribute to the problem.
RESOLUTION:
INSTALLATION OF 20 AMP FUSE IN POSITION 16 AND MODIFIED GROUND
A service kit is being made available which upgrades the fuse 16 position from a 15 Amp fuse to a 20 Amp fuse. Corrected labeling and Owners Manual information is also provided in the kit. In addition to the upgraded fuse, the ground wire for the compressor clutch is to be relocated to an improved location as described in the procedure below to ensure a good path to ground.
PARTS INFORMATION:
LRN90FUSEKIT Service Kit for upgrade of fuse # 16
^ 20 Amp replacement fuse Qty 1
^ Label for FUSE box Qty 1
^ Owners manual page Qty 1
WARRANTY CLAIMS:
86.70.89/52 Time 0.30 hrs.
Replace fuse and install label
COMP CODE: 7S1A
Normal warranty policy and procedures apply
REPAIR PROCEDURE:
DISASSEMBLY
1. Remove the storage tray in front of the transfer gearbox shift lever to gain access to the fuse panel.
2. Refer to the label on the bottom of the storage tray and locate fuse 16.
3. Remove 15 Amp fuse in location 16.
ASSEMBLY AND REPAIR
1. Install the 20 Amp fuse provided in service kit in fuse location 16.
2. Affix "16-20A" label supplied in the service kit over the Fuse 16 location of the existing label on the bottom of the storage tray.
3. Install the tray.
4. Refer to Figure 1 and locate the compressor ground lead attached to the RH front inner fender and disconnect.
CAUTION:
Make sure that the relocated ground wire is clear of the hood prop rod and the engine pulleys.
5. Install the removed ground lug under the lower bolt which secures the hood support pivot bracket to the body.
6. Tighten the bolt securing the AC ground to 9 Nm (80 lbf. in.).