ISSUED 9/17/82



CATEGORY:     TECHNICAL

ATTENTION:    ALL DMC DEALERS/SERVICE MANAGERS

SUBJECT:      TEMPORARY WIRING MODIFICATION - FAN FAIL
              MODULE




Reports have been received that a number of fan fail
modules have become defective which renders the engine
cooling fans inoperative.  Upon preliminary investiga-
tion, a manufacturing defect has been discovered in
some modules.  While further investigations are being
conducted with the manufacturer to determine the exact
origin of this problem, we recommend the vehicle be
kept mobile with the use of a link wire assembly if
this condition is encountered.

Use of this link wire assembly will bypass the fan fail
warning light function of this system thus leaving the
engine temperature gauge as the only means of indicating
an engine overheating condition.

It is important to positively determine that the fan
fail module is defective prior to installing this link
wire assembly.  A check should be made on the cooling
fans to ensure they have not seized.  The entire engine
cooling fan circuit and components must also be checked
for continuity and operation with special attention to
all connections (Figure 1).

IMPORTANT:

Owners must be advised that this temporary modification
has been performed, the fan fail light is inoperative
and that the engine temperature gauge should be routine-
ly monitored.


                                         Continued




Installation


1)  Gain access to the relay panel under the parcel shelf behind
    the passenger's seat.

2)  Locate and remove the blue fan fail module as indicated in
    Figure 2.

3)  Firmly install the link wire assembly into the appropriate
    cavities of the fan fail module plug of the relay panel as
    indicated in Figure 3.



Reimbursement


Submit DMC Service Transaction (General) using:

     Transaction Code:          20 (Warranty Claim)
     Component Code:            37414
     Malfunction Code:          30
     Labor Operation:           37403
     Labor Time Allowance:      .2 hr.
     Part Number:               113189 - Link Wire Assembly

Please inform all personnel concerned.






J. J. Patro
Technical Publications Manager

JJP/psg

Attachment








                                                    Attachment - Page 1
                                                    Bulletin ST-06-9/82