Electrical - Fuse 14 Blowing Intermittently

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Bulletin No.: T-92-84
File in Group: 8
Number: 147
Corp. Ref. No.: 218106
Date: April, 1992


SUBJECT:
FUSE 14 BLOWING INTERMITTENTLY


MODELS AFFECTED:
1988-1992 DE VILLES AND FLEETWOODS


Some 1988-1992 DeVilles and Fleetwoods may experience a condition of fuse 14 repeatedly blowing.

In an effort to reduce diagnosis time, the following conditions should be checked prior to performing normal diagnosis for a short to ground on circuit 240:

^ Shorted opera lamp
^ Short to ground in opera lamp, circuit 9, to sail panel.

Solid State Inverter (Sedan - integral to lamp):

To check for a shorted opera lamp, measure the resistance through the lamp contacts (with connector disconnected). Replace lamp if resistance is less than 50,000 ohms.

Single Inverter (Coupe - located in trunk):

To check for shorted opera lamp, measure the resistance through the lamp contacts to which the dark blue and white wires connect (with connector disconnected). Replace lamp if resistance is less than 20,000 ohms.

For warranty purposes use Labor Operation T6635 at .7 hour to replace one or both opera lamp(s).