Roadmaster Estate Wagon V8-305 5.0L (1991)
Horn Relay: Technical Service Bulletins
Horn Fuse/Horn Circuit - Identification Update
Bulletin 91-8-43
Date Sept. '91
Ref. No. 91-248-8A
Corp. Ref. No. 118116
SUBJECT:
SERVICE MANUAL UPDATE - SECTION 8A - ELECTRICAL DIAGNOSIS HORN FUSE AND HORN CIRCUIT IDENTIFICATION
MODELS AFFECTED:
1991 ROADMASTER ESTATE WAGONS
Some early 1991 Buick Roadmasters were built with Fuse 8 supplying battery voltage to the horn relay through Circuit 393. A change was made to
supply battery voltage to the horn relay from Fuse 1 through Circuit 40. Fuse 1 and Fuse 8 are both 15 amp fuses.
Please update the 1991 Service Manual art, component location, and Chart # 1 in the Service Manual Section 8A-40 Horns. Please update fuse block
details in Section 8A-11 Fuse Block Details.
