Trailer Harnesses - Installation and Part Requirements

Bulletin No. T 86-76
File in Group 8
Number 42
Corp. Ref. No. 618202
Date Aug. '86
SUBJECT: TRAILER HARNESSES

MODELS AFFECTED: 1986 ELDORADO AND SEVILLE


When wiring a 1986 Eldorado or Seville for trailer towing, two harnesses are required. The first harness, P/N 20622074, is installed in the trunk of the vehicle and interfaces with the vehicle's tail lamp harness. This harness provides protection of the turn/hazard module not offered by any other harness currently available. The use of any other harness for this purpose may cause damage to the turn/hazard module.

The second harness, P/N 2987124, mates with the first harness and is routed to the outside of the trunk where it is spliced together with the trailer's tail lamp wiring.