Supporting Vendors / Dealers - Advertising - Shop

1968 Corvette: Service Bulletin: Heat Damage to Engine Wiring Harness

Subject:   Heat Damage to Engine Wiring Harness
Model and Year:   1968 Passenger Vehicles with 396 or 427 Cubic Inch Engine
Source:  Chevrolet Dealer Service Technical Bulletin
Bulletin No:  68-T-25
Section:   VIy
Date:  Feb. 19, 1968


The engine wiring harness on some early production 1968 passenger vehicles equipped with either the 396 or 427 cubic inch engine may be subject to exhaust manifold heat damage harness wires are not properly routed through the retaining clip located on the starter solenoid.  Reports have indicated that the yellow colored ignition or cranking by-pass wire, which attaches to the solenoid terminal closest to the exhaust manifold, is the wire most often damaged by exhaust manifold heat.  To prevent damage, the wire must be routed "loop-free" through the solenoid retaining clip to the solenoid terminal.

Effective November 27, 1967, the assembly plant is repositioning and taping the wiring harness on all Corvettes with either the 396 or 427 cubic inch engine as shown in figure 1.  Proper routing of the engine wiring harness through the retaining clip on all other passenger vehicles with the 396 or 427  engine is being more closely maintained at all assembly plants.

If heat damage to the engine wiring harness is encountered on subject 1968 Corvette models in the field, the harness should be taped as shown in figure 1.  If harness replacement is necessary, the new harness should be similarly taped at the time of installation.  All other 396 or 427 cubic inch engine passenger cars require only proper wire routing to avoid heat damage from the manifold.  This wiring should be checked for proper routing at the time of new car preparation.

PARTS AND LABOR DATA - Position and Tape Engine Wiring Harness 1968 Corvette 396 or 427 Cubic Inch Engine.

Chevrolet Motor Division
General Motors Corporation

1968 Corvette Engine Wiring Harness

0 (0)
Article Rating (No Votes)
Rate this article
Attached Files
There are no attachments for this article.
There are no comments for this article. Be the first to post a comment.
Security Code Security Code
Related Articles RSS Feed
1969 Corvette: Advance Information Inter-Organization Letter: Anti-Theft Audio Alarm
Viewed 1540 times since Sun, Oct 11, 2015
1971 Corvette: Service Bulletin: Anti-Diesel Relay
Viewed 994 times since Sun, Feb 8, 2015
1968 Corvette: Service News: 1968 Corvette 327 Cu. In. Engine Distributor Alignment
Viewed 2228 times since Sun, Jan 11, 2015
1968 Corvette: Service Bulletin: Holley Model 2300 Carburetor Revisions
Viewed 628 times since Tue, Aug 11, 2015
1973 Corvette: Electrical Schematics
Viewed 696 times since Sun, Jul 13, 2014
1982 Corvette: Service News: Fuel injection Diagnosis Chart
Viewed 1594 times since Sun, Oct 5, 2014
1969 - 1970 Corvette: Chevrolet Engineering Service Letter: Radio Service Update
Viewed 681 times since Sun, Sep 21, 2014
1982 Corvette: Service Bulletin: Spark Plug Fouling/Driveability Improvements
Viewed 3380 times since Fri, Aug 1, 2014
1973 Corvette: Electrical Schematic: Power Windows
Viewed 1347 times since Sun, Jul 13, 2014
1981 Corvette: ECM Codes
Viewed 1080 times since Fri, Aug 1, 2014