Escalade AWD V8-6.2L (2009)
Circuit Protection - Fusible Links
Circuit Protection - Fusible Links
Fusible link is wire designed to melt and break continuity when excessive current is applied. It is often located between or near the battery and starter or
electrical center. Use a continuity tester or a DMM at each end of the wire containing the fusible link in order to determine if it is broken. If broken, it
must be replaced with fusible link of the same gage size.
Repairing a Fusible Link
Note: Fusible links cut longer than 225 mm (approximately 9 in) will not provide sufficient overload protection.
Flat Wire Repairs
Flat Wire Repairs
Caution: The flat wire within the flex wiring harness is not serviceable. If an open or short exists within the flex wiring harness the complete harness
must be replaced.
GMLAN Wiring Repairs
GMLAN Wiring Repairs
Special Tools
J-38125 Terminal Repair Kit
The GM Local Area Network (GMLAN) System requires special wiring repair procedures due to the sensitive nature of the circuitry. Follow the specific
procedures and instructions when working on GMLAN connectors and terminals.
The tool kit J-38125 contains the following items in order to repair the GMLAN wiring:
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DuraSeal splice sleeves
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A wire stripping tool
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J 38125-8 Crimping Tool
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J 38125-5 Ultra Torch Special Tool
The DuraSeal splice sleeves have the following 2 critical features:
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A special heat shrink sleeve environmentally seals the splice. The heat shrink sleeve contains a sealing adhesive inside.
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A cross hatched (knurled) core crimp provides necessary contact integrity for the sensitive, low energy circuits.
The J-38125 also serves as a generic terminal repair kit. The kit contains the following items:
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A large sampling of common electrical terminals
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The correct tools in order to attach the terminals to the wires
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The correct tools in order to remove the terminals from the connectors
GMLAN Repairs
Note: When making a repair to any GMLAN network, the original wire length after the repair must be the same length as before the repair. If the
network is a twisted pair, the twist must be maintained after the repair is completed.
GMLAN has 2 types of networks, low speed and high speed. Low speed GMLAN has a single wire and works at slow speeds. High speed GMLAN has 2
wires in a twisted pair and works at higher speeds. For more information on GMLAN, refer to Data Link Communications Description and Operation (
See: Powertrain Management/Computers and Control Systems/Information Bus/Description and Operation).
GMLAN Connector Terminal Repair
Note: A service terminal can be used to replace damaged connector terminals for both high speed and low speed GMLAN systems. When making a
connector terminal repair on a GMLAN high speed system with twisted pair wires, do not untwist the wires more than necessary to make the repair.
The terminals in the GMLAN system are made of a special metal. This metal provides the necessary contact integrity for the sensitive, low energy
