Cadillac ELR 2014-2016 Electrical System Bolt Torque Specifications

Proper torque ensures a secure and low-resistance connection, preventing overheating, voltage drops, and potential arcing. Under-tightening can lead to a loose connection causing resistance and heat, while over-tightening can damage the components and threads, leading to a failure. For example, improperly torqued connections in the high voltage battery system could lead to critical failure of the charging system.

Always refer to the official Cadillac ELR service manual for the 2014-2016 model year. These manuals contain the correct torque specifications for every bolt on the vehicle and are usually organized by system. Do not rely on generic torque charts as electrical connections may have very precise requirements. For the high voltage system, specific values are often provided in Nm, and need to be followed precisely.

A calibrated torque wrench is crucial. For most electrical connections, a smaller 1/4" or 3/8" drive torque wrench with lower torque range is often used. Digital torque wrenches offer more precision but manual click-type wrenches can also be used so long as they are in calibration. Using an impact wrench is not recommended for small electrical connections as over torquing is highly likely.

Generally, yes, you can re-use most electrical bolts, unless the service manual specifies otherwise. However, you MUST always inspect them for any damage, such as stretched threads or deformation. It is often advisable to replace bolts if they have shown signs of corrosion or have been subject to high torque or frequent removal. For example, battery cable connections and high voltage wiring connections usually benefit from new bolts due to corrosion concerns.

Failing to follow torque specs can lead to a variety of problems. Under-torqued connections can result in increased electrical resistance, overheating, and intermittent failures such as dash lights flickering. Over-torqued connections can damage threads, insulation, and sometimes even the component. In the worst case, this could lead to damage to the vehicle’s electric system and/or thermal runaway of the high voltage components such as the battery or charging system.