Tesla Roadster

PEM Fan Connector Upgrade

The Power Electronics Module (PEM) in the Roadster is cooled by a DC Spal Fan which resides under the rear trunk tub, and fed by 12 volts from the PEM through a plug/socket connection.

Automotive grade connectors are used, not meant to be repeatedly disconnected during annual Preventive Maintenance, or PEM repairs.

Three things play into failures in this vital connection:

  • The connectors are marginal or undersized based on current draw
  • Pin regression occurs at the 90° bend over time on the PEM plug as the connection is plugged and unplugged
  • Female pins on the fan cable socket get splayed with use, opening the connection making it harder to transfer sufficient current to the fan

The common failure mode is burned pins, and an inoperational PEM cooling function, initially throwing PEM cooling errors, and eventually shutting down the car.

We replace both connectors, and modify the PEM printed circuit board mount plug to eliminate pin regression. We also recommend replacement of this plug/socket combination, along with the PEM Cooling Fan, every 5 years.

The connector assembly replacement one of many items performed during the PEM upgrade/rebuild service

This PEM retrofit is performed in our electronics lab

PEM Rebuilds

QC Process

Component Repair

Tesla Service Center

Gruber Motor Company is an independent Electric Vehicle Service Center specializing in Tesla vehicles. Electric Vehicles are a developing transportation method. A new breed of Automotive Service Centers are emerging that more closely resemble electronics and software engineering labs. Gruber Motor Company has decades long experience servicing Critical Power equipment which is the same fundamental technology now found in Electric Cars.

Housed in an 8000 sq’ state of the art Service Center, we schedule you right in. We believe in old fashioned customer service, always ready to exceed your expectations. We can also handle low tech auto – tires, brakes, detailing, powder coating, clear bra, paint, and much more.

We are proud of our EV Service Center of the Future

Our EV Lab is where Software and Electronics repairs take place

Gruber Motor Company
203 West Lone Cactus
Phoenix, Arizona 85027
EV@GRUBER>COM

602-863-2655 X500

Gruber Motors