The Roadster’s Power Electronics Module (PEM) drives a DC SPAL cooling fan mounted beneath the rear trunk tub. Power (12 V) is delivered from the PEM to the fan through a plug/socket interface using automotive-grade terminals. These connectors were never intended for frequent disconnection during annual PM or PEM service, and over time they become a reliability risk.
The typical end state is burned pins, intermittent or failed PEM cooling, PEM cooling faults, and ultimately a vehicle shutdown if not corrected.
| Item | Detail |
|---|---|
| Application | Tesla Roadster 2.x — PEM to SPAL fan 12 V feed |
| Contents | Modified 90 degree PEM plug (PCB-mount interface), fan-side socket, terminals, seals (Mod prevents pin regression)) |
| Failure Symptoms | PEM cooling faults, fan inoperative/intermittent, heat-discolored or burned pins |
| Recommended Preventive Service | Replace PEM Cooling Fans every ~5 years |
This connector assembly replacement is one of many reliability items addressed during our PEM Upgrade/Rebuild Service.
Maintenance Tip: Replace the PEM Cooling Fans every 5 years. As these age, bearings drag, brush and commutator wear place additional current draw on an already marginally sized plug/socket combo, often resulting in eventual burnup of these parts.
