Technical Service Bulletin 21B05 — 2018 FORD EXPLORER POLICE INTERCEPT
ENGINE AND ENGINE COOLING
Bulletin Details
| TSB ID | 21B05 |
| Manufacturer | |
| Vehicle | 2018 FORD EXPLORER POLICE INTERCEPT |
| Component | ENGINE AND ENGINE COOLING |
| Communication Date |
Bulletin Summary
After extended idling, the high-speed cooling fan relay may fail in some of the affected vehicles. A failure will cause the fan to either continuously run or never turn on. A continuously running fan will increase the temperature of the relayâs connections (terminals) to beyond their design maximum. This may eventually create an electrical arc which heats and damages the relay terminals. Customers may experience a drained battery and a non-functional or even a melted/burned high-speed cooling fan relay inside the battery junction box (BJB). A damaged non-functional relay causing the fan to never turn on, may lead to engine overheating at idle.
About Technical Service Bulletins
A Technical Service Bulletin (TSB) is a document issued by a vehicle manufacturer to its dealers, describing a known issue with a specific vehicle or set of vehicles and the recommended procedure to fix it. Unlike recalls, TSBs are not mandatory and are typically only performed if an owner reports the related issue. However, TSBs can be an indicator of common problems with a vehicle.