Introduction
The PCM (Powertrain Control Module) fuse and relay are vital components in ensuring the PCM operates smoothly. They act as gatekeepers for the flow of electrical power to the PCM, which is essentially the brain of your F-150’s engine. Having a good grasp of where to locate these essential components is key to effectively diagnosing and resolving any PCM-related problems that may arise in your F-150.
Understanding the PCM Fuse and Relay.
The PCM (Powertrain Control Module) in your Ford F-150 serves as the brain of the vehicle, receiving signals and data from various sensors to efficiently control the engine and transmission. However, if there are issues with the PCM, it can result in a range of problems, including difficulty starting the vehicle, poor engine performance, gear engagement issues, and increased emissions. Before jumping to the conclusion that the PCM is faulty, it’s crucial to check the PCM fuse and relay in your F-150.
Learn more about the location of PCM Fuse and Relay for other year models of the Ford F-150.
Where is the 1999 Ford F-150 PCM Fuse and Relay Located ?
In the 1999 Ford F-150, the PCM fuse and relay are located in two separate fuse boxes. In the under-dash fuse box, you’ll find fuse number 2, 20 and 30, which is assigned for the PCM power fuse. In the under-hood fuse box, there is a specific fuse labeled as fuse number 18, 23 and 24, designated for the PCM. Additionally, Relay 304 is assigned to the PCM diode and PCM relay, respectively, in the under-hood fuse box.
1999 Ford F-150 PCM Relay and Fuse Location.
In the 1999 Ford F-150, the PCM fuse and relay is located in the under-dash fuse panel.
In the 1999 Ford F-150, the PCM fuse and relay is located in the under-hood fuse panel.
1999 Ford F-150 PCM Relay and Fuse Location in Fuse Box Diagram.
Position of PCM Fuse in under dash fuse box as seen below pic.
Position of PCM Fuse and relay in under hood fuse box as seen below pic.
| Year | Fuse Function | Fuse No | Location | |
|---|---|---|---|---|
| 1999 | PCM power | 2 | Under Dash | Check more about Ford F-150 1999 Fuse Box Diagram and Location. |
| 1999 | PCM Power | 20 | Under Dash | |
| 1999 | PCM Power | 30 | Under Dash | |
| 1999 | PCM power | 18 | Under Hood | |
| 1999 | PCM Diode | 23, 24 | Under Hood | |
| 1999 | PCM Power Relay | 304 | Under Hood |
Conclusion
Familiarizing yourself with the location and function of the PCM fuse and relay can help you troubleshoot and address any PCM related issues efficiently.
WARNING: The terminal and harness assignments for individual connectors may vary depending on the vehicle’s equipment level, model, and market. It is recommended to refer to the fuse box diagram provided at the back of the fuse box cover for accurate information.
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