Video on the location of the 4WD (4x4) fuse and relay on Ford F150 pickup truck. If your 4x4 stopped working suddenly or if your F-150 is not shifting OR engaging to 4WD first thing to check would be the solenoid and 4x4 fuses and relays. ( 2004 | 2005 | 2006 | 2007 | 2008 | XL | XLT | LARIAT | 5.4 | SUPERCREW | CREW CAB | EXTENDED CAB | REGULAR CAB ). Give me your support and join the channel: / @quitealright There is couple of fuses and relays to check if 4x4 is not engaging. All fuses are in the main fuse box just next to the passenger right foot: FUSE #11: 4x4 solenoid FUSE #29: PCM 4x4 Power FUSE #30: PCM 4x4 Power FUSE #111: Power to 4x4 Relays Relays are located in a small junction box under the front hood: R01, R02 Thanks for watching, I hope this video was at least a bit helpful. Don't forget to Like the video / SUBSCRIBE to the channel! ⚠ DISCLAIMER: While QuiteAlright strives to make the information provided in this video as accurate as possible, it makes no claims, promises, or guarantees about the accuracy, completeness or applicability of the content. The videos are intended for information only. Follow the manufactures repair procedure and use appropriate safety procedures. No information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. All do-it-yourself projects entail some risk. It is the sole responsibility of the viewer to assume this risk. QuiteAlright is not responsible or liable for any loss damage (including, but not limited to, actual, consequential, or punitive), liability, claim, or any other injury or cause related to or resulting from any information posted in this video.