FORD CMAX Fuse question. 2014 Ford C-Max

ANSWER : Hello,
Ford (and other manufacturers as well) usually offer the small, specialized electrical parts for repairs such as you describe. Check with www.fordparts.com for your specific needs. For assistance with this project, I would recommend an electrical system problem inspection by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

ANSWER : Hi there. Typically when this issue occurs, damage will be instant – meaning if it’s going to damage the ECU, replacing the fuses would not help start the vehicle. So, at first glance, I would assume the ECU is OK. What is more likely is that you have an exposed wire somewhere that is causing the fuses to pop. Trying to diagnose these issues can be tricky sometimes, so it might be a good idea to have a professional mechanic complete an electrical problems inspection to isolate why you’re having these issues and recommend the right repairs.

ANSWER : Hello and thank you for contacting YourMechanic. The book says that you can use a 15, 20, 25, or 30 amp fuse. The power to the heaters are operated through the wiring to the main harness. There could have been a wire tied into it to make the seat work on the same circuit as the driver seat. This is common to find in the vehicles.

You can try putting a 15 amp fuse in the slot and see if the seat works. Try to avoid using a high amp fuse for if there is a problem with the heater you don’t want to burn it. If nothing seems to work, then the heater in the seat has failed and needs replaced.

If you need further assistance troubleshooting your vehicle, then seek out a technician, such as one from Your Mechanic, that can assist you with a seat inspection at your home or office. Best of luck.

ANSWER : For this, Silicone spray is one tool I personally like to use especially on rubber or silicone seals. The spray will leave a water-tight film on the electrical component and offers a moisture resistant coating. If you would like to have this checked, an expert, like one from YourMechanic can come to your car’s location to inspect the electrical system in order to scope the problem out and pinpoint any problems.

ANSWER : The information you are looking for should be in your owners manual. The manual will tell you where each fuse box is, describe the circuit each fuse controls and show the amperage rating of each fuse so when they are replaced the wrong one isn’t put in. If you do not have your owners manual, you may be able to find one at your local dealer and you may be able to order one from the internet as well. Fuse #30 should be a 10amp fuse that feeds power to the ac compressor clutch coil through the AC compressor relay. Consider hiring an experienced technician like one from YourMechanic who can come out to help you get the fuses right and offer a more personal diagnosis of your a/c concern if the problem was not just a fuse.

ANSWER : Hello. The fuse box is likely experiencing sone extra resistance. When resistance is high the amount of voltage that is allowed to limited. You may be able to find corrosion or another type of contamination that can be removed. You may not be able to access the damages. In this case you will have to replace the entire fuse box. When you replace the fuse box, you will want to make sure the fuses are good before you switch them from the old to the new unit. You may want step by step instructions or a repair manual.

ANSWER : Hi there. Which side of the fuse is getting the heat? Does it stay hot all the time? It is highly recommended to not install a higher rated fuse as this may cause system damage. If it’s the blower circuit side, there is excessive amperage draw on that side of the circuit. If it’s on the power side, then that is the side with the excessive amperage draw. On the power side, use a digital volt/ohm meter to perform a voltage drop test and see if there is excessive voltage drop. If there is excessive voltage drop, there is a resistance concern on that wire; it could be corrosion or a breakage in the wire. Perform voltage drop tests on the blower circuit wires and correct as necessary. The blower resistor could also be a source of the hot fuse concern. The blower resistor changes the resistance of the circuit based on fan speed selection prior to power getting to the blower. A fault in the resistor may be causing an excessive draw. I strongly suggest having a qualified technician perform an inspection to avoid replacing unnecessary parts. Your Mechanic has several available technicians that can assist you with an electrical problems inspection.

ANSWER : Hi there. It is highly probable that you have a faulty main relay or an exposed electrical connection or bad ground to the fuse panel that is causing this issue. However, it could also be problem with the ECU itself; which tends to be a problem with Audi’s and VW’s after 15 years or so. I would highly recommend having a professional mobile mechanic come to your location and complete a car is hard to start inspection, so they can correctly diagnose this problem and recommend the right repairs.