DAF 105 truck owners often face the need for maintenance on-board equipment, and one of the key elements of comfort in the cabin is a self-contained or on-board refrigerator. When the device stops cooling or does not turn on at all, the first thing mechanics and drivers check electrical circuitis the integrity of the protective elements. Finding the place where the refrigerator fuse is located on a DAF 105 can turn into a real puzzle without an exact diagram, since the layout of the cabin of this car has its own unique features.
The problem of lack of power often lies not in the compressor itself, but in a burnt-out fuse element that protects the wiring from a short circuit. In this article, we will analyze in detail where exactly to look for this component, how to correctly diagnose the fault, and what rating to choose for replacement so as not to damage the tractor’s electronics. Understanding the device on-board network DAF XF 105 will help you quickly restore the functionality of the refrigeration unit and save food on the road.
It is worth noting that the arrangement of elements may vary depending on the year of manufacture and the configuration of the cabin, but the basic principles of the electrical circuit remain similar. We will look at the standard mounting locations for control and power distribution units specific to this truck model. It is important to act carefully, since incorrect intervention in the electrical system can lead to more serious problems with on-board computer.
Basic location of power supplies in the DAF 105 cabin
First, you need to determine which system your refrigerator is connected to. On the DAF 105 there are several areas where fuses for additional equipment can be located. Most often, power for on-board refrigerators (especially those built into a berth or mounted on a rack) is taken from the main mounting unit or from a separate panel located in the driver's access area. The main concentration of protective elements is the area behind the passenger's glove compartment or under the dashboard on the driver's side.
If you are looking for a fuse for standalone refrigeratorthat runs on its own battery, also check the battery connection area or the special climate control unit. In the DAF 105, there is often the practice of moving part of the fuses to an additional block located in a niche behind the passenger seat or in the technical compartment under the cab. To access the main unit, you will most likely need to remove the decorative panel from the end of the dashboard.
Do not forget that some refrigerator models have a built-in fuse directly on the power cord or on the back wall of the case. Carefully inspect the cable coming from the device: sometimes fuse link it is located in a transparent plastic cap directly on the wire, which simplifies diagnostics. If there are no obvious thickenings with a fuse on the cable, the search should be continued in the interior units.
⚠️ Attention: Before starting any electrical work on the DAF 105, be sure to disconnect the ground (power switch) to avoid short circuits or damage to sensitive electronics truck.
The location of the blocks may depend on the cabin modification (Space Cab, Super Space Cab). In newer versions of the DAF 105 with an updated instrument panel, the fuse box may be moved lower, closer to the pedal assembly. It is recommended to have on hand electrical equipment diagram specifically for your modification, since the colors of the wires and the numbering of sockets may differ from standard manuals.
Search for a fuse in the mounting block (FUSE BOX)
Main The DAF 105 mounting block is the central unit where most fuses and relays are located. To get to it, you need to open the passenger seat glove compartment or remove the side panel, depending on the year of manufacture. Inside you will see rows of fuses of different colors and sizes. To find the right item, you will need a diagram pasted on the inside of the unit cover or printed in the instruction manual.
Look for symbols associated with additional equipment. On DAF diagrams this may be marked as AUX, CIG (cigarette lighter, to which refrigerators are often connected), FRIDGE or EXTRA. The fuse rating for a refrigerator is usually between 10 and 20 amps, depending on the power of the compressor. If you do not find a clear “refrigerator” designation, check the cigarette lighter circuit, since many drivers power portable devices through it.
- 🔍 Visually inspect all fuses: a blown element often has a blackened body or a torn metal thread inside.
- 🔌 Use a multimeter to check for continuity of suspicious ones fuses, if a visual inspection does not produce results, the integrity of the circuit may be impaired imperceptibly to the eye.
- 📋 Check the color of the fuse with the legend on the cover of the block: yellow is usually 20A, blue 15A, red 10A, but the colors may vary depending on the manufacturer.
In some cases, the fuse may look intact, but not work due to oxidation of contacts in the socket itself. Try carefully removing the suspect fuse and inserting it back to clean off the oxides, or replace it with a known good one of the same rating. Remember that using a fuse of a higher rating is strictly prohibitedas this can lead to melting of the wiring and a fire.
Additional blocks and control relays
If the fuse is not found in the main unit or it is intact, but the refrigerator does not work, you should pay attention to additional relays and control units. The DAF 105 is often equipped with relay groups to control high-power consumers. The refrigerator relay can be located separately, for example, in the driver’s foot area or under the sleeper block. A click of the relay when the power is turned on will indicate its serviceability.
It is also worth checking climate control unitif the refrigerator is integrated into the cabin air conditioning system (rare, but found in special versions). In this case, the fuse may be located in the fan or climate compressor control circuit. Access to the lower blocks may require partial disassembly of the panel, so proceed carefully with the plastic latches.
The system DAF Multiplexdeserves special attention. In modern trucks, power management can be done through intelligent modules. If you have just such a system, then there may not be a classic fuse in the usual sense, and the protection is implemented electronically. In this case, to reset the error, diagnostics may be required through a special connector.
Diagnostics of the refrigerator power circuit
Before changing fuses at random, it is necessary to carry out proper diagnostics. Take your multimeter and set it to DC voltage measurement mode. Connect the black probe to ground (metal part of the body), and touch the red one to the contacts in the fuse socket. When the ignition or power is on, there should be on-board voltage at one of the contacts (about 24 Volts for DAF 105).
If there is no voltage at any contact, the problem may be higher up the circuit - in the main switch or battery wiring. If there is voltage, but the refrigerator does not work, check the second contact (consumer output). To do this, you can use a test lamp or ring the circuit to the refrigerator connector. Often a break occurs where the wire bends or where it passes through the metal partitions of the cabin.
The table below shows typical fuse ratings for various DAF 105 systems that may be associated with refrigeration equipment:
| System / Designation | Typical rating (A) | Color (standard) | Location |
|---|---|---|---|
| Cigarette lighter (CIG) | 10 - 15 A | Blue / Red | Main block |
| Add. equipment (AUX) | 20 - 25 A | Yellow / White | Add. block |
| Cabin ventilation | 15 - 20 A | Blue / Yellow | Main unit |
| Control unit (ECU aux) | 5 - 10 A | Orange / Red | Relay Compartment |
Use this chart as a guide, but always refer to your truck's specific circuit diagram. Ratings may vary depending on optional equipment installed. An incorrectly selected fuse can cause unstable operation electronic units of engine or transmission control.
Replacing the fuse and checking operation
After you have found a burnt out element, it must be replaced. To remove fuses in the DAF 105, special plastic tweezers are often used, which are attached to the block cover or lie nearby. If you don’t have tweezers, use needle-nose pliers, but be very careful not to damage the socket contacts or drop a metal object inside the unit.
Install a new fuse of strictly the same rating and color. After installation, turn on the power and check the operation of the refrigerator. If the device works, the problem is solved. If the fuse burns out again after a few seconds or minutes, it means that there is a short circuit in the circuit or the refrigerator compressor itself is faulty.
☑️ Check after replacement
Pay attention to the state of the contacts in the socket. If they are blackened or melted, simply replacing the fuse will not be enough - you will need to clean the contacts or replace the entire socket. Oxidized contacts create additional resistance, heating and re-blowing of even a working fuse.
⚠️ Attention: Never use “bugs” (wire instead of a fuse) or foil. This is a direct path to fire in the DAF 105 wiring, which is designed for a strictly defined current load.
Frequent problems and prevention tips
One of the common causes of blown fuses on the DAF 105 is vibration. Constant shaking leads to weakening of contacts and micro-tears, which cause sparking. It is recommended to periodically check the tightness of the fuses in the sockets, especially after long trips on bad roads. For reliability, you can use contact lubricant for electrical connectors.
It is also worth mentioning the problem of voltage surges in the on-board network of the truck. A faulty generator or relay regulator can produce increased voltage, which leads to massive failure of lamps and fuses. If you often have fuses of different circuits burning, check charge voltage batteries with the engine running - it should not exceed 28-29 Volts.
- 🛠 Always carry with you a set of spare fuses of different ratings (assorted), so how to find them on the road can be difficult.
- 💧 Make sure windows and hatches are sealed: water getting into the fuse box is a common cause of short circuits and contact corrosion.
- 🔌 Use only high-quality fuses from well-known brands (for example, Bosch, Hella), cheap analogues may not meet the declared characteristics melting.
Regular maintenance of the DAF 105 electrics will extend the life of not only the refrigerator, but also the entire electrical equipment of the truck. Cleanliness in the cabin and the absence of moisture are the key to reliable operation of all systems.
Conclusion and important conclusions
Finding and replacing the refrigerator fuse on a DAF 105 is a task that requires care and understanding of the basics of electrical engineering. The main rule: never ignore a blown fuse, as it indicates a problem in the circuit. Correct diagnosis, use of tools and adherence to ratings will allow you to quickly resolve the problem.
Remember that the DAF 105 electrical system is complex and interconnected. Interfering with one circuit may indirectly affect others. If you are not confident in your abilities or the problem recurs repeatedly, it is better to contact qualified electricians who specialize in trucks.
Frequently asked questions (FAQ)
Is it possible to use a fuse of a higher rating if the required one is not available?
No, absolutely not. The wiring is designed to carry a certain current. Installing a more powerful fuse will lead to the fact that in the event of a short circuit, the wire will burn out before the protection operates, which can lead to a fire in the cabin.
Why does the refrigerator only work when the engine is running?
This may indicate a low battery charge or a malfunction in the power circuit, which cannot withstand the load at low voltage. It is also possible that the refrigerator is connected through a relay that is activated only when the generator is running (D+ signal).
Where can I get a fuse diagram for a DAF 105 of a particular year?
The diagrams are usually found in the car's operating manual, on the inside of the mounting block cover, or on specialized forums for DAF owners. Diagrams can also be found at official dealerships.
What to do if the new fuse burns out immediately?
This is a sign of a short circuit. It is necessary to turn off the refrigerator and check the wiring for chafing, especially where it passes through metal. Also check the refrigerator compressor itself for breakdown.