Finding the place where fuse for DAF 105 refrigeratoris located often becomes a primary task when the device suddenly turns off or does not respond when turned on. DAF truck owners who use refrigeration units are well aware that a failure of the cooling system can lead to damage to valuable cargo. That is why understanding the electrical circuit and the ability to quickly find a protective element is a critical skill for a driver or mechanic.
The problem is often aggravated by the fact that in the specifications of various modifications of refrigeration units, the location of the elements may vary. However, for the model DAF 105 there is a standard logic for placing electrical equipment, which allows you to systematize the search. In this article, we will analyze the algorithm of actions in detail, consider the possible causes of burnout and provide the exact coordinates of the location of fuses in various components of the system.
Do not panic if the refrigerator stops working immediately after starting the engine. Most often, the reason lies in a power surge in the on-board network of the tractor. Fuse acts as a buffer, taking the shock and preserving the integrity of more expensive components, such as the compressor or control board. Your task is to safely remove it, check its condition and, if necessary, replace it with a similar one.
Main reasons for fuse failure
Before you begin a physical search for the part, you need to understand why it could have blown. This will help avoid a repeat of the situation immediately after replacement. The main reason is short circuit in the wiring going to the compressor or evaporator fans. The vibration characteristic of the movement of the DAF 105 truck gradually grinds the insulation of the wires, which leads to contact with the body.
Another common problem is the starting current. At the moment the compressor starts, maximum power is consumed. If the relay contacts are oxidized or the compressor itself requires repair (jamming), the current increases above the nominal value and the fuse link inside the fuse burns out. It is also worth considering the quality of the installed element itself: the use of cheap analogues with the wrong rating often leads to false alarms.
- 🔌 Voltage surges in the on-board network of a DAF truck during generator operation.
- 🔌 Mechanical damage to wire insulation due to constant vibration of the body.
- 🔌 Moisture ingress into the electrical panel or control connectors.
- 🔌 Malfunction of the compressor itself, causing an excess of the starting current.
⚠️ Attention: If after replacement the fuse burns again within a few seconds, it is strictly forbidden to install an element with a higher rating. This will lead to melting of the wiring and possible fire. It is necessary to look for a short circuit.
Location of fuses in the electrical panel
The most likely place where the required element is located is the central electrical panel refrigeration unit. On DAF 105 trucks, refrigeration equipment is usually mounted in the front wall of the body or on the frame. The panel is a metal box, often with a transparent or metal cover secured with screws.
Open the panel cover. Inside you will see a number of fuses, relays and possibly circuit breakers. The fuse you are looking for is usually labeled FUSE or F indicating the amperage (for example, 10A, 15A, 20A). For the compressor power circuit, fuses with a rating of 15 to 25 Amps are most often used, depending on the power of the specific refrigerator model installed on the DAF.
Sometimes manufacturers install separate fuses for control circuits (12V) and power circuits (24V). Be careful during visual inspection: a burnt-out element is often visible to the naked eye - the thread inside the glass bulb or metal plate will be torn, and the glass may turn black.
Additional fuses on the control panel
If all the elements in the main panel are intact, the search should be continued on the control panels refrigerator itself. In some system modifications for the DAF 105, manufacturers integrate additional protection directly into the controller unit. This can be either a standard car fuse or a specific fuse.
To access the insides of the control panel, it is often necessary to remove the front frame. Proceed with caution, as plastic latches can become brittle over time and frost. Inside, next to the connectors for connecting temperature sensors, there may be a small fuse that is responsible for the logic of the controller. If it burns out, the panel simply won’t turn on.
Also check the connection points of the wiring harness coming from the DAF 105 cab to the body. Often an additional connector with built-in circuit protection is installed in this location. Oxidation of contacts in this area is a common cause of electrical problems.
How to check a fuse without a multimeter?
If you don’t have a tester at hand, you can visually inspect the transparent case for a broken thread. If the body is black or matte, there is definitely a break inside. You can also carefully replace a suspicious element with a known good one (of the same power) and check the operation of the system.
Tools for diagnostics and replacement
To carry out high-quality diagnostics and replacement, you will need a minimum set of tools. Having a good multimeter will significantly speed up the process and allow you to accurately determine the presence of voltage before and after the fuse. Without it, you are acting blindly, relying only on visual inspection, which is not always accurate.
You will also need screwdrivers (Phillips and flathead) for removing the shield covers, pliers for removing tight-fitting fuses and a set of spare parts of the appropriate rating. Don't forget about a flashlight, as you often have to look for parts in poor lighting conditions under the body or in the niches of the frame.
☑️ Repair tools
Step-by-step replacement instructions
The replacement process requires compliance safety precautions. The first step should always be power off. On a DAF 105 truck this is done by turning off the ground or disconnecting the battery terminals. Working under voltage in a metal body is dangerous.
After de-energizing, remove the faulty fuse. If it is tight, use a special extractor or pliers, being careful not to damage the contacts. Insert the new element until it clicks. Make sure that it fits tightly and does not loosen.
Turn on the power and check the operation of the refrigerator. If everything works, the problem is solved. If not, check the relays and contacts. It is important not only to replace the part, but also to understand why it burned out, so that the situation does not repeat itself on the way.
| Element type | Rating (A) | Case color | Location |
|---|---|---|---|
| Main power | 20-25 A | Yellow/Green | Main panel |
| Control circuit | 5-10 A | Red/Blue | Controller panel |
| Condenser fan | 15 A | Blue | Compressor shield |
| Temperature sensors | 3-5 A | Grey/Brown | Electronics unit |
⚠️ Attention: Never use “bugs” (wire, foil) instead of a fuse. This is a direct road to a fire in a DAF 105 truck, especially considering the flammable materials of the refrigerated body lining.
Prevention and care of electrical equipment
So that fuse for refrigerator DAF 105 serves for a long time and did not cause problems on the road, it is important to carry out preventive maintenance regularly. Inspect the condition of the wiring once a season. Pay special attention to the places where wires pass through metal partitions - the insulation is most often frayed there.
Use sprays to protect contacts from moisture and oxidation. Treating the connectors with a special compound will create a protective film that will prevent the ingress of water and salts, which is especially important in winter. Regular cleaning of the electrical panel from dust and dirt will also extend the life of the components.
Keep an eye on the tension of the compressor belts. If the belt is overtightened, the load on the compressor motor and, accordingly, on the electrical circuit increases, which can cause periodic current surges and burnout of the protection. Optimal tension ensures stable operation of the entire system.
Frequently asked questions (FAQ)
Is it possible to use a fuse of a higher rating if the standard one burns out?
No, this is strictly prohibited. Installing an element with a higher rating (for example, 30A instead of 20A) will lead to the fact that in the event of a short circuit, it is not the fuse that will burn out, but the wiring or the compressor itself, which can cause a fire.
Why does a new fuse burn out immediately after installation?
This indicates the presence of a short circuit in the circuit. The problem may be a broken compressor motor, a frayed wire shorting to ground, or a faulty relay. A complete wiring diagnosis is required.
Where can I get an electrical diagram for a specific refrigerator on a DAF 105?
The diagram is usually pasted on the inside of the electrical panel cover. If it is lost, look for a sticker with the model of the refrigeration unit (for example, Thermo King, Carrier, Zanotti) and find a manual for this model on the Internet or at an authorized dealer.
Does the condition of the tractor battery affect the operation of the fuse?
Yes, a faulty generator or voltage regulator can produce voltage surges, significantly exceeding the nominal 24V. This leads to rapid failure of the fuses and electronics of the refrigerator.