Ensemble logique de lampe de lecture FAW: Une analyse critique du 2 Composants de base pour l'accent mis sur le conducteur

Bienvenue dans ce guide technique critique sur le Ensemble logique de lampe de lecture FAW (Assemblée 566). C'est le complet, haute efficacité, focused illumination system for the driver and passenger areas of the FAW Jiefang CA4251P66K24T1A3E5 6×4 tracteur semi-remorque diesel. This assembly is a critical component for driver comfort, sécurité, and in-cab functionality.

Le Ensemble logique de lampe de lecture FAW est un “logique” system designed to provide targeted, low-glare light, allowing the driver or passenger to read logbooks, maps, or tablets without illuminating the entire cab. Ce “logique” is distinct from the main “dome light” (Assemblée 565), as its primary purpose is to prevent glare on the windshield and avoid disturbing a co-driver in the sleeper berth.

Ce guide détaillé est une ressource essentielle pour les techniciens professionnels et les spécialistes des pièces.. Nous déconstruirons l'ensemble Ensemble logique de lampe de lecture FAW dans son 2 core component types (un total de 6 pièces). Nous analyserons les critiques “logique” of the ‘Reading lamp assembly’ (3714050-91W-C00), its likely LED construction, its integration with the cab’s electrical system, et le spécifique, vibration-proof ‘Self-tapping screw’ (CQ2714816) fasteners used to mount it.

Composant principal 1: The ‘Reading Lamp Assembly’ (3714050-91W-C00)

Le coeur du Ensemble logique de lampe de lecture FAW is the ‘Reading lamp assembly’ (3714050-91W-C00). La liste des pièces en appelle deux, one for the driver and one for the passenger, typically mounted in the headliner or A-pillar.

This component is a sealed, integrated lamp unit. C'est “logique” is to provide a very specific *type* of light:

• **Focused Beam:** Unlike a “dome light” which floods the cab, ce Ensemble logique de lampe de lecture FAW uses a projector lens or a deep-set reflector. Ce “logique” creates a tight, narrow “spot” of light.
• **Glare Prevention:** This focused beam is critical for safety. It’s designed to illuminate a small area (like the driver’s lap or logbook) *without* casting any stray light onto the windshield, which would create a dangerous, vision-blocking glare while driving at night.
• **Co-Driver Comfort:** In a “team driving” scenario, this focused “logique” allows one driver to rest in the dark sleeper berth while the co-driver navigates or does paperwork, without being disturbed by a bright cabin light.

**Construction and “Logique” of Illumination:** Le Ensemble logique de lampe de lecture FAW is almost certainly an **LED (Diode électroluminescente)** unité. C'est un point critique “logique” choix pour plusieurs raisons, especially compared to old incandescent or halogen bulbs:

* **Consommation d'énergie (The Primary Logic):** This is the most important factor. A driver often uses interior lights with the engine *off*, relying solely on the truck’s batteries (voir Assemblée 556). A traditional incandescent bulb draws a high amount of amperage, which can easily drain the batteries. Le Ensemble logique de lampe de lecture FAW, by using low-draw LEDs, provides bright, focused light for a fraction of the power, protecting the batteries and ensuring the truck will start in the morning. * **Résistance aux vibrations:** The cab of a truck is a high-vibration environment. The fragile filament of an incandescent bulb would constantly break, leading to high maintenance. Une LED est un état solide, “antichoc” appareil sans filament, making it virtually immune to vibration from the engine or road. * **Chaleur:** An incandescent bulb gets dangerously hot. Le Ensemble logique de lampe de lecture FAW, using cool-running LEDs, produces almost no heat, making it safer to touch and preventing it from melting the plastic headliner it’s mounted in. * **Durée de vie:** The LED light source is designed to last for tens of thousands of hours, souvent toute la vie du camion, making this a “ajuster et oublier” composant d'entretien. A reliable Ensemble logique de lampe de lecture FAW is a key part of driver-focused design.

Le “Logique” of Integration: Electrical Control

While not explicitly detailed in this parts list, le Ensemble logique de lampe de lecture FAW is part of a wider “logique” network within the cab’s electrical system. The ‘Reading lamp assembly’ (3714050-91W-C00) does not function in isolation.

**1. Power Source:** Le Ensemble logique de lampe de lecture FAW is wired into the truck’s 24V “corps” circuit, which is powered by the ‘Battery And Mounting Bracket Assembly’ (Assemblée 556). C'est un “constant-hot” circuit, meaning it has power even when the truck’s ignition key (the ‘FAW Start Switch’, Assemblée 558) is in the “OFF” position. C'est le “logique” that allows a driver to use the lights while resting or searching for items with the engine off.

**2. Interface de contrôle:** Le “logique” of control for this specific lamp is typically “local.” The lamp assembly itself contains an integrated “local” changer (Par exemple, a push-button, a rocker switch, or the lens itself acts as a push-button). This allows the driver or passenger to operate their respective light manually and independently, separate from the main “dome” ou “courtesy” lumières.

**3. Distinction from Courtesy Logic:** Unlike the ‘Sleeper Lighting Assembly’ (Assemblée 564) or the ‘Interior Lighting Assembly’ (Assemblée 565), le Ensemble logique de lampe de lecture FAW is *not* usually tied to the “porte ouverte” circuit. C'est délibéré “logique” choix. The courtesy lights are designed to turn on *automatically* when a door is opened. A reading light is designed to be *manual*, so it only comes on when the driver or passenger explicitly requests it. This prevents the bright, focused beam from activating every time the door is opened, which would be distracting and unnecessary. This specialization is the key “logique” de la Ensemble logique de lampe de lecture FAW.

Composant principal 2: Le système de fixation (CQ2714816)

The second component of the Ensemble logique de lampe de lecture FAW is the hardware that mounts it: la vis autotaraudeuse à tête cylindrique à empreinte cruciforme’ (CQ2714816). La liste des pièces en appelle quatre, which is a pair of screws for each of the two ‘Reading lamp assembly’ unités.

Cette fixation est un élément clé de l'installation “logique” pour le Ensemble logique de lampe de lecture FAW.

**1. Autotaraudeuse “Logique”:** Le “autotaraudeuse” (Vis autotaraudeuses) design is a critical manufacturing and service feature. These screws are designed to be driven directly into an unthreaded hole in the truck’s “headliner” (the interior cab roof panel) or its underlying composite/metal support structure. The screw’s hardened threads cut (ou “robinet”) their own mating threads as they are installed. Ce “logique” creates an extremely tight, précis, and vibration-resistant fit without requiring a separate nut or pre-threaded boss, which would be impossible to access.

**2. Tête panoramique “Logique”:** Le “tête panoramique” (pantou) design is also a specific “logique” choix. This type of screw head is flat on the bottom with a wide diameter. When tightened, it distributes the clamping force over a wide area of the Ensemble logique de lampe de lecture FAW‘s plastic mounting flange. UN “fraisé” (tapered) screw would act as a wedge and instantly crack the plastic housing. Ce “tête panoramique” logic prevents stress fractures and ensures the lamp is held *snug* against the headliner, preventing any annoying “bourdonne” ou “rattles” de la Ensemble logique de lampe de lecture FAW while the truck is in motion.

A failure of these simple fasteners would cause the Ensemble logique de lampe de lecture FAW to vibrate, eventually leading to a broken wire or the lamp detaching from the ceiling. Donc, using the correct OEM-specified fastener is essential for a long-lasting, calme, and reliable repair.

FAW Reading Lamp Logic Assembly Parts List

Le tableau suivant fournit l'intégralité, ventilation détaillée de tous 2 types de composants (totalisant 6 pièces) identified in the ‘Reading Lamp Logic Assembly’ (566) schéma du tracteur FAW CA4251P66K24T1A3E5.

Spécifications techniques et contexte d'assemblage

Les spécifications pour le Ensemble logique de lampe de lecture FAW are defined by its function as a low-power, high-reliability, focused interior illumination system. Le Ensemble logique de lampe de lecture FAW is a key component for driver comfort and in-cab functionality.