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SINOTRUK HOWO Light Truck 24V Flasher Relay Light Control Module LG97004580021
Fault Symptoms and Troubleshooting Advice
1. Common Fault Symptoms: If the vehicle exhibits issues such as the turn signal remaining constantly lit without flashing after the switch is engaged, flashing at an abnormally fast or slow rate, or the left/right turn signals and hazard lights failing to illuminate entirely-and assuming the bulbs are not burnt out-the problem is typically caused by the aging of internal electronic components or stuck contacts within the flasher relay.
2. Replacement Instructions: This part is an OEM modular plug-in component. To replace it, simply locate the corresponding slot in the main power distribution box (usually situated behind the passenger-side glove box or within the center console), unplug the old unit, and plug in the new one. Be sure to disconnect the vehicle's main power supply before proceeding to prevent short circuits caused by improper handling.
This module is not merely a simple mechanical flasher relay; it has evolved into a multifunctional integrated control unit that encapsulates three distinct electrical functions
1. Turn Signal/Hazard Light Control (Flasher Module): Controls the pulse frequency of the vehicle's left and right turn signals and hazard warning lights (standard: 24V; rated current: 15A–20A).
2. Wiper Intermittent and Washer Control (Wiper Controller): Directly manages the intermittent speed of the front windshield wipers and the coordinated wiper operation triggered when the washer motor activates.
3. Central Speed Regulation and Circuit Protection (Relay Protection): Integrates solid-state circuitry with physical relay contacts, providing essential overload and short-circuit protection.
BOM (Bill of Materials) List for the LG97004580021 Flasher & Wiper Multi-Functional Controller
| Category | Part Number | Part Name (English) | Qty | Technical Description & Replacement Notes |
|---|---|---|---|---|
| Central Core | LG97004580021 | Flasher & Wiper Multi-Functional Controller | 1 | Core assembly. Also known as the "3-in-1 Controller". Controls turn signal flashing, hazard lights, and intermittent wiper speeds. |
| Input Controls | WG1664110031 | Combination Switch Assembly (Turn/Wiper) | 1 | The source control stalk. Worn internal contacts on this lever will prevent signals from reaching the controller. |
| Input Controls | WG9719580015 | Hazard Warning Light Switch (Double-Flash) | 1 | The primary dashboard dashboard switch to trigger hazard lights. Frequently replaced during cabin/dash repairs. |
| Circuit Protection | 24V-Fuse-15A | Turn Signal / Hazard Power Blade Fuse (15A) | 2 | Safety protection. Must be checked or replaced before plugging in the new controller to prevent immediate short-circuits. |
| Circuit Protection | 24V-Fuse-20A | Wiper / Washer System Power Blade Fuse (20A) | 1 | Located in the Central Fuse Box. Cooperates with the circuit to protect the controller from high-load burnout. |
| Actuators | YZ167174100006 | 24V Wiper Motor Assembly | 1 | Downstream execution hardware. A shorted wiper motor can draw excessive current and burn backward into the controller. |
| Actuators | WG1642710001 | Windshield Washer Pump (24V) | 1 | Receives the wash-and-wipe signal from the controller. Prone to burnout if run dry or frozen during winter. |
| Socket & Interface | WG9725580020-Plug | Central Fuse Box Module Socket / Harness Plug | 1 | Required for older trucks or vehicles that suffered wiring harness melting. Splice a new plug onto the harness if pins are burnt. |
DETAILS
| DESCRIPTION | 24V Flasher Relay Light Control Module Three-in-one controller | PART NUMBER | LG97004580021 |
| WEIGHT | 0.2kg | VOLUME | 50 mm × 50 mm × 25 mm |
| TRUCK MOLDE | SINOTRUK | QUALITY | Copy,High Copy, OEM,Original |
| MOQ | 1 | WARRANTY | 1 year |
| PAYMENT | TT/WESTEN UNION | SHIPMENT | by air/sea/railway |
| BRAND | SINOSACHS | PLACE OF ORIGIN | JINAN CITY,CHINA |
| STOCK | IN STOCK | APPLICABLE SITE | CHASSIS |
| PACKAGE | Carton/Woodenbox | PORT OF LANDING | Qingdao Port,China |
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