Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your Velvac 70 Amp 4 Terminal Relay, model 091233. Please read this manual thoroughly before using the product to ensure safe and efficient performance.
Image: Velvac 70 Amp 4 Terminal Relay (Model 091233). This image shows the compact black relay unit with the Velvac logo, model number 091233, and 12V 70A rating, along with a basic wiring diagram indicating terminals 30, 86, 85, and 87.
Safety Information
Always observe the following safety precautions:
- Disconnect power before installation or maintenance.
- Ensure proper wiring and connections to prevent electrical hazards.
- Do not exceed the specified voltage (12V DC) or current rating (70 Amps).
- Consult a qualified professional if you are unsure about any installation steps.
- WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
Product Overview
The Velvac 70 Amp 4 Terminal Relay is a heavy-duty electrical component designed to manage high current loads in automotive and other 12V DC applications. It is ideal for powering accessories with high voltage draws.
Key Features:
- Voltage: 12 Volts DC
- Current Rating: 70 Amps
- Terminals: 4 Terminals (Normally Open)
- Mounting: Mounting Tab for easy installation
- Application: Suitable for fog lights, power windows, fans, and other high-draw accessories.
What's in the Box:
- Velvac Relay 70 Amp 4 Terminal (Model 091233)
Note: While some product descriptions may refer to a 'Heavy Duty Relay Kit', this manual specifically addresses the Velvac 70 Amp 4 Terminal Relay (Model 091233) as the primary component.
Setup and Installation
Proper installation is crucial for the relay's performance and safety. Follow these general guidelines:
- Preparation:
- Ensure the vehicle's battery is disconnected before beginning any electrical work.
- Identify a suitable mounting location for the relay that is protected from excessive heat, moisture, and vibration.
- Wiring Connections:
A typical 4-terminal relay (SPST - Single Pole Single Throw, Normally Open) has the following terminals:
- Terminal 30: Connect to the positive (+) power source (e.g., battery via a fuse). This is the input for the high-current circuit.
- Terminal 87: Connect to the positive (+) terminal of the accessory you wish to power (e.g., fog light, fan). This is the output for the high-current circuit.
- Terminal 85: Connect to ground (-) or the negative side of the control switch. This completes the coil circuit.
- Terminal 86: Connect to the positive (+) side of the control switch (e.g., ignition switch, toggle switch). This provides power to the coil.
Refer to the wiring diagram printed on the relay for specific terminal identification.
- Mounting:
- Secure the relay using its integrated mounting tab. Use appropriate fasteners (not included) to ensure it is firmly attached and does not vibrate loose.
- Testing:
- Once all connections are made and secured, reconnect the battery.
- Activate the control switch to test the relay's operation and ensure the connected accessory functions correctly.
Always use appropriately gauged wire for the current draw of your accessories to prevent overheating and ensure optimal performance.
Operating Instructions
The Velvac 70 Amp 4 Terminal Relay operates automatically based on the input from its control circuit. When the control circuit (Terminals 85 and 86) is energized, the relay's internal coil creates an electromagnetic field, which closes the internal switch, allowing current to flow from Terminal 30 to Terminal 87, thereby powering the connected accessory.
- Activation: Apply 12V DC to the control terminals (86 and 85) to activate the relay.
- Deactivation: Remove 12V DC from the control terminals to deactivate the relay, which will open the circuit between 30 and 87, turning off the accessory.
This relay is designed for continuous operation within its specified ratings.
Maintenance
The Velvac 70 Amp 4 Terminal Relay is designed for durability and requires minimal maintenance. However, periodic checks can help ensure its longevity and reliable operation:
- Visual Inspection: Periodically inspect the relay and its wiring for any signs of damage, corrosion, or loose connections.
- Cleanliness: Keep the relay free from dirt, dust, and moisture. Use a dry, clean cloth for cleaning.
- Connection Integrity: Ensure all terminal connections remain tight and secure. Loose connections can lead to resistance, heat buildup, and potential failure.
Do not attempt to open or repair the relay. If the relay is damaged or malfunctions, it should be replaced.
Troubleshooting
If you experience issues with your Velvac 70 Amp 4 Terminal Relay, consider the following common troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| Relay does not click when activated. | No power to control circuit (Terminals 85 & 86), faulty control switch, open circuit in wiring, or faulty relay coil. | Check fuse for control circuit. Test control switch for continuity. Verify 12V DC at Terminal 86 and good ground at Terminal 85. Replace relay if coil is open. |
| Connected accessory does not power on. | No power to main circuit (Terminal 30), faulty accessory, open circuit between relay and accessory, or faulty relay contacts. | Verify 12V DC at Terminal 30. Test the accessory directly. Check wiring between Terminal 87 and accessory. If relay clicks but no power at 87, replace relay. |
| Relay overheats. | Overcurrent condition (accessory draws too much current), undersized wiring, or faulty relay. | Ensure accessory current draw is within 70 Amp limit. Use appropriate wire gauge. Replace relay if it continues to overheat under normal load. |
| Intermittent operation. | Loose connections, corroded terminals, or internal relay fault. | Inspect and tighten all connections. Clean any corrosion on terminals. Replace relay if problem persists. |
If these steps do not resolve the issue, it is recommended to consult a qualified automotive electrician or contact Velvac customer support.
Specifications
| Attribute | Value |
|---|---|
| Brand | Velvac |
| Model | Relay 70 Amp 4 Terminal (091233) |
| Coil Voltage | 12 Volts DC |
| Current Rating | 70 Amps |
| Wattage | 840 watts |
| Number of Terminals | 4 |
| Contact Type | Normally Open (SPST) |
| Contact Material | Copper |
| Connector Type | Screw |
| Mounting Type | Panel Mount (with mounting tab) |
| Operation Mode | Automatic |
| Item Weight | 1.6 ounces |
| Product Dimensions | 1 x 1 x 1 inches |
| Manufacturer Part Number | 091233 |
| UPC | 728974077629 |
Warranty and Support
For information regarding product warranty, returns, or technical support, please refer to the official Velvac website or contact their customer service directly. Keep your purchase receipt as proof of purchase.
Velvac Official Website: www.velvac.com
Image: Velvac company logo. The logo features a stylized red and white 'V' symbol followed by the word 'VELVAC' in black capital letters.