MSD relay modules install easily into most automotive electrical systems where a high-amperage relay is needed, and work well with high-amperage electric fuel pumps and high-CFM electric cooling fans. Each of the 4 relays comes with a 40-amp fuse, though lower-amp fuses can be substituted if required, and a labeled, snap-on lid protects the main power stud and triggers from contamination or accidental contact.
Specifications:
- Part Type: Relay Control Module
- Channel Count: 4
- Output Rating: 40A per independent channel
- Supply Voltage: 7V to 20V
- Fuse Type: Low-profile JCASE
- Part Number: 7566-4
Configurable for single-wire activation with either a ground (-) or 12V (+) input by removing the tie-bar; LED status indicators show which channel is triggered.
FAQ
What's the difference between the 7566-2 and 7566-4?
The 7566-4 provides 4 independent 40A relay channels in one module, versus 2 channels on the 7566-2; both share the same electrical design and features.
What is the MSD 7566-4 used for?
It's a 4-channel relay module suited to high-amperage circuits such as aftermarket electric fuel pumps and multiple electric cooling fans.
How is each channel activated?
Each of the 4 channels can be configured for single-wire activation using either a ground or 12V input by removing the tie-bar.
