do these usually fail after 6-7 years I have it controlling my high and low beams and my lights will turn off for about 30 seconds then come back on

sounds like you maybe running more current than the relay is design for. A head light on a car can use 20 amps or more. Two lamps and you would be over the 30 amp rating.

I bought this b/c I need to run one remote 12v wire from my car stereo to several car amplifiers. Does it matter what terminal I use for each wire?

Your "supply" wire (Fused 12v from the battery directly typically) is going to always go to terminal 30. Your "output' wire will be terminal 87 to all of your amplifier remote on terminals. 85 and 86 are your switch path where one will get positive 12v (stereo output remote on trigger wire I believe) when you want to the relay to connect 30 to 87, and the other will get grounded.

just to confirm, base on the diagram, this is SPDT relay right?

Yes, this relay is a SPDT 20/30amp.

Controls electrical current. Keeps fuses from blowing. I use it with my running lights on my motorcycle.

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Metra Install E-123 Bay Tyco Relay 12 Volt 30 Amp Each

Product ID: 4086192

Details

Connector Type
Plug-In
Contact Material
Aluminum
Contact Type
Normally
Current Rating
30 Amps
Mounting Type
Screw Mount

⚡12V Coil Voltage

🔋30 Amp Current Rating

🔌Plug-In Connector Type

€ 22.23

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Description

⚡ Power up your projects with precision and reliability!

BUILT TO LAST - Tested for durability in real-world conditions, engineered for longevity
TRUSTED QUALITY - Backed by a 4.5-star rating from 189 satisfied users
PLUG PLAY DESIGN - Secure plug-in connector ensures quick, hassle-free installation
INSTALLER FRIENDLY FIT - Precision screw mount design tailored for professional ease
RELIABLE POWER CONTROL - Handles up to 30 Amps for seamless electrical performance

The Metra Install E-123 Bay Tyco Relay is a 12 Volt, 30 Amp plug-in relay designed for automotive electrical systems. Engineered for durability and ease of installation, it features a screw mount design and aluminum contacts for reliable, long-lasting performance. Highly rated by users, this relay ensures secure and efficient power switching in demanding environments.

Specifications

ASIN	B000P61E36
Best Sellers Rank	#959,305 in Automotive ( See Top 100 in Automotive ) #567 in Automotive Replacement Starter Relays
Brand	Install Bay
Brand Name	Install Bay
Coil Voltage	12 Volts
Connector Type	Plug-In
Contact Current Rating	30 Amps
Contact Material	Aluminum
Contact Type	Normally Closed
Current Rating	30 Amps
Customer Reviews	4.5 out of 5 stars 189 Reviews
Global Trade Identification Number	00086429006557
Included Components	30-Amp Tyco Relay
Item Type Name	PTRMECE123
Item Weight	1.28 ounces
Manufacturer	Metra Electronics
Maximum Switching Current	30 Amps
Maximum Switching Voltage	12 Volts
Minimum Switching Voltage	12 Volts (DC)
Model	E-123
Mounting Type	Screw Mount
Number of Terminals	2
Operation Mode	Automatic
Part Number	E-123
Specification Met	ABS
UPC	617407323412 086429006557 041114288748 163121248574
Unit Count	1.0 Count
Warranty Description	Check Manufacturer
Wattage	360 watts

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TrustScore 4.5 | 7,300+ reviews

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€ 22.23

Duties & taxes included

In stock

Sold byAmazon IrelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Ireland.

Secure transaction

ProDesertcart PRO

Fast, free shipping, member pricing & priority support.

Join PRO →

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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