I received the jd2912 relays. what email address do i email?

You can contact son of wil through Amazon.

so in the picture the top red wire that is 87 goes to the motor to turn it on but it shows in the picture red turns to black and it is ground?

The red wire goes to the device that you want to turn on and the black to that Device

what gauge wire on battery terminals

I used a 14 gauge wire to the battery

I have a positively grounded (+ ground) system. The relay coil should still operate correct?

If you are stating the chassis is battery plus, then it should work, but would need to cycle your negative signals to control coils. John Deere 60 tractors have a positive chassis methodology, so might need to investigate how they operate to verify implementation.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Gebildet JD1912 Car Relay Harness 12V 40A 4 Pin SPST Harness Sockets with Color-Labeled Wires for Automotive Truck Van Motorcycle Boat (Pack of 2)

Product ID: 375776044

Details

Connector type
Spade
Contact material
Silver Alloy
Contact type
Normally Open
Current rating
40 Amps
Mounting type
Socket Mount

⚡40A high load capacity

🔋12V DC compatible

⏱️15ms fast operate time

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€ 24.17

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In stock

Sold byAmazon SpainDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Drive with confidence—power, protection, and precision in every relay!

QUICK RESPONSE RELAY - Fast 15ms operate and 10ms release times for instant switching.
DURABILITY THAT LASTS - Engineered for 100,000 electrical cycles and 10 million mechanical operations.
POWERHOUSE PERFORMANCE - Handles up to 40A load for robust automotive power needs.
SEAMLESS COMPATIBILITY - Works flawlessly with all 12V DC vehicles and devices.
BUILT IN VOLTAGE PROTECTION - Integrated diode safeguards your electronics from voltage spikes.

The Gebildet JD1912 Car Relay Harness is a 12V 40A 4-pin SPST relay socket set designed for automotive, truck, van, motorcycle, and boat applications. Featuring an integrated diode for voltage spike protection, silver alloy contacts with low resistance, and a robust lifespan of up to 100,000 electrical operations, it ensures reliable, fast switching with 15ms operate time. Compatible with all 12V DC systems, this pack of two harnesses offers durable, high-performance electrical switching solutions for professional-grade vehicle wiring.

Specifications

ASIN	B078T8CMF6
Best Sellers Rank	#29,710 in Automotive ( See Top 100 in Automotive ) #9 in Automotive Starter Relays
Brand	Gebildet
Brand Name	Gebildet
Coil Resistance	100 Megaohms
Coil Voltage	12 Volts (DC)
Connector Type	Spade
Connector type	Spade
Contact Current Rating	40 Amps
Contact Material	Silver Alloy
Contact Type	Normally Open
Contact material	Silver Alloy
Contact type	Normally Open
Current Rating	40 Amps
Current rating	40 Amps
Customer Reviews	4.7 out of 5 stars 2,222 Reviews
Manufacturer	Gebildet
Maximum Switching Current	40 Amps
Minimum Switching Voltage	8 Volts
Model	E079
Mounting Type	Socket Mount
Mounting type	Socket Mount
Operating Time	0.02 Seconds
Operation Mode	Manual
Part Number	E079
UPC	694090222994
Upper Temperature Rating	70 Degrees Celsius
Wattage	480 watts

Reviews

T**S

Belle qualité

Belle qualité de cable et relais efficace.

11.10.2025

K**I

こりゃダメだ。

説明通りだとACC電源違うしキーONしたらヒューズとぶし配線付け替えてもダメ。容量減るからつけなかったエーモンのリレー使ったら一発解決です。リレー自体に問題あるのかな…安物買いの銭失いでした。

7.03.2026

G**.

Good quality Relay

28.06.2023

M**K

Perfect for my Power Switching on my motorcycle accessories

4.05.2024

伊**男

いらないものです

テレビ📺が見れません

4.11.2025

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