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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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)

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 current capacity

🔋12V low power consumption

⏱️15ms ultra-fast operate time

¥3339

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Upgrade your ride with relay power that never quits!

DURABILITY THAT LASTS - Rated for 100,000 electrical and 10 million mechanical operations—reliability you can trust.
PLUG PLAY SIMPLICITY - Color-labeled wires and socket mount design for effortless installation across vehicles.
POWERHOUSE PERFORMANCE - Handles up to 40 Amps for heavy-duty automotive demands.
LIGHTNING FAST SWITCHING - Operates in just 15 milliseconds to keep your systems responsive.
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 set designed for automotive, truck, van, motorcycle, and boat applications. Featuring a built-in diode for voltage spike protection, silver alloy contacts with ≤100mΩ resistance, and ultra-fast 15ms switching, it ensures reliable, long-lasting performance with up to 100,000 electrical cycles. Its compact design and color-coded wiring make installation seamless, perfect for professionals demanding durability and efficiency.

Specifications

ASIN	B078T8CMF6
Best Sellers Rank	#12,014 in Automotive ( See Top 100 in Automotive ) #5 in Automotive Starter Relays
Brand Name	Gebildet
Coil Resistance	100 Megaohms
Coil Voltage	12 Volts (DC)
Connector Type	Spade
Contact Current Rating	40 Amps
Contact Material	Silver Alloy
Contact Type	Normally Open
Current Rating	40 Amps
Customer Reviews	4.6 4.6 out of 5 stars (2,360)
Manufacturer	Gebildet
Maximum Switching Current	40 Amps
Minimum Switching Voltage	8 Volts
Model	E079
Mounting Type	Socket Mount
Operating Time	0.02 Seconds
Operation Mode	Manual
Part Number	E079
UPC	694090222994
Unit Count	2 Count
Upper Temperature Rating	70 Degrees Celsius
Wattage	480 watts

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