Losing my mind, Electrical Issue, Heated Seats

Truck: 2017 Toyota Tacoma TRD Sport

Mileage: 330,000KM

What I already tried: Changing Relay beside steering wheel. Checking all plugs under seat to make sure everything is seated and Checked all fuses under steering wheel and under hood.

Issues:

So I’ve been having some sort of electrical issue with my heated seats.

They’ll work for a couple weeks and then stop working for a few weeks and randomly start working again.

When they stop working, both seats will not work, even though I rarely used the passenger side heated seats.

The passenger side heated seats probably have less than 1 hour of use on them.

I have checked every single fuse under the steering wheel and under the hood, with a multimeter for continuity, Nothing is blown.

I even bought a new relay for the heated seats and installed it in the relay beside the steering wheel.

I will attach a pic of the relay I changed.

Even with all of that the heated seats would not work and now randomly they started working again.

This has happened a few times where the heats will not work for a couple weeks and then randomly start working again.

I even checked all the cabling underneath the seat and everything is plugged in tight.

I am losing my mind.

Can anyone help me diagnose and fix this issue?

Has anyone had this issue before?

Truck: 2017 Toyota Tacoma TRD Sport

Mileage: 330,000KM

What I already tried: Changing Relay beside steering wheel. Checking all plugs under seat to make sure everything is seated and Checked all fuses under steering wheel and under hood.

Issues:

So I’ve been having some sort of electrical issue with my heated seats.

They’ll work for a couple weeks and then stop working for a few weeks and randomly start working again.

When they stop working, both seats will not work, even though I rarely used the passenger side heated seats.

The passenger side heated seats probably have less than 1 hour of use on them.

I have checked every single fuse under the steering wheel and under the hood, with a multimeter for continuity, Nothing is blown.

I even bought a new relay for the heated seats and installed it in the relay beside the steering wheel.

I will attach a pic of the relay I changed.

Even with all of that the heated seats would not work and now randomly they started working again.

This has happened a few times where the heats will not work for a couple weeks and then randomly start working again.

I even checked all the cabling underneath the seat and everything is plugged in tight.

I am losing my mind.

Can anyone help me diagnose and fix this issue?

Has anyone had this issue before?