What is this? 87 Supra hatch pass side

[NCSupraowner]

Has antenna type plug in it as well.

http://www.cygnusx1.net/Supra/Library/EPC/291420/catalog.aspx?F=8604&P=1

Still can't tell what it's called?

 

[Chambers]

I think its for the defrosters. Thats what the wires are running to, I have no idea what it is but it is weird it has a radio antenna connector.

 

[deabionni]

That's for the antenna that's built into the rear glass. (The lower lines at the bottom of the glass that look a bit different than the rest of the lines, is the AM antenna).

 

[martin p]

Some jdm had a rear screen mounted antenna, that looks similar too that, This is mine from my Ga-70.

 

[jetjock]

It's for the antenna. Like it says at the top of the Cygnus page....

 

[NCSupraowner]

I have poor reception even with a new antenna. Could this be the cause? It has seen some water damage from a leaking spoiler in the past.

 

[jetjock]

The car has two antennas, one in the hatch glass and the other a retractable mast. The stock radio switches between them for best reception. It's called a diversity antenna system. If you click on the Cygnus part number and scroll down you'll see it mentioned as "diver city" antenna, one of many mistranslations found in Toyota's documentation.

Anyway, if you no longer have the stock radio the odds are the glass antenna isn't even hooked up. However it can be connected with an adapter to a non-diversity receiver and it's possible a previous owner did that. It's how I've run for years. You'll need to check at the rear of the receiver to see if that's the case. More likely is you have a problem with the mast antenna, it's grounding, the cable, or the receiver itself.

 

[NCSupraowner]

Are there 2 seperate antenna connections behind the stereo then? It has an aftermarket stereo in it and I've replaced the power antenna with a new one.

 

[jetjock]

Sigh. Look at the Cygnus page *you* posted. Does it show two antenna connectors?

 

[modmonster2008]

hmm im thinking of removing that piece since its not even connected, what would i benefit if i were to install it on my Pioneer deck?

 

[NCSupraowner]

sorry..haven't had a car with a "diversity" antenna before. I'm wasn't confident the EPC was correct, but thanks for all the kind advice.

sigh.

 

[modmonster2008]

wait just to clear something, the rear defoggers are grounded onto the "diversity" antenna which connects to the chassis as a ground right? so if you remove it you must take the two wires grounded onto the antenna and ground it directly to the chassis using one of the 10mm bolts that hold the antenna in place, i was wondering, if i ground the two wires to the hatch without the antenna thing would the rear defogger still work?

 

[Evilempire1.3JZ-GTE]

No one side of the defroster is ground the other is 12vdc
on the antenna it is a single wire the one closest to the top of the back glass they are not the same wire.

 

[modmonster2008]

so what would happen if i connect the defrost ground wire and the antenna wire together would it have a bad effect?

 

[Evilempire1.3JZ-GTE]

yes reception would take crap. ground shields your antenna wire shorting it to ground would kill your signal.

shorting it to 12vdc though would do more damage though.

 

[modmonster2008]

so basically i should just take the diversity antenna wire off if i am taking the assembly off itself? like just leave the two thick defrost wires on and leave the 3rd wire for the antenna off?

 

[Poodles]

Why would you remove it?

 

[gtsfirefighter]

Why would you remove it?

Exactly. What's your rationale for removing it?