7mgte wiring guru's, see if you can figure this out please.

[nextproject]

I have figured out nearly all of the wiring necessary for my 7mgte ecu to run in my volvo, but there are two wires that i cannot figure out. They are located on a 6 pin connector containing 4 wires, this connector is in very close proximity to the fusebox (the other end of the connector actually leads into the fusebox, and i've identified 3 of the wires as relating to the efi main relay).

The two wires im trying to figure out are a blue wire with white stripe an a white wire with brown dots. the engine is a 1989 7mgte out of a supra, unfortunately for me i didnt bother to keep the fuse box, and all the wiring diagram's i've come across dont mention these two wires at all. Just need to know if they need to be hooked up to anything.

Here are some pics.

sorry for all the pics, and i'd normally just find a local mk3 to poke around under the hood of, but there dont seem to be any. so ive been stuck with bothering all of you guys with such a simple silly request. i think the only way i'll know what this goes to is if someone can find the elusive diagram which includes these wires. or maybe someone can trace em.

 

[figgie]

6 pin 4 wires....

the picture.. i see a black/red or orange wire. Those are 12v DC power wires. The blue white wires. usually signal from the ECU.

http://www.cygnusx1.net/Supra/Library/TEWD/MK3/manual.aspx?S=Main&P=47

I see the black red and black orange and blue whte there.....

 

[nextproject]

thanks for the link, i caught myself on one part of it, the fact that the EFI 15A fuse feeds the Black/Yellow wire as well as the power side of the relay. The blue/white wire you're referring to is for the Igniter, and that wire and the wire in the connector i'm referring to arent the same, there is no continuity between the two either, and there is no blue white wire at the ecu connector other than the one for the Igniter.

 

[nextproject]

Well i went and found that the blue/white wire travels from that connector to a blue round single-pin connector on the thermostat housing, pics to come soon, any ideas what this sensor is for? I imagine since it runs to the fuse box and not the ecu that its unnecessary for engine function? Maybe for one of the fans? (which i dont have, running my own 12" electric fan instead) Or maybe the coolant temp gauge? Some warning light? Coolant level sensor? Ideas?


here are the pictars.

Im sure its not for the gauge on the cluster because i just remembered i've already removed that sender and replaced it with the sender for my dakota digital e-fan controller. Here we go again.

 

[nextproject]

nothin huh? I've seen alot of pics of engine bays and some people have just installed plugs in these ports. Im assuming thats because of use of a programmable ECU. Im really leaning towards not even worrying about, especially since i now know that the wire coming out of that sensor doesnt even go back to the ecu.

 

[Scruggs86.5T]

The sensor is for the A/C fan, but I cant find anything saying that the wire is ran through the 6 pin connector. The white wire on the 6 pin connector is power for the anti theft horn that is in the engine bay by the brake booster.

 

[nextproject]

a/c fan well as long as we're all certain thats what its for, im certain that i dont need it. No a/c on my car, and not using any of the stock fans. So i will go ahead and cross that off my list of "wtf's". Thanks for your help!

 

[Scruggs86.5T]

Here's where I got the info on the sensor.
http://www.supramania.com/forums/sh...t-Housing&highlight=housing+sensor+thermostat

 

[nextproject]

Holy crap. Wow that pic is the most handy thing i've come across since i acquired my 7m. Thanks for the link. Its amazing how many people have these cars and modify the crap out of them but dont know what these sensors are for. Commited to memory as of now. Thanks again.