Single B/W wire that runs from fan area under battery..



3 connectors that are directly underneath engine compt fuse box..



2 connectors, again under battery. one is taped with blue tape, and the other is a white connector.

I am HOPING they were for the power steering and A/C, being that both units are removed from this vehicle. I recently redressed the harnesses with new loom, and cant remember if these were used in any way. I really dont think they were, but i just wanna play this one safe. This is an 88 Turbo II. Thanks! Brian

 

Looks like an S4. The third pic is of the CPU check connector for the diagmostic tool....or for properly placed LEDs.

 

Pic 2 is power steering, AC and adjustable suspension (you should find a matching unused connector over on the passenger side strut tower).
Pic 3 is initial set coupler, not sure what the blue taped one is.

 

i bet your car dones have a horn huh? cause umber one looks like the horn connection

 

haha, well jallenator, if we DID bet, i would have won. lol. horn works as advertised. its cool that some of these are taken care of.. now the question remains, what is in pic 1? i wonder if it would be a ground connecting the front left and right side for a/c like mentioned above. any ideas?

 

it looks like it might be the connection for the AC compressor... other than that I have no idea what that would be on an S4. it might also just be the diagnostic power plug.

 

Diagnostic power plug on a S4 is a green 6 prong clip but not with 6 wires if i recall correctly.

 

A/C?
what color is it?(the wire)

 

probe the wire in pic 1 and turn on the ac in the logicon and see if it gets 12v

 

Usually a blue taped connector is for an optional accessory. Fog lights would be my guess without actually looking at my FSM. Or perhaps headlight washers? I think Canada models had those.

 

on my S5 I have that green 6 prong one, and then next to it I have a single green one like that. it was just a 12V source.

 

In Pic 2 Im pretty sure the 2 connectors on the left go to your leading coil. The one on the right pops into a hole on the bracket for the fuse box. Never had anything actually connect to it in my car.

I could be wrong about above, but I know they definitely aren't the AAS plug, that one is black and on the other side of the strut tower closer to the firewall.

 

thanks for the help guys. got all these straightened out. fires up and runs beautifully. now, one final question that i stumbled upon today. looking down, directly to the right of the #2 rotor housing, theres a small black box (which im assuming is a resistor) with a single black wire. i tried to solder the wire where it broke from, which was right at the box. my question is if anyone knows that if this wire is used as a ground. because when checking continuity, the end of the wire and the loop where the mounting bolt goes through do not read when i check for continuity. therefore, if this IS a ground, i know that its not serving its purpose. can anyone verify this for me please?

 

The black box uses one the slave cylinder bolts to mount it to the bell housing.

 

right. but do ya know what that lil black box is for? i really dont want to run the car if its something important that i need to order. i just went through too much sh*t with this car for something dumb to happen to me now. haha

 

The black box is the condenser for the oil pressure gauge. I've heard it's there to prevent damage to the gauge in the event that the sender fails. I've also read that it may help prevent signal interference from the plug wires. I actually thought mine was missing for years, but recently found it relocated underneath my trailing coil.

 

Id hate to ask ya this after all youve helped with the wiring issue, but would you be able to disconnect the wire, and check continuity from the plug to ground for me and see what you get? as long as it doesnt serve as a ground, i think ill be fine. if it does, i need to start lookin for one.

 

Yours is still missing...there's a second condenser that mounts on the trailing coil bracket.
I have no idea what it's for but it's definitely not the pressure gauge circuit condenser.

 

Hmm. I'm going to have to check the wire color on it. The wiring diagram shows the wire for the oil pressure condenser as Y/R, so I'll compare.

It's an extra ground. Unless the oil pressure sender fails, the gauge grounds through the sender. If it fails, it will ground through the condenser. Take a look at page 50-40 in the S4 wiring diagrams. Be careful with the exposed wire too. If it gets touched to ground w/out the condenser, it could short out the gauge.

 

well, straightened out the interior, got it running, and so far so good. took it to work yesterday as a test run. nothing burnt up on me. however, (haha, always seems to be a "however" with this car), the anti-lock dummy light comes on as soon as i start moving, shift light comes on in 5th, and the reverse lights dont work. any quick fixes for these? and yup, the 5th/rev switch is hooked up.

 

For the ABS, maybe one of the wheel sensors isn't hooked up? I don't know exactly what switches the light on. Never had ABS to deal with on my cars.

If the reverse lights don't come on and the shift up light does in 5th, neither part of the 5th/rev switch is working. The 5th gear switch signal to the ECU prevents the shift up light from turning on in 5th gear. Mine comes on, but that's because I have a J-spec reverse-only switch. There's yet again an issue with your switch .

 

The condenser that is used on the ignition circuit is connected to a black/yellow wire. That black/yellow feeds the lead and trail coils power via the Main Relay.

In other words there's two of those condensers in the RX.

Oil pressure gauge and car run fine without the one connected to the oil pressure senders y/r wire.

And the B/W wire in one of your earlier pictures is for the A/C compressor.

 

topped off the brake fluid, and the abs light went away. thinkin ima have to bleed the brakes, they feel a lil funny the closer the pedal gets to the floor. ill check more into the 5th/rev switch tomorrow.