hey fellas iam in the process of getting my heat and ac in order on my 92 rs v6 5 speed iam start with the wiring ! heres a few pics of wires loose not connected. hope it helps me and others thanks heat wiring harness end dont know what this is iam thinking this is for the ac i have a few wires that are unplugged or cut thanks for the help !

is this supposed to be grouned? its my fuel pump relay wire !



what is this ?


what are these?


thanks again !

Second pic - that connector - not sure, but it may be the EST (Electronic Spark Timing) wire - if it is, this is what you disconnect when you need to change the timing - disconnect, start car, set base timing, turn car off, reconnect.

Third pic - the black cut wire - it's the ground for the blower fan - I think it connects to the relay that should be there.

7th pic - I beleive this is a sensor wire - should connect to something close to the center of the motor, at the top - something ay the carb, or another sensor that has a matching female connector.

8th pic - same as pic 7 - connects to a sensor or something on carb - or maybe the brake proportioning valve?

(sorry - it's been a long time since I've seen these)

Didn't help ya much I know - but maybe you'll find them.

7th pic - doesn't it connect on the top of the a/c compressor? I forgot, this is an 84, so a/c is on driver side

hey cb this is ony my 92 rs v6 3.1 5 speed daily driver ! my 84 is getting the lil 305 h.o. rebuild! thanks for the help i'll have better pic tomorrow when i get my car back !
thanks you a good help ! i hope more can help !

Your harness is officially hacked

Pic 1: HVAC connector
There should be another 4 pin flat connector that plugs into this on the HVAC box. Without it, the fan will never turn on and the AC will never engage

Pic 2: Alot going on here
The green connector is the MAP sensor. The gray single wire connector is TAC signal to the ECM. This must be disconnected each time you set timing and reconnected to run. The rest is not stock

Pic 3: Cut wires
Black/Red is power to the coolant fan from the relay. Due to proximity Id say the black is the fan ground

Pic 4: Relays
A 90-92 V6 should have 3 relays up there. AC clutch, Fuel, Fan. The stray connector is the fuel pump prime. Add 12V and the fuel pump will prime. The gray wire grounding to the bracket is not stock

Pic 5: Fuel pump wire
Unlike every other relay GM used, fuel pumps engage by adding 12V to the call wire (dark green/white). Gray is commonly the fuel pump relay output wire and powers your pump directly. It should not be attached to the call wire or grounded

Pic 6: Wierd connectors
Not stock, I dont knwo what that is. It looks like two headlight plugs stuck together

Pic 7/8: What are these?
AC clutch connector and AC high pressure switch connector. Front of the compressor and rear of the compressor

This is stock fuel control. I drew it for engine swap cars but you get the idea. The ECM call wire should be C1 A11

http://www.austinthirdgen.org/mkport...ta_sensors.jpg

Same thing for fan control. Call wire is C3 E8

http://www.austinthirdgen.org/mkport...an_V6_vinT.jpg

i know the car was at a pick n pull before i got it from the po the car was never in the yard but it was one of those for sale cars ! the car ran ok until the digital egr melted ! so now i gotta fix that and the fix the wiring !

If you need a replacement connector let me know, I can likely build that harness 3-4 times over with my pieces

oh cool thanks and how much trouble is it going to be to get a pic of the harness i need ? i grabbed one off a camaro but i dont think it will work on my car ! do you have any pics of what your harness looks like ?
and how much will you charge me for the harness !

I grab damaged/hacked V6/TBI harnesses and cut them down for engine swappers. I dont have any complete V6 harnesses

What areas do you need pics of

just for the part for the blower motor b/c i have part of a harness that looks like your in your pick but it dosent match parts in my car !

i guess tomorrow i can snap some pic of my whole wiring harness in my engine bay so we can have the big picture ! the harness seems to be missin the end by the blower motor !
let me know and thanks for all of your help pocket !

hey there pocket i took yester day afternoon and did a lil eletrical work and everything seems to check out after i got rid of the manual fan toggle and removed the map sensor to get a better look at the two headlight plugs by the map sensor .
i'll post more
pic to see if this makes sence to you iam thinking aftermarket ac !!!!

blower motor

ac lines

ac lines 2


condenser


condenser 2

more pics of the ac system

wireoff the top of the compressor


this is plug behind the map sensor





hey pocket hope this helps you as iam still learning thank for you help pocket !

I can tell you that someone screwed up your HVAC box as well. The top where it looks to be partially melted should only have one tube coming out. The condenser is wrong and the wiring is a nightmare

Heres an old pic of my LO3


Also I see the compressor has V belts. This is completely wrong. In 88 all 3rd gens went serpentine. I think someone swapped in a replacement engine and made due with that was there. Oddly enough the 90-92 digital 3.1 EGR is still there

This is a HVAC harness removed. Yours has alot of the old features, like the case fan ground. The red plate screwed to the box is actually a resistor pack. In my pics it is the large gray connector. Ive never seen one that style before. My friend's 79 even uses the same resistor as 3rd gens. I dont know what thats from but its ancient

Top right, moving left curving down:
Resistor connector
AC line pressure switch
Blower fan relay
HVAC to engine harness inline connector
blower fan connector


Compressor connectors with 4 pin HVAC connector


Under your compressor there is a 6 pin inline connector. These were not used by GM until the mid-late 90's. What this goes to I dont know but its not stock. Here is one I reused for my LSx cruise miniharness as reference

oh ok yeah i was cleanin the engine bay and its aftermarket ac made BY WYNN'S FROSTEMP ! FORTWORTH,Texas !
i found the tag today ! iam go goole in after i post pics !

pics











so i just google them and this is what i came up with !
http://www.google.com/search?hl=en&s...wyn&aqi=g-p1g9

hope this help someone good luck !

Whoever they are, they did a crummy job with the install

lol i wonder what it looked like new !
it might have looked get and maybe the po hacked it up ?
well as it sit it'll still wait for the one you have when you get ready i'll save it for my 84 z28 bc i know it has a stock one and it needs to be replaced !
iam just search on here and see if theres anyone with this kinda system i seen one guy had one in a fire bird when i goggled the company ! thanks for your help pocket iam sure it will help other as it did help me thanks again !

the box is not melted it looks to be all the i was wondering if anyone knew what the black stuff around the two pipes are ? it like as blackrubber sealer ! i think these one other person on here with this aftermarket system i there googlein them and got a few dead links uggghh!!

Pocket, that 6-wire connector you mentioned should be for the fuel injector harness on the 3.1... Just a heads-up.

Yes, that black stuff is a sort of insulator/sealer... I've seen it used on our home when they retrofitted our 200 year old house with central A/C... That crap is all over the place around the HVAC piping.

Either way, I can't imagine that fixing that mess is going to be anything short of a complete nightmare. Especially if the compressor goes belly-up or you want to charge it and use it. I'll bet they don't have a label as to how much R-12 (or R-134) goes into the system, do they? How did those people even DO that in the first place? That was a complete hack job!

:edit: I doubt it was an engine swap... It seems more like the car was one of those that didn't come from the factory with A/C and one of the previous owners REALLY wanted A/C some time in the past, so this no-name company retrofitted their crappy system into the car.

:edit: If you want to do the A/C system right, I have a blower housing up for grabs, but I'd rather not get rid of that part of my wiring harness.

Actually it isnt. 2.8's used a 4 pin flat weatherpack at the front/rear of the injector harness. 3.1's used a 4 pin flat in the front and 6 pin flat in the rear. These are standard universal weather pack connectors

The connector shown is a new style metripack

That's not what is on my 3.1 wiring harness I have laying out on my back porch... Just 1 connector for the fuel injectors (4 pins) and the CTS (2 pins)... I've also got a similar fuel injector harness from another 91 with a complete fuel rail from someone on here that was the same.

:edit: Unplugging that sucker for diagnosis is a real pain when installed right, BTW...

As seen here, you can see the factory bundled the A/C compressor wires up because the donor was a non-A/C car:

thanks mav and pocket for all the help !