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AC/HEATER rehook up
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Author:  86d100 [ Sun Jun 20, 2021 5:42 pm ]
Post subject:  AC/HEATER rehook up
Hello all,

I have any 86 Dodge D100 with a slant six that i believe to originally have ac (someone replaced the motor with a 76 model) and i am trying to convert it back to ac (VA summer/fall is brutal sometimes). I was looking in my factory service manual (86 dodge truck repair manual) and couldnt find any wiring diagram in it that matches what the current set up is for this ac/heater. The heater box appears to be just that with a separate ac evap unit. The manual only shows a heater box with the ac/heater as one box. The factory cut out in the fire wall for the ac hook up looks to be original so does the separate evap unit (there are no duct connections going into the separate heater box.
I cant figure out what that relay is behind the dash vents (nothing in the manual about it), along with the blue box and the white one attached to the dash itself (see pics) i know the one to the far right of the relay (i assume it is a relay) is the blower motor resistor.
Also in the one pic there are 3 wires coming from the ac blower motor that were just cut and not going anywhere along with that big pig tail you see dangling. Does anyone have a pic or diagram on how that is connected? Additionally i cant say i ever seen that ac/heater control unit in the pic and when i search for it nothing comes up?

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Author:  86d100 [ Sun Jun 20, 2021 5:44 pm ]
Post subject:  Re: AC/HEATER rehook up
(back of the ac/heater control)

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Author:  volaredon [ Mon Jun 21, 2021 5:29 am ]
Post subject:  Re: AC/HEATER rehook up
Looks just like what was on my 83.
"Dealer add on" unit.
Belt catalogs used to ask if you had factory air or dealer air, yours would be dealer air.
Author:  Charrlie_S [ Mon Jun 21, 2021 7:35 am ]
Post subject:  Re: AC/HEATER rehook up
Could allso be aftermarket add on air. I have done sevsral of those installs over the years.
I should still have some install instructions someware. give me a couple of days, and if you still need info, send me a pm
Author:  86d100 [ Mon Jun 21, 2021 5:05 pm ]
Post subject:  Re: AC/HEATER rehook up
Quote:
Looks just like what was on my 83.
"Dealer add on" unit.
Belt catalogs used to ask if you had factory air or dealer air, yours would be dealer air.
Ah that would make sense cause my factory manual didnt even have a wire diagram for it lol. My duster was a VA car originally too and it had "dealer" add on air conditioning.
Author:  86d100 [ Mon Jun 21, 2021 5:06 pm ]
Post subject:  Re: AC/HEATER rehook up
Quote:
Could allso be aftermarket add on air. I have done sevsral of those installs over the years.
I should still have some install instructions someware. give me a couple of days, and if you still need info, send me a pm
If you do that would be great
Author:  Charrlie_S [ Mon Jun 21, 2021 5:52 pm ]
Post subject:  Re: AC/HEATER rehook up
Quote:
Quote:
Could allso be aftermarket add on air. I have done sevsral of those installs over the years.
I should still have some install instructions someware. give me a couple of days, and if you still need info, send me a pm
If you do that would be great
See if you can find any tags or sitckers that might say "Wynns", "ARA" , "FRigette", any thing like that. They were three of sveral companies that made units for Mopar trucks.
PS: That green box is an electronic thermostat
Author:  86d100 [ Wed Jun 23, 2021 1:35 pm ]
Post subject:  Re: AC/HEATER rehook up
Quote:
Quote:
Quote:
Could allso be aftermarket add on air. I have done sevsral of those installs over the years.
I should still have some install instructions someware. give me a couple of days, and if you still need info, send me a pm
If you do that would be great
See if you can find any tags or sitckers that might say "Wynns", "ARA" , "FRigette", any thing like that. They were three of sveral companies that made units for Mopar trucks.
PS: That green box is an electronic thermostat
Oh wow i would have never guessed that box was a electronic thermostat. I did find this sticker on the evap unit itself

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Author:  Charrlie_S [ Wed Jun 23, 2021 2:32 pm ]
Post subject:  Re: AC/HEATER rehook up
Yep, that is an aftermarket A/C kit. I know of them, but don't think I have any literature for their units. I'll take a look. Actually most of them used very similar wiring.
On that blue box (just going by failing memory) two wires go to a thermister in the evaporator. two wires went to a variable resistor connected to the temp control (either on the control head, or the lever on the evap case). One wire for +12volt, one wire for ground, and one wire to the compressor clutch.
Author:  86d100 [ Fri Jun 25, 2021 2:02 pm ]
Post subject:  Re: AC/HEATER rehook up
Quote:
Yep, that is an aftermarket A/C kit. I know of them, but don't think I have any literature for their units. I'll take a look. Actually most of them used very similar wiring.
On that blue box (just going by failing memory) two wires go to a thermister in the evaporator. two wires went to a variable resistor connected to the temp control (either on the control head, or the lever on the evap case). One wire for +12volt, one wire for ground, and one wire to the compressor clutch.
Well I'll be dipped didnt even know they did that. I do see the 2 wires coming out from the evap core (no connector for it) and the resistor (looks like a relay) up on the fire wall. I'll have to play around with it. Thanks for the info
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