DH166 Posted January 16, 2020 Share Posted January 16, 2020 On the 81 Custom project. I seem to have two blower motors. The easily identifiable Motorcraft one mounted through the firewall, which is wired up and spinning under power applied. There's also this one (pictured) that is mounted inside the cab under the the passenger side dash. When I unscrewed the mounting screws, it dropped right out, as the wires were torn/chewed through. I can't figure out the wiring for this. The wiring diagrams under Electrical in Documentation were for 85 and 86, and the diagrams in the EVTM for 81 didn't show this. I read on one of the articles that A/C was sometimes dealer-installed, and my control switch on the dash indicates A/C. Any help on where this wires up? Link to comment Share on other sites More sharing options...
FuzzFace2 Posted January 16, 2020 Share Posted January 16, 2020 I would have to guess that your truck has dealer installed AC as factory AC truck AFAIK only had 1 blower motor and it was in the engine bay on the HVAC box. Dave ---- Link to comment Share on other sites More sharing options...
Gary Lewis Posted January 16, 2020 Share Posted January 16, 2020 I would have to guess that your truck has dealer installed AC as factory AC truck AFAIK only had 1 blower motor and it was in the engine bay on the HVAC box. Dave ---- I agree. I've not seen anything in the documentation that would fit that blower's description. Link to comment Share on other sites More sharing options...
82F150I6 Posted January 17, 2020 Share Posted January 17, 2020 I've no wisdom to offer on the wiring but may be able to provide some useful information. My '82 has dealer air installed. The blower motor is located in the cab, behind the glove box and (from what I remember) looks similar to the one in your pic. A long (long) time ago the squirrel cage fan broke at the shaft and needed replacement. This is when I learned the AC in my truck was actually a system from ARA Manufacturing. I was lucky that ARA had a distro center located on the west side of Phoenix, not too far from where I lived at the time. I was able to purchase a fan from them. From what I recall, ARA used a different dash heat/air control switch panel than stock Ford. That might give you a hint if you have one of their systems. Also, the ARA system has an electronic module used to engage the compressor clutch. it is located in the dash on the passenger side, just under the dash cap, above the glove box. the module will either be blue or black (don't know what the difference is) and there is a transistor in there that blows out once in a while (don't ask how I know this). ARA was purchased a while back but they still exist (www.aramanufacturing.com). I've written them an email to see if I can learn anything about my system but I'm not holding my breath. Their website lists Hotmail and Gmail accounts for customer contact. Hope this helps. Link to comment Share on other sites More sharing options...
Gary Lewis Posted January 17, 2020 Share Posted January 17, 2020 I've no wisdom to offer on the wiring but may be able to provide some useful information. My '82 has dealer air installed. The blower motor is located in the cab, behind the glove box and (from what I remember) looks similar to the one in your pic. A long (long) time ago the squirrel cage fan broke at the shaft and needed replacement. This is when I learned the AC in my truck was actually a system from ARA Manufacturing. I was lucky that ARA had a distro center located on the west side of Phoenix, not too far from where I lived at the time. I was able to purchase a fan from them. From what I recall, ARA used a different dash heat/air control switch panel than stock Ford. That might give you a hint if you have one of their systems. Also, the ARA system has an electronic module used to engage the compressor clutch. it is located in the dash on the passenger side, just under the dash cap, above the glove box. the module will either be blue or black (don't know what the difference is) and there is a transistor in there that blows out once in a while (don't ask how I know this). ARA was purchased a while back but they still exist (www.aramanufacturing.com). I've written them an email to see if I can learn anything about my system but I'm not holding my breath. Their website lists Hotmail and Gmail accounts for customer contact. Hope this helps. Good info! Link to comment Share on other sites More sharing options...
82F150I6 Posted January 18, 2020 Share Posted January 18, 2020 I emailed this morning and was surprised to receive a prompt reply from Mark Foley at ARA. Mark was able provide a wiring diagram but wasn't able to find a parts list, install manual, etc. He did, however, offer to help me track down whatever parts I might need. the wiring diagram shows AC and Heater blower motors, so you may indeed have an ARA system. Wiring diagram is here: ARA_Air_Con-0507783.pdf Contact information from the email: ARA AUTOMOTIVE SYSTEMS INC. P.O.BOX 602, FRISCO, TX 75034 CELL: 214-693-6192 EMAIL: autoac@hotmail.com / aramfgco@hotmail.com WEB: aramanufacturing.com / arasourcing.com ARA CENTRAL SHIPMENTS PH: 214-697-1464Â ARA SOUTH SHIPMENTS PH: 214-693-6192 Have fun with it. Link to comment Share on other sites More sharing options...
Gary Lewis Posted January 18, 2020 Share Posted January 18, 2020 I emailed this morning and was surprised to receive a prompt reply from Mark Foley at ARA. Mark was able provide a wiring diagram but wasn't able to find a parts list, install manual, etc. He did, however, offer to help me track down whatever parts I might need. the wiring diagram shows AC and Heater blower motors, so you may indeed have an ARA system. Wiring diagram is here: ARA_Air_Con-0507783.pdf Contact information from the email: ARA AUTOMOTIVE SYSTEMS INC. P.O.BOX 602, FRISCO, TX 75034 CELL: 214-693-6192 EMAIL: autoac@hotmail.com / aramfgco@hotmail.com WEB: aramanufacturing.com / arasourcing.com ARA CENTRAL SHIPMENTS PH: 214-697-1464Â ARA SOUTH SHIPMENTS PH: 214-693-6192 Have fun with it. Walt - That's wonderful. Good job! Link to comment Share on other sites More sharing options...
taskswap Posted December 2, 2021 Share Posted December 2, 2021 Walt - That's wonderful. Good job! I know I'm resurrecting an old thread but I have this same system and control module. In my case, I was stripping the dashboard from my interior so I could renovate the floor and firewall insulation, and when I tried to disconnect the plugs from this module, the jacks pulled right off the board. I'm pretty sure I can re-solder them - the board is very basic. But since they're irreplaceable now and I had to open it anyway, I figured I'd snap a few pics in case anybody else has an issue with one of these. I didn't make a full schematic, but it should be possible to reconstruct the circuit from what's below. Part List: R1 - 18k 5% R2 - 47k 5% R3 - 5.6k 5% R4 - 390k 5% R5 - 2.2k 5% R6 - 1k 5% R7 - 18k 5% R8 - 18k 5% C1 (yellow) - 100n M63 C1 (electrolytic, also labeled C1) 10u 16V VR1 - HDK trimpot, unlabeled, I can't get an accurate reading without desoldering it TR1 - 2N2222 TR2 - 2N2222 TR3 - NP2907 D1 - 1N4001 D2 - 1N4001 D3 - not readable, hopefully it being green helps a little K1 - 111NC D012-W, looks like a standard 12VDC SPDT. If my Google search is right, looks like a 6A. From the PDF posted above, we know conn1 goes to gnd/blower switch/compressor clutch, conn2 goes to a thermistor which is installed in the air vent, and conn3 goes to a slidepot labeled "cold/off". It looks to me like they made up their own heater-control-unit bezel because mine doesn't appear to match any of the Shop Manual diagrams: I have more pics in an archive if anybody needs more information about tracing out their own system. Link to comment Share on other sites More sharing options...
Gary Lewis Posted December 2, 2021 Share Posted December 2, 2021 I know I'm resurrecting an old thread but I have this same system and control module. In my case, I was stripping the dashboard from my interior so I could renovate the floor and firewall insulation, and when I tried to disconnect the plugs from this module, the jacks pulled right off the board. I'm pretty sure I can re-solder them - the board is very basic. But since they're irreplaceable now and I had to open it anyway, I figured I'd snap a few pics in case anybody else has an issue with one of these. I didn't make a full schematic, but it should be possible to reconstruct the circuit from what's below. Part List: R1 - 18k 5% R2 - 47k 5% R3 - 5.6k 5% R4 - 390k 5% R5 - 2.2k 5% R6 - 1k 5% R7 - 18k 5% R8 - 18k 5% C1 (yellow) - 100n M63 C1 (electrolytic, also labeled C1) 10u 16V VR1 - HDK trimpot, unlabeled, I can't get an accurate reading without desoldering it TR1 - 2N2222 TR2 - 2N2222 TR3 - NP2907 D1 - 1N4001 D2 - 1N4001 D3 - not readable, hopefully it being green helps a little K1 - 111NC D012-W, looks like a standard 12VDC SPDT. If my Google search is right, looks like a 6A. From the PDF posted above, we know conn1 goes to gnd/blower switch/compressor clutch, conn2 goes to a thermistor which is installed in the air vent, and conn3 goes to a slidepot labeled "cold/off". It looks to me like they made up their own heater-control-unit bezel because mine doesn't appear to match any of the Shop Manual diagrams: I have more pics in an archive if anybody needs more information about tracing out their own system. Well done! That may be a huge help for someone in the future! Link to comment Share on other sites More sharing options...
mat in tn Posted December 3, 2021 Share Posted December 3, 2021 Well done! That may be a huge help for someone in the future! i love learning something new. the f100 (yet to be named) that i bought last month to restore is an absolute base model. barring one exception, it has dealer air! it has characteristics which i have never seen before. i have started a thread to journal how this project goes so when i get into it i will focus on the ac and add as many specs as i discover Link to comment Share on other sites More sharing options...
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