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Old 10-21-2017, 10:25 AM   #1
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Where is my PCM 2003 Workhorse

I just bought a 2003 FR Georgetown on a Ford Chassis. My front (Chassis) AC will not work.

Mechanic shop says no power to the switch under dash but fuses good. I have the rig back and am looking for the PCM to check the wires. Any ideas where that may be?

By the way, the previous owner has many things bypassed under the hood and chassis. Fuse blocks, wires to the horn and wipers.
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Old 10-21-2017, 02:56 PM   #2
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If it is a F53 Ford chassis why do you say workhorse?
Do you know what brand the non factory AC system is?
Maybe you could post a photo of the AC dash controls.

If it is a 2003 F53 then the Powertrain Control Module (PCM) is located on the Steering Column, LH side.

Factory wiring:


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Old 10-22-2017, 06:52 AM   #3
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Good point. It's not a Workhorse. Call me a newbie to motorhomes. It is definitely Ford factory air.

I will locate the pcm and trace the conductivity of the wires to the switches.

Thanks again.
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Old 10-22-2017, 08:29 AM   #4
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Its tucked up just to the right of the emergency brake pedal...
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Old 10-22-2017, 08:39 AM   #5
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Quote:
Originally Posted by Oracertified View Post
It is definitely Ford factory air.
Not Ford factory air, will need photo of the AC dash controls to ID what brand.

The ones that had 100% Ford factory air was the E-series Econolines that were class "B" and class "C" RV's.

I am guessing you have a class "A" rv.

Example of one brand (EVANS) of AC.


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Old 10-22-2017, 10:31 AM   #6
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The plot thickens. I will post a pic . It is a class a. Since it is an Evans, I may have better luck finding docs.
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Old 10-26-2017, 05:55 PM   #7
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Thanks for all f the help. The power to the AC controls was because of a bad fuse panel under the steps. It's a work in process, but it is being fixed.
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