Dash AC for 1996 Coachmen 340FL
Moved up to a Class A from our Class C and have been very happy and very much easier to work on...
Its a 1996 Coachmen 340FL - the build is a 1995 F53 Ford.
the issue is the dash AC. I know from the initial look in to the rig is that it is probably a Evans AC system with the standard Ford supplied parts from the chassis build. I can see the dash control is the "Chrysler" dash control.
What I got and have initially figured out is this:
Heat works fine, all vacuum doors actuate and no vac leaks seen, blower works on all speeds.
No cooling though, the blue Dash switch though when pushed does go blue but it appears to just be a blue insert you see not a actual indicator light so at first I was not sure if the switch was a issue. The Compressor does free turn but I do not hear the Clutch - checked for Freon pressure and it has pressure and pretty sure enough to initially allow the compressor to run (cant remember read but was like 100+, checked for power at the High switch and low cycling switch and no power, took dash control off and power at Red wire with RUN power across fan leads, as well to the blue wire which I believe is the switch output when depressed so I am almost sure the dash control is fine.
I would check the obvious as fuses and relays BUT I don't have a reliable fuse layout for inside or a layout for the Power Distribution Box outside. Everything I find online is for trucks and though should be about the same I don't have things in the same layout to be sure. I also believe there is no clutch relay only a blower relay out in the front. Every fuse I have I have checked and is good. I had the dash apart to reroute some poorly installed jack wiring and looked in there for any inline fuses and seen none - nor any on the dash control like some has. Went to Ford about getting a fuse and pdb layout for the application and they just looked like deer in the headlights.
I also have power at one of the 2 leads on the thermostat at the air box located outside, not sure if that is in the circuit or would kill power?
I have not yet jumped 12v o the clutch to see if it clicks or works. I need power there 1st anyway.
I also checked the wire immeadiately after the fuses to see if it was a bad block connection at all fuses.
So my question is?
1. Is there a AC relay?
2. Could the fan relay have a leg to jump power to AC and still blow?
2. What fuses would / might exist and where?
3. What flow of power happens in this circuit? Since I have no power to the limits what is just prior to them to look for power.
4. I assume I should have a power read at the limits correct?
Much appreciation in any help be fore I go ripping into wire looms...
Its a 1996 Coachmen 340FL - the build is a 1995 F53 Ford.
the issue is the dash AC. I know from the initial look in to the rig is that it is probably a Evans AC system with the standard Ford supplied parts from the chassis build. I can see the dash control is the "Chrysler" dash control.
What I got and have initially figured out is this:
Heat works fine, all vacuum doors actuate and no vac leaks seen, blower works on all speeds.
No cooling though, the blue Dash switch though when pushed does go blue but it appears to just be a blue insert you see not a actual indicator light so at first I was not sure if the switch was a issue. The Compressor does free turn but I do not hear the Clutch - checked for Freon pressure and it has pressure and pretty sure enough to initially allow the compressor to run (cant remember read but was like 100+, checked for power at the High switch and low cycling switch and no power, took dash control off and power at Red wire with RUN power across fan leads, as well to the blue wire which I believe is the switch output when depressed so I am almost sure the dash control is fine.
I would check the obvious as fuses and relays BUT I don't have a reliable fuse layout for inside or a layout for the Power Distribution Box outside. Everything I find online is for trucks and though should be about the same I don't have things in the same layout to be sure. I also believe there is no clutch relay only a blower relay out in the front. Every fuse I have I have checked and is good. I had the dash apart to reroute some poorly installed jack wiring and looked in there for any inline fuses and seen none - nor any on the dash control like some has. Went to Ford about getting a fuse and pdb layout for the application and they just looked like deer in the headlights.
I also have power at one of the 2 leads on the thermostat at the air box located outside, not sure if that is in the circuit or would kill power?
I have not yet jumped 12v o the clutch to see if it clicks or works. I need power there 1st anyway.
I also checked the wire immeadiately after the fuses to see if it was a bad block connection at all fuses.
So my question is?
1. Is there a AC relay?
2. Could the fan relay have a leg to jump power to AC and still blow?
2. What fuses would / might exist and where?
3. What flow of power happens in this circuit? Since I have no power to the limits what is just prior to them to look for power.
4. I assume I should have a power read at the limits correct?
Much appreciation in any help be fore I go ripping into wire looms...
