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How to wire a coleman mack themostat part no. AP7862

Wiring specifications

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Posted on Jan 02, 2017


SOURCE: need wiring diagram for transformer and themostat
There is a manual it has a diagram inside.

That's all the info i could find mentioned at all on the net, I did exhaustive searching....

Posted on May 15, 2010

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SOURCE: coleman mach3 wireing diagram diagram

Hi, Yes, but you need to know which wires do not need to be hooked up...

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Air Conditioner Trouble -Review the Possibilities


Posted on Jul 19, 2010

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How do I know which sides to hook up the four sets of wires that go to the manifold on my Pentair mastertemp 250. Are they interchangeable? One purple set one red set one orange set one brown set.

Absolutely not, they are not interchangeable! Each set of wires, go to a specific sensor or switch. The opposite end of that wire goes to an electronic circuit board with specific logic. It is in constant communication and or waiting for communication/confirmation, from that specific switch or sensor, so that a specific action can be taken for a specific situation, all based on that specific sensor or switch that it is connected to. So therefore do not rearrange the wires.
purple wires usually go onto a pressure switch. Red wires will normally go on to the automatic gas shut off switch, or AFS.
there are usually two sets of two wires for the high limits, and they are colored orange. Because there are two high limits.
Brown wire, I'm not sure of? I don't remember any brown wires on a master temp. Is it possible that the brown wire that you see, has discolored and it was an orange wire, or a set of orange wires previously?

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1 Answer

What are the electrical readings on the throttle positioning sensor

The throttle position sensor has both an idle contact switch and a basic 3 wire potentiometer that measures throttle angle opening. The idle switch and the throttle potentiometer share a ground wire.
To test the sensor first you have to verify that the wiring is intact by
1. Disconect the sensor and with a volt meter check the 4 wires. I have attached a wire diagram and picture of the pin layout to make it easy for you.
Pin 1 ( Yellow wire) is the PCM reference voltage. Specification is 5V
Pin 2 ( Red and Green wire) is the signal wire for the TPS. Specification is 5V
Pin 3 (Blue and white wire) is the idle switch. Specification 5V. Please note that this circuit is not actually used by this year Sedona so some vehicles are missing the wire.
Pin 4 (Black and yellow wire) is the ground. Specification: continuity to ground ( less than 1 ohm)
If the voltages are correct next you want to check the sensor.
1. Connect the throttle sensor connector.
2. Key on engine off
3.With a voltmeter measure terminal 2 of the sensor with the throttle closed, Specification is .2 to.4 volts.
4. With ta voltmeter monitor terminal 2 with the throttle fully open.The specification on terminal 2 is 4 to 4.4 V.
5. Slowly open and close the throttle while monitoring terminal 2 and make sure you have a smoot increase and decrease in voltage as the throttle is moved from close to open throttle and returned to idle.


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1 Answer

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Most era specific bikes will have the same wiring in and around coil/cdi etc. Most annual changes were lighting and such. In most cases, all wires exiting the crankcase go to specific same color male/female connections for the CDI and Regulator/Rectifier, with the extra wires being the coils. The earth wire will have either a screw down ring end or fit the only corresponding male or female connection. The other generally non black wire will have its corresponding connection. Hope these help, Cheers.

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1 Answer

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