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Old 08-12-2018, 06:27 PM   #1
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Journey dash air troubleshooting

The system (SCS) is charged and if I jump from the alternator the compressor clutch kicks in and cold air happens. The 12v line that is supposed to activate the clutch has 12v, but not enough amperage to work the clutch. I think. Also, the rear fans have not kicked in. I have found two relays (pressure switches?) on the high pressure side, but nothing on the low pressure side. What am I missing?
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Old 08-12-2018, 06:44 PM   #2
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many times on A/C units one of the pressure switches is a loss of charge switch. This is a low pressure switch in the liquid line that won't let compressor come on if there is no refrigerant in system. You need a gage set to check refrigerant pressure in system.
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Old 08-13-2018, 06:23 AM   #3
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Journey dash air troubleshooting

Good point. We had pulled a vacuum and refilled the system to spec. We have 12v, enough to show on a multimeter, but not enough to activate the clutch. I remain perplexed.
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Old 08-13-2018, 07:08 AM   #4
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Last year I 'reset codes' with my ScanII and for whatever reason, the dash air started working again
This year it wouldn't work again unless I wiggled the 10 amp fuse under the hood labeled 'Alt/Start'. Upon close inspection (with a magnifying glass) I determined that the 'socket' on that fuse was so loose that the fuse wasn't making contact. I built up one of the blades on the fuse with solder and now it seems to work fine.
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Old 08-13-2018, 06:52 PM   #5
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Thumbs down Journey dash air troubleshooting

These are strange machines. I think putting new bulbs in the backup lights might get the dash air working. Don't know if I have an ALT/START but its a thing to try.
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Old 08-13-2018, 08:44 PM   #6
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Originally Posted by blevtr View Post
These are strange machines. I think putting new bulbs in the backup lights might get the dash air working. Don't know if I have an ALT/START but its a thing to try.
Yea, I'd start with the backup lights too. Then maybe clean the dipstick heaters on the left side !!
(Big Grin)

Oh yes, I almost forgot. I looked at the wiring diagram where the ALT/START fuse is located and that fuse also provides power to the ABS system relay. AND the ABS self test was successful for the first time in a long time. I'm taking the coach for a short ride to a nearby campground for my wife and granddaughter. We'll see if these two thingies work again tomorrow.
Stan
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