p0577 code, does my diagnostic track?
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Road Master
Joined: May 2008
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From: Channahon, IL.
p0577 code, does my diagnostic track?
Just got back from a week long trip in Eureka Springs. During the trip had the CEL come on. Pulled the code and it was p0577, Cruise Control Input High. The CEL is not present at start up. It returns sporadically. Sometimes after a couple miles, sometimes after 20 or 30. During the longer hauls home it would even come and go at times. I've opened everything up and inspected it. No frayed or rubbed wires or other obvious areas that would cause an issue. I've performed the drop switch test and all switches check out with the exception of the Resume side will occasionally hesitate before returning from green. Finally got as far as checking for continuity at the ECM end of the main housing and here's what I've got. The Set side of the switch shows an open line until I activate that side then shows continuity with a resistance of .1 kohm. The Resume side shows a wildly varying resistance of 50 up to 99 kohm with the switch in the neutral/center position. Then when activated drops to a consistent resistance of also .1 kohm like the Set side. Before I pay for the non returnable electrical part and go through the work of changing it out is there anyone who can confirm that these numbers and conditions point to that switch? Also, as I've read has happened to others with this code in other threads, I do not have any fuses blowing. Any input is greatly appreciated! I just don't know what the resistances are supposed to be but I figure that at the very least both sides of the momentary switch would be the same or at least closer than my two sides currently are. Thanks again!
Last edited by Little Mike; May 20, 2019 at 06:46 PM.
Novice
Joined: Feb 2022
Posts: 20
Likes: 2
From: Connecticut
Just got back from a week long trip in Eureka Springs. During the trip had the CEL come on. Pulled the code and it was p0577, Cruise Control Input High. The CEL is not present at start up. It returns sporadically. Sometimes after a couple miles, sometimes after 20 or 30. During the longer hauls home it would even come and go at times. I've opened everything up and inspected it. No frayed or rubbed wires or other obvious areas that would cause an issue. I've performed the drop switch test and all switches check out with the exception of the Resume side will occasionally hesitate before returning from green. Finally got as far as checking for continuity at the ECM end of the main housing and here's what I've got. The Set side of the switch shows an open line until I activate that side then shows continuity with a resistance of .1 kohm. The Resume side shows a wildly varying resistance of 50 up to 99 kohm with the switch in the neutral/center position. Then when activated drops to a consistent resistance of also .1 kohm like the Set side. Before I pay for the non returnable electrical part and go through the work of changing it out is there anyone who can confirm that these numbers and conditions point to that switch? Also, as I've read has happened to others with this code in other threads, I do not have any fuses blowing. Any input is greatly appreciated! I just don't know what the resistances are supposed to be but I figure that at the very least both sides of the momentary switch would be the same or at least closer than my two sides currently are. Thanks again!
Seasoned HDF Member
Joined: May 2008
Posts: 21,146
Likes: 12,713
From: South Carolina
It`s best not to tag onto a long winded blurb by a one and done poster.
Start your own thread, give model and year, and exactly what the issue is, not a book, just the facts.
Start your own thread, give model and year, and exactly what the issue is, not a book, just the facts.
Last edited by Dan89FLSTC; Jul 29, 2024 at 03:58 PM.
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