'97 K1500 Suburban Cruise Control Issue

Orpedcrow

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My truck had intermittent cruise for a few weeks after I bought it then quit altogether. Over the years for other reasons I have replaced the multifunction switch and brake light switch with no change in cruise operation. Along my journey I stumbled upon a very detailed article illustrating every function (and how to check them) of each wire in the CC plug. Because I’m lazy I never went further than reading the article but I do remember it being useful :rotflmao:

Recently I pulled apart my CC module and saw perfectly flawless solder joints in it as well so I’m back to searching for said article and diagnosing from there.

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Orpedcrow

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I remember watching this guys videos too. He’s got all the procedures laid out.
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1998_K1500_Sub

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The most suspicious connections in the module are those made with this connector.

It seems, maybe 99 times out of 100, electrical problems are due to mechanical contacts.

In older parts, old electrolytic capacitors will act up.

Dendrite formation, broken solder joints and corrosion I'll all label as "mechanical".

This isn't news to anyone.

Insert your favorite failure mode here:____________________

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Orpedcrow

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The most suspicious connections in the module are those made with this connector.
I was suspicious of those as well. As you can see from this zoomed in shot, the far left most tab had a slight bend, (which I could’ve caused when removing the cover.) and repaired, all the connectors had witness marks on them. Everything inside the case was minty factory fresh looking.

I though about running the heat gun over the board but noticed both sides were coated in a clear epoxy?
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someotherguy

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Can't see without further disassembly, the solder joints for the harness connector to the board. That's the #1 failure in the wiper motor; as such it would be high on my list of suspects for the cruise module as well. Not proven, just a hunch.

Richard
 

Caman96

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I was suspicious of those as well. As you can see from this zoomed in shot, the far left most tab had a slight bend, (which I could’ve caused when removing the cover.) and repaired, all the connectors had witness marks on them. Everything inside the case was minty factory fresh looking.

I though about running the heat gun over the board but noticed both sides were coated in a clear epoxy?
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I’d send in Tron.
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Orpedcrow

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Can't see without further disassembly, the solder joints for the harness connector to the board. That's the #1 failure in the wiper motor; as such it would be high on my list of suspects for the cruise module as well. Not proven, just a hunch.

Richard
Yea I pulled the board out and looked at the opposite side. Same thing minty fresh
I’d send in Tron.
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as long as he can get back out without corrupting the system
 
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