93 silverado stepside - no heating/cooling/fan

michaelmcneil wrote:


>
> On Mon, 08 Oct 2007 05:09:47 GMT, mikemcneil RemoveThis @eastlink.ca (michaelmcneil) wrote:
>
>
>>The other day the heating.cooling electronic cluster stopped displaying anything
>>in relation to the heating or cooling settings.
>>
>>I cannot adjust the fan speed or the temperature as there is nothing there on
>>the display to adjust.
>>
>>I checked all the fuses that I could find in the cab and under the hood and
>>found nothing wrong.
>>
>>any ideas?
>
> anyone?

Start chasing the schematic.
 >> Stay informed about: 93 silverado stepside - no heating/cooling/fan 

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 >> Stay informed about: 93 silverado stepside - no heating/cooling/fan 

On Fri, 12 Oct 2007 13:55:55 -0400, Meat Plow wrote:

>On Fri, 12 Oct 2007 16:26:57 +0000, michaelmcneil wrote:
>
>> anyone?
>>
>> On Mon, 08 Oct 2007 05:09:47 GMT, mikemcneil.TakeThisOut@eastlink.ca (michaelmcneil) wrote:
>>
>>>The other day the heating.cooling electronic cluster stopped displaying anything
>>>in relation to the heating or cooling settings.
>>>
>>>I cannot adjust the fan speed or the temperature as there is nothing there on
>>>the display to adjust.
>>>
>>>I checked all the fuses that I could find in the cab and under the hood and
>>>found nothing wrong.
>>>
>>>any ideas?
>
>Pull the cluster and look for a loose plug/connection etc..

Somehow the system came back up and is working properly as of this morning. I
pulled the cluster anyways to see if anything was actually loose and everything
is snug.

So if it's back there is obviously an electrical issue that is the problem but
I'll have to wait until the problem happens again before I can do anything. Any
testing now using schematics and continuity tests are gonna be useless as long
as everything works.
 >> Stay informed about: 93 silverado stepside - no heating/cooling/fan 

Hi!

> So if it's back there is obviously an electrical issue that is the problem
> but I'll have to wait until the problem happens again before I can do
> anything.

Not necessarily. (Unless you're worried about breaking it again.) I would
think there is a good chance that you're dealing with some bad solder or
connections somewhere. While continuity checks might not be helpful, giving
the controller board a good once over under bright light and with a
magnifying glass may reveal something.

Note that you do have to really be looking. It won't hurt to try and
"wiggle" components on the circuit board to see if their soldered-in leads
flex or reveal a cracked joint. I don't know if you've looked for bad solder
joints before, but they can be a bear to find.

Other things that might be helpful include tapping, shaking and gently
twisting the controller board to see if it blanks out, resets itself or
stops working properly as you do. When you find something that makes a
difference, "zoom in" and test specific areas of the board. Temperature
differences could reveal faulty components as well. It recently turned cold
here--what is the weather like in your area and has it changed recently?

William
 >> Stay informed about: 93 silverado stepside - no heating/cooling/fan 

On Sat, 13 Oct 2007 20:01:40 GMT, "William R. Walsh"
wrote:

>Hi!
>
>> So if it's back there is obviously an electrical issue that is the problem
>> but I'll have to wait until the problem happens again before I can do
>> anything.
>
>Not necessarily. (Unless you're worried about breaking it again.) I would
>think there is a good chance that you're dealing with some bad solder or
>connections somewhere. While continuity checks might not be helpful, giving
>the controller board a good once over under bright light and with a
>magnifying glass may reveal something.
>
>Note that you do have to really be looking. It won't hurt to try and
>"wiggle" components on the circuit board to see if their soldered-in leads
>flex or reveal a cracked joint. I don't know if you've looked for bad solder
>joints before, but they can be a bear to find.
>
>Other things that might be helpful include tapping, shaking and gently
>twisting the controller board to see if it blanks out, resets itself or
>stops working properly as you do. When you find something that makes a
>difference, "zoom in" and test specific areas of the board. Temperature
>differences could reveal faulty components as well. It recently turned cold
>here--what is the weather like in your area and has it changed recently?
>
>William
>

the weather did start getting colder in the past couple of weeks... dropping to
between 5 and 10 degrees celsius most nights. But on some of those colder
nights the heat has worked.

I had the cluster out as far as I could take it out without actually unhooking
it and played with the power connection. Nothing flickered when I did that. Is
the housing itself able to come completely apart? It looked like a completely
enclosed plastic housing.
 >> Stay informed about: 93 silverado stepside - no heating/cooling/fan