93 K1500 Speedo/odometer intermittently function

[Muddy]

Look at the diagnostic (ALDL) connector under your dash. Lay down on the floor mat and look behind the dashboard at the metal tab it's connected to. Behind the connector you'll see that single black ground wire attached to the same metal tab with a screw.

Richard

Found it remove screw, cleaned everything up and put a new screw in and nothing no changes

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There’s a video of what it’s doing

 

[jus10inbrla]

Check power on circuit 824 sounds like its losing it if the odometer is off / on

 

[Muddy]

Check power on circuit 824 sounds like its losing it if the odometer is off / on

Sorry I haven’t responded before I can’t find a circuit 824 in the manual

 

[jus10inbrla]

824 is the VSS. It is pin (S) on the cluster pinout iirc

 

[Muddy]

824 is the VSS. It is pin (S) on the cluster pinout iirc

ok
ill have to check when it stops raining

 

[Road Trip]

Sorry I haven’t responded before I can’t find a circuit 824 in the manual

I just scanned the '93 Electrical Service Manual, and came up with 3
instances of '824'.

* In the first attached is a detail where the signal originates at the VSS.

* In the second attached is where it arrives at the instrument cluster.

This should hopefully get you in the ballpark.

Let us know what you discover.

 

[jus10inbrla]

I just scanned the '93 Electrical Service Manual, and came up with 3
instances of '824'.

* In the first attached is a detail where the signal originates at the VSS.

* In the second attached is where it arrives at the instrument cluster.

This should hopefully get you in the ballpark.

Let us know what you discover.

If im not mistaken it is what the odometer gear / motor recognizes in order to make the cluster work. Should be a ground, 39 ignition, & 824 go to it. Almost sounds like problem is in that connection. Or that drive motor mite be going out. I know he said the odometer stops turning . Idk if speedo is turning during that time tho

 

[alaraine]

My 93 with a 5spd did the exact same thing for about a year and then nothing not even a twitch for the last two years. But, mainly I wanted to say thanks to everyone who's posted on this thread because now I have two new leads for possible fail points.

 

[Muddy]

My 93 with a 5spd did the exact same thing for about a year and then nothing not even a twitch for the last two years. But, mainly I wanted to say thanks to everyone who's posted on this thread because now I have two new leads for possible fail points.

If you find anything please feel free to share

 

[Muddy]

both go and stop at about the same time as far as i can tell. i do have cruise control and it also stops functioning with everything else

If im not mistaken it is what the odometer gear / motor recognizes in order to make the cluster work. Should be a ground, 39 ignition, & 824 go to it. Almost sounds like problem is in that connection. Or that drive motor mite be going out. I know he said the odometer stops turning . Idk if speedo is turning during that time