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The cluster is user friendly when troubleshooting. A common fault is that the legs on the crystal deteriorate. The screws hold the gauge to the panel. Just be careful when disassembling it all.
Thanks for that. I will take care. I have a background of a lifetime in the electronics industry. But I know how brittle some old gear can get unless you hasten slowly. :-)
Mudnut, it sounds as though you have had the cluster apart. Some of those screws look as if they are holding the panel there and some look as though they carry an electrical connection through to the PC boards inside and as you say to the gauges. From Mark89s picture earlier in this post can you tell me which are which or am I wrong in my assumption. Those in the triangular patterns definitely look to be electrical connections. I am just going by looking at it, I haven't disassembled anything yet. :-)
I've got a spare cluster on the shelf if your want me to have a look at anything, happy to pull it apart and get some pics if you like, I'm never ginna use it. . .
I've got a spare cluster on the shelf if your want me to have a look at anything, happy to pull it apart and get some pics if you like, I'm never ginna use it. . .
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Thanks for that mate but I have the one I got from the wreckers to play with. I will know soon enough how it goes together. (or not) :-)
Hey craig, yeah its all yours it's just sitting on the shelf doing nothing was going to do a clean out sometime. PM me your address and I'll send it. . .
Job done. Thanks to posts by mudnut and others. Checking that the issue was in fact the speedo and not the sensor or sensor wiring, I figured that the speedo and odometer both use the same pulse train from the sensor. Given that, I zeroed the tripmeters on both the cluster and on my gps and waited until I had clocked 1200 km. The difference was within 2km. Pretty good and proved to me that the sensor data was getting to the speedo ok. I bought a cluster from the wreckers and removed the speedo. This is only held in by four screws. Those four screws also carry power and the pulse train from the printed loom to the speedo pc board. Also disconnect the plug wiring to the odometer. The speedo then simply comes out. Removing the cluster from the truck and swapping the speedo mechanisms over and putting cluster back in the truck. Road test and check against the gps. Just about perfect. Job done. Thanks guys. IMG_20170812_202159.jpgIMG_20170813_083713.jpg
Last edited by davidbutton; 13th August 2017 at 03:00 PM.
Reason: getting the pics the right way around. Doh!
Well done and thanks for the feedback and pictures. If you still have any more problems, check that the power wiring and earth points are all in good condition. Have a real good look at the circuit board on the old speedo. You may find the fault and be able to repair it. If you find that you need to adjust the speed, there is a small potentiometer that is accessible by drilling a small hole in the top of the cluster, so it can be adjusted while still in the dash.
Originally Posted by Rossco
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