How To Repair 3800 International Instrument Cluster
If yous take owned an mid-90's to 2005 International schoolhouse bus than most likely you have watched your instrument cluster work one infinitesimal and then go completely blank the next minute. Some days it volition seem to work simply fine and other days it will not work at all.
If you have ever priced out a new instrument cluster than yous probably had to be picked upwardly off the floor after hearing the price. The whole cluster tin exist $600 or more and just the printed circuit board is over $400. For near of us I would imagine that this is only non an acceptable price to pay. Here is a fix that I have learned after researching this well known problem.
I would say that 80 to ninety per centum of the time doing the post-obit volition get your instrument cluster back up and running for under $10 and about 30 to 45 minutes of your fourth dimension. Occasionally, there will be the few that are but across repair, but if you instrument cluster seems to part correctly when it is working than this gear up should work.
The problem seems to be the connector on the back side of the musical instrument cluster. Information technology doesn't typically look loose or broken, just where the pins of the connector solder into the circuit lath at that place is a bad connectedness somewhere. If you heat each pin upwardly and put some fresh solder effectually the pin there is a good chance you volition have just saved yourself $600. Even if yous had to get out a purchase a soldering iron and some solder you won't be out very much at all.
Remove the ii lower screws from the bottom of the instrument cluster and pull the instrument cluster loose from the nuance.
Disconnect the three wire plugs from the back of the instrument cluster and if you take air brakes or air ride you will need to disconnect the air lines from the air gauges. This will be a tight fit to get your hands in at that place but it can exist washed. Brand sure to mark the wires and air hoses so yous know exactly where they came from. The wires should only plug back into one spot only the air lines can be mixed upwards very easy.
In one case information technology is removed from the bus prepare information technology on your workbench or table confront. On the tiptop you will run across 3 screws. Remove these screws and then remove the black plastic embrace from the front end. The bottom of the cover is held in place by 2 pieces of Velcro. See photo below.
Now that the front bezel is off, you lot volition need to remove the following gauges: Oil Pressure, Temperature, RPM, MPH, Fuel, and Volt gauges. If you look on the back side of the instrument cluster opposite of the front of the gauges yous volition meet a half inch size hole right in the eye of the circuit board. Utilize a pocket-size round object and push button the judge out and through the peak of the instrument cluster. Sometimes the black gauge covers that have the numbers on them will come loose and will need tacked dorsum down in place with a dab of super glue. Information technology doesn't take much to keep it in identify. Do not remove the needles from the pace motors. Doing then will cause the needles to be in the incorrect spots. Set the gauges aside in a condom spot being careful not to jar them around. Remember where each guess goes and then yous don't get them mixed up when reinstalling them. Sometimes it can be helpful to have a picture with your telephone so you make certain you render them to their rightful spot.
Once all the gauges are removed flip the musical instrument cluster so that it is confront down and remove the metal cover on the back. You should have to remove six screws. Once you have the screws removed you should exist able to lift the metal comprehend off the circuit board. There should now be two remaining screws in both top corners of the center circuit board that volition need removed. You volition as well have to unplug ii wires. One is for the hours meter and the other is for the odometer. Feed the two wires through the circuit board and remove the circuit board from the rest of the musical instrument cluster.
At present that the circuit board is removed information technology is time to re-solder the connections for the main plug. The pins that you want to re-solder will be the ones opposite of the pins in the green plug on the back side of the circuit board. It doesn't take much to re-solder them. Heat them up with a soldering iron and and so once hot add a tiny bit of new solder and then move on to the next one. If yous look in the picture below I have used a sharpie to brand a dotted line around the pins that you should re-solder.
In one case you have re-soldered everything put information technology all back together in the opposite order of taking it apart and and then re-install it back into the bus. Hopefully this will take care of your Intermittent International Instrument Cluster.
Source: https://www.churchbusbasics.com/forums/international-navistar-bus-helps/1995-to-2005-international-instrument-cluster-repair/
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