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Could be different problems. The cluster issue could be a problem in the printed circuit board inside the cluster. The cooling fan problem could be low coolant, a blown fuse, a faulty temp sensor, fan motor, or relay.
It would help to know specifically what van.
But in general, there would also need to be some kind of temp sensors. If what ever van you have just uses the ECM to turn the fans on and off then it may be a bad computer temp sensor.
The ECM also needs to send a ground signal to the relay when it gets the right temp readings. You can also check for power at the relays.
There could also be a temp sender elsewhere like in the radiator or cylinder head that will supply a ground when the heat is up.
You can get free diagrams from AutoZone.com in the repair section. These should show you everything in the circuit and give an idea of what to check.
You will just need to register, which is also free, and enter the specific vehicle.
Almost sounds like the same symptons as my van. Turns out the guage was not the problem. The van was in fact running hot because the electric radiator fans were not kicking in when the engine was hot. I replaced the relay switches for the fans. There are two of these in the fuse panel under the hood. There has been no problem with overheating since
Almost sounds like the same symptons as my van. Turns out the guage was not the problem. The van was in fact running hot because the electric radiator fans were not kicking in when the engine was hot. I replaced the relay switches for the fans. There are two of these in the fuse panel under the hood. There has been no problem with overheating since
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