Mine did the same thing and it was the alternator going bad.
Your cluster is bad. Happened to mine.
It is possible there is a short circuit on your brake light circuit which is pulling the voltage down causing the gauges to go haywire.
The car wants you to take it to a certified mechanic, for a change.
You battery could be dead or low on power if the van will not start and the gauges are going crazy.
this is common, i have had a few.. its normal for all the gauges to max out then return to normal but to go " crazy " ck battery ground. then if persists pull out control head and ck grds. there. still? send head to spedo. repair shop
check battery and alternator
If you mean your gauges are going crazy, this is likely the result of a loose or bad ground wire. It could be the ground wire for your battery or any ground wire that is tied into the gauges.
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Sensor on back of your transmission sending a poor signal to the computer.Replace sensor will fix problem.