Why do the gauges still not work but now the gauge lights work after changing the instrument cluster

Do the light's on the instrument cluster work ? Fuse #24 - 20 amp location intergrated power module , under hood fuse box . Probably the instrument cluster it's self is bad , but without testing that would be a guess . Hooking up a factory or professional scan tool to view input's to the instrument cluster would be the proper way to diagnose. Gauge info to the Instrument come's over PCI serial data bus . A communication network for the control modules on the vehicle . Gauge info. come's from the PCM - powertrain control module. Your best bet , take it to a qualified repair shop ,dealer etc....

Check wirring for damage

Might be a loose or corroded connector. Remove the cluster and check the connectors. See procedure at link below. If conneectors look good but gauges contine with issue, replace the cluster.
Repair Guides Instruments And Switches Instrument Cluster AutoZone com

Hello it sounds like a ground or connection problem to you dash cluster. I would pull the front driver side dash board appart and unscrew the the instrument cluster check wiring for being loose or corroded at the plugin. if that checks out good no corrosion the instrument cluster itself might have a problem. I seen the instrument cluster go bad before that is probably it.

check for an instrument cluster fuse in the fuse panel if it's good you will have to pull the cluster out and change the lights behind the gauges

Here you go. Under hood fuse block
Ign. Fuse E
and
ipc/dic
both fuses are 10 amp
I hope this helps. Take care.

try checking your fuses under your dash panel to see if one of them is boken/blown

These vans are common for having cracked circuit boards in the Instrument cluster. You need to replace the circuit board. Try smacking the end of the dash and see if the gauges start working again.

Well if you checked all of the fuses, then most likely the wire harness that is plugged into you gauge cluster from inside the dash either came loose or your gauges cluster is faulty and blew out. I would check to see if that wire harness came loose and if it didnt then your probably going to have to replace that whole gauge cluster. Check around on ebay then are pretty cheap on there.

I had a problem with my instrument cluster on my 1999 dodge caravan went out. If you hit the top of your dash right above the cluster and it turns on or off then It is a cheep fix if you do it yourself. You take out the gauge cluster by removing screws from the door end of the dash. It is really simple. take out the gauge cluster and unplug it. Look at the plug end that is on the gauge cluster and look were it is soldered into the circuit board. If you look close you will see one or two pins where the solder joint or joints is/are cracked in a circle around the pin. Add some flux and apply heat with a stick type solder gun and it will be fixed. Now reassemble and you just saved 500 dollars minimum.