First thing disconnect both batteries for 10-15 minutes, resets modules ie network TIPM, take time to double check good cables/connections, good 12.6 +volts from batteries checked separately, load or hydrometer tester on them, check grounds low voltage/dirty power case all kinds of gremlins.
Check wires /fuses/grounds in and to TIPM including connectors underneath it, check large wire connectors by firewall in engine bay they feed are feeds to cluster .
If possible check for codes help narrow down issue,
For 2006 ECM/TCM ,cluster(EMIC body module) and network fusebox TIPM, really need DRBIII or equivalent scanner to check for codes.
Try Key on/off 3 times in 5 secs could show some ecm/tcm codes.
press trip button, turn key to on, should launch self test of clusters gauges lights.
If cluster, AFAIK
no new clusters available best to find local cluster repair shop have yours fixed since has proper security mileage /hour info and checksums.