help for HUD problems!!

[fatboyevo]

I have a 89 240sx with black sr20. I bought HUD digital cluster and harness to replace my jdm dashboard(work fine). it's easy to install with harness. after installed some work and some not:

donot work:
1. rev
2. no display speed on the hud and dashboard(supposed to show 0 if not move).
3. dashboard lights(bulbs are fine)
4. high water tmp(not high in my old dashboard)

I changed back to my old one everything work.
any ideas?? is it harness or dashboard. what is the problem??

[SochBAT]

i don't think you can use the digital HUD for SRs. Swap it back to analog, and if you've got a SOHC cluster, swap out the tach and throw on the DOHC tach.