2nd Gen Non-Engine/Transmission gauge cluster test...codes??????

[WatsonJ]

I am in a "NO BUS" situation. Have removed the cluster and applied dielectric grease to the connectors. NO LUCK. Did the cluster self diagnostic and it gave me these codes 900, 920, 921, 940, 950, 999 no "e" or "p".

What are these? Not in my Haynes Manual and have not seen them here.

I cannot get the truck to give me any codes using the on, off, on off, on

method. Next step will be to disconnect/clean/dielectric on the ECM & PCM

modules and the plug by the firewall. I also did my starter jumper relay.

After that I give up and take it to the dealer.

 

[ToolManTimTaylor]

Grrrr If I remember the "900, 920, 921, 940, 950" are no signal from Tach (900) Oil pressure (920) ECM (921) Volts (940) Temp(950) or something to that effect. It sounds like a general cluster communication failure tho.



I can't remember where I saw them but I found them when I had Missed the bUs one day myself.