2003 1800 elec problems

[musketballs]

Runs fine but: gas and temp gauge pegged, tach and speedo read 0, trip and odometer won't register miles as you ride, headlights brake and turn signals work but will not self cancel, radio works but does not show channel etc. on display but opening ceremony works, no tail lights, cruise comes on but won't engage, clock works when running but resets at restart of engine. I think that's most of it. I have ripped off tons of plastic and checked connections, fuses, etc. and found no problems. Reset ecm. No help. Also fan does not work and shows no f1 code. I hate to replace a 250+ dollar part like the ecm and find out that's not the problem. If anyone has experienced this and resolved it, I'd sure love to know.
Thanks
Tony

[harvey01]

Have you had the battery load tested? Did you check all ground locations?

[musketballs]

Yes to the load test and all the grounds I could locate.