Recently purchased a 94 LT1. The coolant temp gauge climbed close to 260 in traffic while the electronic read out never went above 220. At the time I could not verify if the cooling fan came on (AC was off) but when I got the car up to speed the gauge returned to a normal operating range 210 and the electronic readout to 185. I have verified that the cooling fans come on with AC selected and the coolant will not run hot with the fans on. Can someone tell me an easy way to verify if the fans function with AC off? Also, is the ECT sensor in the water pump housing the only source of water temp information for the computer. Does the gauge and electronic readout get its information from the same source? How many relays are involed and what are there locations? Any help would be appreciated.