I have 1993 Lebaron convertible with 3.0 automatic. A/C was not run for a few years as all r12 leaked out. Just converted to r134 by changing all parts. The clutch will not cycle, the radiator fan will not come on when temperature is reached, and airbag light is on. Replaced fan temperature switch. Chased all the wires and connections are good. Relays are good and parts engage when relays are manually jumped. Is there anything else that can cause this and that I can check before investing in New ECM?