Although the main heater and defroster relays appear to be working well and have power (both the main power and the ignition related circuit) the A/C dash mounted control unit is dead and the interior HVAC cooling fan is not operational. The main dash mounted A/C & Radio switch appears to control the ground circuit. The Radio switch works. The Red/Grey lead to the dash mounted A/C Control unit is supplying constant 12 volt power. The Blue/Red lead supplies 12 volt ignition related power. The Black with Red stripe lead supplies 12 volt ignition based power to the Cooling Fan Computer Control unit. We acquired another A/C dash mounted Control unit (not yet received) but, it seems unreasonable that the whole unit would all fail at once. What are we missing?
have the same problem?
Saturday, November 14th, 2015 AT 1:31 AM