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Switch could have burned out,but not likely.Use a hot and ground wire to the motor after unplug the wires to see if motor runs.First,after unplugging the motor,flip the switch on and check power on the plug with a test light.
After the car has been driven until warm,say 10 minutes,leave it running and feel the hoses going thru the firewall to the heater, there are 2 ,if they are both cold it needs a thermostat. If one is hot and one is alot colder , it's the heater core. If they are both hot it's a door on the inside. Thermostat on the 2.3 (assuming) is at the engine end of the top radiator hose,front of the head. Easy one
There is a Ford Technical Service Bulletin and Ford Repair Harness Connector Kit that may be your problem.
Article No. 96-21-4
CHARGING - GENERATOR DISCHARGE - LOOSE OR WEAK CONTACT AT GENERATOR HARNESS CONNECTOR
WIRING - GENERATOR HARNESS CONNECTOR DAMAGE - LOOSE OR WEAK CONTACT
FORD: 1985-90 ESCORT, TEMPO
1986 TAURUS 1986-90 CROWN VICTORIA 1987-92 THUNDERBIRD 1987-93 MUSTANG LINCOLN-MERCURY: 1985-87 LYNX 1985-90 TOPAZ 1986 SABLE 1986-90 GRAND MARQUIS, TOWN CAR 1987-92 COUGAR LIGHT TRUCK: 1985-90 BRONCO II 1985-91 AEROSTAR 1986-91 ECONOLINE 1986-92 RANGER 1986-93 BRONCO 1986-94 F-150-350 SERIES
This TSB is being republished in its entirety to update the Service Procedure outlined in the Action. ISSUE: When a generator fails, there are a few failure modes that may cause heat to be produced at the wiring harness-to-generator connector. This excess heat may damage the female terminals on the wiring harness, resulting in increased resistance. The increased resistance produces more heat. When the generator is replaced, the resistance produced by a damaged connector may damage the new generator and could result in a repeat repair, including installation of another generator. High resistance (caused by a damaged connector) will not go away until the damaged connector is replaced. ACTION: Visually inspect the harness-to-generator connector for damage (heat, corrosion, distortion and cracking) before installing a new generator. Install the Generator Wiring Harness Connector Kit (E5AZ-14305-AA) if the harness-to-generator connector is damaged.
The Generator Wiring Harness Connector Kit (E5AZ-14305-AA) contains the following:
One (1) Red Wire **** Connector
Two (2) Yellow Wire **** Connectors
One (1) Wire Connector Assembly
One (1) Instruction Sheet (I.S. 6849) PART NUMBER PART NAME
unplug blower motor jump wires to bat to see if motor is good or just take a test light and see if you have power and ground at motor usually its the resistence that burns or motor sometimes the switch in dash heats up and burns as well
you may have abad hot /cold blend door acuator.its bolted to air box. also make sure both heater hoses going to heater core are hot,if only one is hot and the other is luke warm or cold then you may have a clogged heater core,remove hoses (@ core) and flush with water hose go both ways a couple of times. good luck hope this helps.
From fuse 17, 10 amp, currrent travels through white/lt blue stripe wire to the a/c switch on the a/c/heater controls.
Coming out of control panel, a pink wire goes to the clutch cycling pressure switch located on the the a/c receiver/drier.
Coming out of the pressure switch, a pink/lt blue stripe wire goes to the engine computer,a nd at the same time same color wire goes to the IRCM, integated relay control module. Mounted on driver side strut module.
I see no red/y wire in the circuit. I think you should get the pink wires going into and out of the pressure switch.
Try jumpering the 2 terminals in the connector for the pressure switch to see if the compressor comes on.
I see a red/y wire coming off fuse 18, 10 amp. It goes to the warning chime module, instrument cluster, and warning chime module and passive restraint module. It also, under the hood, goes to the speed control amplifier. That's probably where he jumped from.