Electrical A/C added to deleted car questions....

ggradtech

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Jun 17, 2016
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My 93 (4 cylinder converted to 5.8) has no A/C. It did at one time, and the condenser fittings look like they were basically “capped off” at the firewall. I’m not sure about the “health” of the condenser, but would rather roll the dice and see if it’s ok to use 1st and only remove my dash if I need to. Would I need the electrical relay that controls the idle and bypasses the AC under WOT? I don’t have those electrical parts installed and don’t know if they are needed or not. Will the car idle work properly if I added A/C but didn’t install the relays/ WOT disable thingy? Thanks.
 
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Mustang5L5

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I would need to reference the wiring diagram but i do believe compressor power does route through the WOT relay. If that's the case, it needs to be added.

The wiring should be present in the harness if you are using an OEM harness. Are you? If so, it should be in the area of the pass side strut tower.
 

jrichker

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The following are diagrams courtesy of Tmoss & Stang&2birds

Complete computer, actuator & sensor wiring diagram for 91-93 Mass Air Mustangs


Engine mounted fuel injector harness
mustangEngineHarness.gif


5.0 wiring diagram for Fuel Injectors, Sensors, and Actuators


See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host) for help on 88-95 wiring; http://www.veryuseful.com/mustang/tech/engine/ Everyone should bookmark this site.


TFI module wiring for 94-95 Mustang GT
http://www.veryuseful.com/mustang/tech/engine/images/Mustang-94-95-IgnitionControlModule.gif

Complete computer, actuator & sensor wiring diagram for 94-95 Mustangs

Complete computer, actuator & sensor wiring diagram for 91-93 Mass Air Mustangs

Complete computer, actuator & sensor wiring diagram for 88-90 Mass Air Mustangs

5.0 wiring diagram for Fuel Injectors, Sensors, and Actuators

Main body EFI wiring harness

Ignition switch wiring

O2 sensor wiring harness

Vacuum diagram 89-93 Mustangs

HVAC vacuum diagram

TFI module differences & pin out

Fuse box layout

Mustang 5.0 Lights and Radio schematic, by TMoss:
http://www.veryuseful.com/mustang/tech/engine/images/mustangFoxLights-Radio_diag.gif

87-92 power window wiring

93 power window wiring

T5 Cutaway showing T5 internal parts

Visual comparison of the Ford Fuel Injectors, picture by TMoss:

Convertible top motor wiring http://www.veryuseful.com/mustang/tech/engine/images/mustang88VertTopMotorCkt.gif

Engine mounted fuel injector harness

Location of the TPS, IAB, and the 10-pin connectors on a 5.0, picture by TMoss:

Starter circuit

Alternator diagram for 94-95 Mustangs.
 
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