I just replaced my fuel injection harness and now my A/C does not seem to turn on. Any help on where to start would be great. Thanks.
2001 Caravan Se 3.3L V6

 

just checked the wiring to the compressor and no power. Great another wiring problem.

 

Anyone know what the braided green wire is that is under the intake? I just found it broken off.

 

I would say to ck the fuses to the A/C. My first guess for the broken wire would be knock sensor.

 

checked the relay and fuses they are ok.

 

braided green wire is probably a ground.

 

ok so as of now, i've tested fuse and relay there is power going to the relay when you turn on the van. Still no power to the switch for the compressor. Also just jumped the compressor from the battery and it worked. Tried to test the psi on the low side, it started at 40 and slowly went up to 50. At 50 I heard a loud sound so I shut the van down. I think this might be to much pressure and it was trying to release. I checked the compressor again and it still works but I'm not sure of what to do next. Any help would be great thanks.

 

Found this on another site low pressure switch
(The pressure transducer you are looking for is near the right wiper module drain tube and the right strut tower and the high pressure service port. The plug has 4 pins/3 wires:dark blue/dark green (sensor ground), pink/yellow (sensor supply voltage), light blue/brown (sensor signal). The normal pressure to allow clutch activation would be a voltage reading of 0.451 to 4.519V between the light blue/brown and the dark blue/dark green wires. The pink/yellow should have 5.0V on it.)

I tried to test the switch itself and got values of .2 for the light/blue/brown and the dark blue/ green wires. The pink/ yellow had nothing. This was when the van was off and the switch unpluged.
Anyone know if this was a true reading?

 

Just curious if anyone out there knows how to jump the A/C pressure Transducer on my van. I've been told if done wrong it can fry the pcm so I would like to get some advice before doing so. Also, Chrysler's wants $170.00 + tax for a new one so I'd like to trouble shoot the problem before wasting my $. Any help on this subject would be great thanks.

 

A/C PRESSURE TRANSDUCER - GRAY 4 WAY CAV CIRCUIT FUNCTION
1 K900 18DB/DG SENSOR GROUND
2 F855 18PK/YL 5 VOLT SUPPLY
3 C18 18LB/BR A/C PRESSURE SIGNAL
4 - -

The 18DB/DG GROUND SENSOR SHARES THE GROUND WIRE WITH THE MAP SENSOR, TEMP SESOR AND THE KNOCK SENSOR. 18PK/YL 5 VOLT FEED ALSO SHARES THE VOLTAGE WITH MAP SENSOR. THE A/C PRESSURE SIGNAL IS CONTROLLED BY THE PCM. If you have a 5 volts at the map sensor, try using a jumper wire to the 5 volt wire and ck with either a test light or a DVOM for the 5 volts.If you have 5 volts at the connector then you may have an open supply wire to the transducer. In which case if its an open circuit, you'll need to open the harness and one fix the wire at the break or run a new wire from the map sensor to the transducer. AKA as a wire overlay.