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1996 GMC Safari - AC not working

Old Jun 17, 2020 | 04:54 AM
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Default 1996 GMC Safari - AC not working

Hi folks

Anyone have the electric diagram to my HVAC module ? I have something close but not exactly like in photo . wire colors are different .
I already checked fuses ...
I checked the volt in A/C PRESSURE CUT OFF SWITCH wire , it was 6v ...

how can I diagnostic the module ?

thanks


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Old Jun 18, 2020 | 01:54 AM
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I decided to start with the vacuum system ...
I follow the vacuum hoses , and I found this part disconected , I fix it , still not work .
I try to found the vacuum canister , where it located ? Cause the hose that need to go to , blocked .
please any help or directions .
anyone have a scheme to the vacuum hose and locations ?



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Old Jun 18, 2020 | 10:26 PM
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Here'* the electrical diagram for you HVAC system.
The vacuum diagram is lacking.. Just shows the evap system and a vac line coming from the throttle body to the dash. The reservoir should be near the apron of the wheel well.


Last edited by carfixer007; Jun 18, 2020 at 10:27 PM. Reason: add
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Old Jun 19, 2020 | 07:17 AM
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Thank you
Do you know who supply volt to the HTR-AC fuse ?
cause I get 7V there , and when I disconnect the fuse I got 10V (in the supply side)
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Old Jun 19, 2020 | 11:39 AM
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Ok , I found it , orange wire in the ignition switch .
now the vent work but the air not cold . The cluch compressor no engage .
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Old Jun 19, 2020 | 11:02 PM
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Check gas pressures.
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