Question about 1993 Geo Metro

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Air conditioner when air is turned on the switch on dash panel lights up. Low pressure switch activates electric but a/c relay does not activate. you can activate the ac relay and fans come and the compressor clutch activates and compressor cools. any other pressure switches i need to find?

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You need to check for proper operation at the relay. make sure the relay is getting the cammand.

also you may have a evap temp sensor keeping you shut off. its in side the car usually

Posted on Jan 29, 2009

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2 Answers

Lots of power, dash lights up but no ignition power to starter, relay changed, neutral start switch changed, fuses good.


Well, looking at the schematic, there is the IGN A (Fuse 6) in the under-hood fuse block feeding power to both the ignition switch and to the NO contact of the starter relay. Turning the ignition switch to the START position sends this voltage thru the CRANK (Fuse 8) in the instrument panel fuse block and thru the PARK/NEUTRAL position switch, thru the starter relay coil to ground. This should activate the Starter relay and pass voltage to the starter solenoid to ground, activating it. One the starter solenoid activates, batter power is sent to the starter motor, activating it. If, as you say, the fuses are good, the starter relay was replaced and is good, and the Park/Neutral position switch was replaced and is good, then then only items left are the ignition switch itself, the starter solenoid/motor, or the wiring of the circuit.

Mar 12, 2015 | 2000 GMC Yukon XL

1 Answer

Fuse for the alarm system


Here is the full list of fuses for you! and for the car.

Fuses on E-box, on left in Engine Compartment

Fuse 1 - Not assigned

Fuse 2 - 10/15A - Engine control unit

Fuse 3 - 5A - Radiator fan control unit

Fuse 4 - 5/10/15A - Lambda probe heater,
Lambda probe 1 heater after
catalytic converter

Fuse 5 - 10A, 20A - Lambda probe heater1,
Lambda probe 1 heater after
catalytic converter,
Fuel system diagnostic pump,
Charge pressure control solenoid
valve,
Exhaust gas recirculation cooler
change-over valve,
Crankcase breather heater element,
Vacuum pump for brakes

Fuse 6 - 5A, 10A,15A - Fuel system diagnostic pump,
Throttle valve module,
Activated charcoal filter system
solenoid valve 1,
Continued coolant circulation pump,
Auxiliary air heater heating element

Fuse 7 - 20A, 5A - Ignition transformer,
Fuel pressure regulating valve,
Fuel metering valve

Fuse 8 - 10A - Throttle valve module,
Activated charcoal filter system
solenoid valve 1

Fuse 9 - 5A - Automatic glow period control unit,
Electric fuel pump 2 relay,
Fuel pump relay

Fuse 10 - 5A - Speedometer sender,
Brake light switch

Fuse 11 - Not assigned

Fuse 12 - 5A - Coolant circulation pump

Fuse 13 - 5A - Water pump

Fuse 14 - 5A - Engine control unit

Fuse 15 - 30A - Voltage stabiliser

Fuse 16 - 30A - ABS control unit

Fuse 17 - 30A - Automatic gearbox control unit

Fuse 18 - 20A - Automatic gearbox control unit

Fuse 19 - 1A - Onboard supply control unit

Fuse 20 - 30A - Onboard supply control unit (AW0)
Automatic intermittent wash and
wipe relay (AW1)

Fuse 21 - 50A - Secondary air pump motor

Fuse 22 - Not assigned

Fuse 23 - 40A - ABS control unit

Fuse 24 - 50A - Trailer detector control unit

Fuse 25 - 50A - Terminal 15 voltage supply relay 2

Fuse 26 - 60A - Automatic glow period control unit

Fuse 27 - 60A - Radiator fan

Fuse 28 - 40A - Onboard supply control unit (AW1)

Fuse 29 - 40A - Onboard supply control unit (AW1)

Fuse 30 - 50A - Terminal 75 voltage supply relay 1

Fuse 31 - 30A - Amplifier

Fuse 32 - Not assigned

**************************************************

Fuse assignment - Interior Fuse Panel

Fuse 1 - Not used

Fuse 2 - 5A - Electronic steering column lock control module

Fuse 3 - 10A - Instrument cluster control module

Fuse 4 - Not used

Fuse 5 - Not used

Fuse 6 - 10A - Vehicle electrical system control module,
Interior ceiling lights,
Tail lights

Fuse 7 - 5A - Fog lamp relay,
Instrument panel and switch illumination dimmer switch,
License plate lamps,
Vehicle electrical system control module

Fuse 8 - 7.5A - Windshield and headlamp washer pump switch,
Windshield washer pump

Fuse 9 - 5A - Airbag control module

Fuse 10 - 10A - Right steering column switch

Fuse 11 - Not used

Fuse 12 - Not used

Fuse 13 - 5A - Automatic dimming interior rearview mirror,
Light recognition sensor,
Parking aid control module,
Air quality sensor,
High pressure sensor,
Climatronic control unit,
Tire pressure monitoring button,
Back-up lamp switch,
Left washer nozzle heater,
Right washer nozzle heater,
28-pin connector

Fuse 14 4- 10A - Left steering column switch,
ABS control module,
Light switch,
Airbag spiral spring/return spring with slip ring,
Fuel pump control module,
Data bus on board diagnostic interface

Fuse 15 - 10A - 16-pin connector (diagnostic connector),
Instrument panel and switch illumination dimmer switch,
Headlamp range control adjuster,
Auxiliary heater operation relay,
Mass airflow sensor,
Positive crankcase ventilation heating element,
Left front headlamp,
Left headlamp beam adjustment motor,
Right front headlamp,
Right headlamp beam adjustment motor,

Fuse 16 - 10A - Engine control module

Fuse 17 - Not used

Fuse 18 - 15A - Left front headlamp

Fuse 19 - 15A - Right front headlamp

Fuse 20 - 10A - Automatic transmission control module,
Selector lever sensor system control module,
Tiptronic switch,
Climatronic control unit,
Ignition/starter switch

Fuse 21 - Not used

Fuse 22 - 10A - Ignition/starter switch,
Converter box,
Alarm horn,
Interior monitoring sensor,
Alarm horn relay,
Dual tone horn relay

Fuse 23 - 10A - Vehicle electrical system control module,
16-pin connector (diagnostic connector),
Light switch,
Rain/light recognition sensor,
Compass magnetic field sensor,

Fuse 24 - 10A - Vehicle electrical system control module,
Access/start authorization control module

Fuse 25 - 15A - Automatic transmission control module,
Selector lever sensor system control module,
Multifunction transmission range switch

Fuse 26 - 15A - Brake system vacuum pump

Fuse 27 - Not used

Fuse 28 - 40A - Auxiliary heater operation relay

Fuse 29 - 1A - Vehicle electrical system control module,

Fuse 30 - 20A - Cigarette lighter,
12 V socket,
12 V socket 2,
Blocking diode

Fuse 31 - 30A - Light switch

Fuse 32 - 20A - Light switch

Fuse 33 - 40A - Heater/heat output switch,
Fresh air blower relay,
A/C control module,
Fresh air blower switch

Fuse 34 - 15A - Left front headlamp,
Left front headlamp,
Instrument cluster control module

Fuse 35 - 10A - Steering column electronics control module,
Instrument cluster control module,
Signal horn activation,
Data bus on board diagnostic interface

Fuse 36 - 25A - Vehicle electrical system control module

Fuse 37 - 15A - Left front headlamp DRL

Fuse 38 - 15A - Right front headlamp DRL

Fuse 39 - 15A - Low beam relay

Fuse 40 - 15A - Towing recognition control module

Fuse 41 - 15A - Towing recognition control module

Fuse 42 - 20A - Towing recognition control module

Fuse 43 - 30A - Front passenger door control module

Fuse 44 - A25 - Rear window defogger relay,
Vehicle electrical system control module

Fuse 45 - 30A - Driver door control module,
Front passenger door control module

Fuse 46 - 30A - Left rear door control module,
Right rear door control module

Fuse 47 - 15A - Fuel pump control module,
Fuel pump relay,
Fuel primer relay

Fuse 48 - 20A - Vehicle electrical system control module,
Vehicle electrical system control module,
Vehicle electrical system control module,

Fuse 49 - 20A - Climatronic control unit,
A/C control module

Fuse 50 - 30A - Front seat heating control module

Fuse 51 - 30A - Power sunroof control module

Fuse 52 - 20A - Dual tone horn relay

Fuse 53 - 15A - Front seat heating control module

Fuse 54 - 15A - Fog lamp relay

Fuse 55 - 20A - Light switch,
Left steering column switch

Fuse 56 - Not used

Fuse 57 - 15A - Radio,
Radio/navigation display unit control module

Fuse 58 - 1A, 30A - Telephone transceiver
DC/AC converter with socket, 12V-230V

Fuse 59 - 30A - Amplifier

Fuse 60 - 30A - Auxiliary heater control module


Hope this helps

--N

May 31, 2014 | 2010 Volkswagen Jetta

2 Answers

The air conditioning does not blow through front vents but through windshield vents, what is the problem?


This is a common problem on all Astro/Safari vans. The problem is a leak in the vaccum lines that control the vaccum switch responsible for changing air direction from the defrosters, dash vents, floor vents..etc.
Many of the problems that plaque the Astro/Sarfari vans and many other "Mini-Vans" is the build up of excess heat in the engine compartment. It\'s a tight place to put a V6-4.3 Vortec engine and the heat generated bounces back and cooks everything on the engine (coils, modules, sensors, wiring, and of course plastic vaccum hoses). No need to mess with your switches or anything behind the dash -- replace those thin plastic vaccum hoses to operate the vaccum switch (located just below the A/C canisters, to the right of the heater/ac blower housing) and your dash switches will magically send heated or cooled air where you want it.

Oct 25, 2010 | 2003 GMC Safari

1 Answer

Where is the air conditioner blower fan relay on 1996 Jeep Grand Cherokee located?


The blower fan relay is located in the fuse box on the driver's side fender-well. A Jeep Cherokee uses an electric fan as an auxiliary fan for engine cooling and for cooling the air conditioning condenser when the air conditioning is in operation. A radiator temperature-sensing switch that activates the fan relay at 198 degrees F turns the fan on and controls its operation. The temperature drops when the vehicle is in motion and the switch turns the fan off. When the air conditioning system is in operation, the air conditioning relay supplies power to the fan relay via a fan diode downstream from the ignition switch. This diode activates the fan relay and keeps the fan operating as long as the air conditioning is on. Thanks. you can rate this solution and show your appreciation.

May 18, 2010 | Cars & Trucks

1 Answer

A/c not working blows hot air add 134a need help 99 f150 4.2 v6


Before you add freon to measure how much freon is clucht checks if the compressor is activated when you connect the air conditioner if the clucht not activated and have a good pressure in the system looks at low pressure switch that goes in the drier and that very often these are damaged, you also have to check the fuse and relay the compresor.Thanks

Mar 28, 2010 | 2004 Ford F150

2 Answers

AC Will not turn on in 1997 E320


HI. Here is a complete check list that will help you trouble shot thsi issue. You will find the problem in one or more of these areas stated below.

1. Check Drive Belts - The air conditioner utilizes a drive belt that supplies power to rotate the compressor, which is basically a refrigerant pump. If the belt fails the compressor has nothing to drive it, inspect and replace as needed to restore operation. If belt is intact proceed to the next step.

2. Check for Compressor Clutch Engagement - Turn the air conditioner to the "on" position and set controls to the coldest setting. Start the engine and allow to idle. Then open the hood and inspect the clutch at the front of the compressor, is it turning? "Engaged" if so, the system has enough refrigerant to activate. If the system is low on refrigerant it will not work properly. In this case an air conditioner recharge kit is needed to recharge the system. If the system is low on refrigerant it could cycle on and off, making a ticking noise. If the compressor clutch is not turning proceed to next step.

3. Inspect for Refrigerant Leaks - If the system has a large leak and no refrigerant remains it will not activate. First test system for a static pressure charge, with the engine off attach an ac gauge to the low side pressure port and check the state of charge. Depending on outside temperature there should be between 50 psi and 80 psi. (Cool and warm). A refrigerant leak detector is needed to inspect for leak, but if you do not have a leak detector there is an alternative method. The air conditioner system is designed to run with oil suspended in the refrigerant to lubricate the system. Check for oily residue outside the system by inspecting all hoses, compressor, condenser, evaporator or receiver drier and replace any component that has failed.

4. Inspect Fuses - Check under dash panel and under hood power distribution center. Replace failed fuses as needed, recheck system. If the new fuse fails when reinstalled a short circuit is present and requires diagnosing with a wiring schematic, follow circuits to locate short, repair as needed and recheck system.

5. Check Temperature Control Vents - The vents inside your car are controlled by a cable, electrical servo or vacuum servo. If the temperature blend door is not functioning properly it will cause warm air from the heater to exit the vents. To check this start the car and allow the engine idle, next turn the blower motor speed on low, switch the temperature control from warm to cold while your ear is close to the vents. You should hear the door move inside the heater box as it swings from open to close. If not, insect for a vacuum leak or a shorted motor in the servo, repair the leak or replace the servo motor.

Sep 09, 2009 | 1994 Mercedes-Benz C-Class

4 Answers

1998 Ford Explorer a/c not working properly


Had the same problem on 98 Eddy Bauer we have. Have you noticed that it has a tendency to belch out hot air and the blower speed slows down mostly when you accelerate or give it a little more gas to climb a hill or an overpass or even pass somebody? If this is the case there is a pressure switch that's hooked into the intake manifold were it can sense a drop in pressure and when it does it drops the ac clutch out and slows the dash blower down till the pressure comes back up. JUMP IT OUT. All your problems will go away. Thats in there to unload the engine during acceleration and heavy loads and after the switch ages it gets trigger happy and lazy about closing to bring the ac back on.

Pat - Houston

Aug 27, 2009 | 1998 Ford Explorer

2 Answers

2001 Passat A/C blowing intermittant cold and


HI. this may be a charge issue and the system should be recharged if this is the case. I recommend going the the below checks so that you may eliminate other causes as well before the recharge.

1. Check Drive Belts - The air conditioner utilizes a drive belt that supplies power to rotate the compressor, which is basically a refrigerant pump. If the belt fails the compressor has nothing to drive it, inspect and replace as needed to restore operation. If belt is intact proceed to the next step.

2. Check for Compressor Clutch Engagement - Turn the air conditioner to the "on" position and set controls to the coldest setting. Start the engine and allow to idle. Then open the hood and inspect the clutch at the front of the compressor, is it turning? "Engaged" if so, the system has enough refrigerant to activate. If the system is low on refrigerant it will not work properly. In this case an air conditioner recharge kit is needed to recharge the system. If the system is low on refrigerant it could cycle on and off, making a ticking noise. If the compressor clutch is not turning proceed to next step.

3. Inspect for Refrigerant Leaks - If the system has a large leak and no refrigerant remains it will not activate. First test system for a static pressure charge, with the engine off attach an ac gauge to the low side pressure port and check the state of charge. Depending on outside temperature there should be between 50 psi and 80 psi. (Cool and warm). A refrigerant leak detector is needed to inspect for leak, but if you do not have a leak detector there is an alternative method. The air conditioner system is designed to run with oil suspended in the refrigerant to lubricate the system. Check for oily residue outside the system by inspecting all hoses, compressor, condenser, evaporator or receiver drier and replace any component that has failed.

4. Inspect Fuses - Check under dash panel and under hood power distribution center. Replace failed fuses as needed, recheck system. If the new fuse fails when reinstalled a short circuit is present and requires diagnosing with a wiring schematic, follow circuits to locate short, repair as needed and recheck system.

5. Check Temperature Control Vents - The vents inside your car are controlled by a cable, electrical servo or vacuum servo. If the temperature blend door is not functioning properly it will cause warm air from the heater to exit the vents. To check this start the car and allow the engine idle, next turn the blower motor speed on low, switch the temperature control from warm to cold while your ear is close to the vents. You should hear the door move inside the heater box as it swings from open to close. If not, insect for a vacuum leak or a shorted motor in the servo, repair the leak or replace the servo motor.

Aug 06, 2009 | 2001 Volkswagen Passat

2 Answers

My 96 grand prix's air conditioner compressor will not turn on when the switch is activated. I have replaced the large fuse under the hood but that still hasn't solved the problem. The indicator light on...


that light goes on mostly likely cause you need freon. the compressor will not go on if there is no freon. buy a userfriendly can at autozone. put it in low pressure valve(blue)  if it works but no cold enough air check under your hood for the proper pounds or ounces needed of freon.  if it doesnt work its your compressor.  GOOD LUCK! :)

Apr 25, 2009 | 1996 Pontiac Grand Prix

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