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You have fuses and relays . The fuses are or should br labled inside each cover if still there as well as on the fuse block itself, If not I can look under the hood of mine and tell you. The relays from left to right thats passenger to driver and numbered including the empty spaces as mine hase three on the right and two on the left with three emty slots in between. Now Olds seems to have kept this araingement for some time also my '98 88 has ABS as part of TCS but no relays there and diferent climate controls over the years it is posible you have more or less than are presnt on mine the complete list is as follows
#1 - AC compressor control for the compressors clutch
#2 - Horn relay
#3 - AC blower fan motor on, at low speed on the '98
#4 - AC blower motor off or high speed depending on year, not present on my "98
#5 - ABS pump relay ,not present on my '98
#6 - ABS Main relay also labled as pump relay for some years, not present on '98
#7 - High speed cooling or radiator fan
#8 - Low speed cooling or radiator fan
There are two relays for the fans. One is a low speed relay and the other is a high speed relay. There are also fuses for the fans high speed and low. Take the cover off or the under hood fuse box and on the inside of the cover it will give a diagram of the fuses and relays. Try swapping the relays with something else and see if the fans go to high when you turn on the A/C as it always should. Sound like a bad High Speed Fan Relay to me but check it out.
Your ignition switch is bogus. High speed runs directly off the speed control but the lower speeds go thru the ignition switch. Do not know why but that is the way it is!!!!!!!!
Replace the ignition switch and you will be back in business.
What are the pressures?And the low side line going into the firewall should be cold.We need to know what the pressures are,and is the evaporator sweating>and giving off condensation?If the vents are blowing out 80 degrees,then the temp door is not moving .It is either a door actuator motor,or a vacuum that is not working the temp door,check for a bad vacuum under the hood,going into the firewall.
Low on R134a, you need to have the system recharged. Try to stay away from the do it your self kit that most Auto Parts store carry.
Below are normal car AC pressure readings with 134A
Normal readings on high and low side with AC OFF (static pressure) – Depends on outside temperature, but normally is between 80-105 PSI
Normal low side reading with AC on high speed and MAX & engine at 800-1000 RPM’s – Ranges from 25-35 PSI
Normal high side reading ranges from 200-350 PSI
Don’t assume that if adding little Freon is good that adding a lot is better! Overcharging just a little can decrease the performance of the system and possibly damage the compressor.
recharge your system, it;s low on refrigerat, there is not enough liquid going into the evap to help maintain cooling, hence the speed of the compressor. install gauges to check pressures at idle, if not to spec , recharge. if it's low you have a leak to repair. also make sure your AC condenser is clear. GOOD LUCK. RDJRP
there are 2 ports one for low pressure and one for high pressure. the low pressure is bigger in diameter and is usually close to the dryer and or fender and firewall. the high pressure is near the condensor on the fron of the vehicle. if there are caps for the ports low will be blue and high will be red. low side pressure should be 35-50 psi and high pressure should be 135-150 psi
i had this same problem in my chevy prism-- my fan regulator had broken. (apparently it usually happens around 100k miles, i hear) in my car, the vents wouldn't even blow air at all on anything but high--- not just AC, but normal vented air as well.
cost about $80 to have the problem fixed by my mechanic in Jersey. hope that helps!
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