Hi my A/C isn’t working. I checked my fuses and 15A for condenser fan wasn’t there so I got the spare fuse and put it in, but my car wouldn’t start after doing that. My next guess would be the 40A since its turning on but not blowing air. Where can I get that big fuse box thing? autozone? Could that be the reason my Condenser fuse makes my car shut off when i start it? (It turns on fine when i take the 15A Out)
Are you talking about the blower fan, [heat and A/C air] or the condenser fan, [condenser fan cooling]?
If you mean fuse 20 - 15A, [hot at all times] it is the condenser fan and “Radiator Fan Control Module”, [USDM] power, I have no idea why it would prevent car from starting.
I will have to check if there is anything else on that circuit, but from what I can tell it is only the condenser fan, [through relay] and the “RFCM” that it powers.94
[QUOTE=fcm;2108049]Are you talking about the blower fan, [heat and A/C air] or the condenser fan, [condenser fan cooling]?
If you mean fuse 20 - 15A, [hot at all times] it is the condenser fan and “Radiator Fan Control Module”, [USDM] power, I have no idea why it would prevent car from starting.
I will have to check if there is anything else on that circuit, but from what I can tell it is only the condenser fan, [through relay] and the “RFCM” that it powers.94[/QUOTE]
yea its weird when i put fuse 20 -15A (Condenser Fan) it won’t let me start the car…
my real problem is my fan for the A/C and heat. I thought not having my fuse for the condenser fan would prevent air from coming out my A/C vent.
I also thought it was fuse 40A (heater blower?) that was the problem from searching the site, so i pulled it out and it was rusty in color, so i replaced it. That didn’t help.
Then i finally noticed air was blowing out, but only through the front windshield air vent. As if it was staying at the front defogger setting. (coldness and heat of the air coming out correlate with how i turn the dial)
BUT… when i click another setting such as blow air toward face and feet, or any others, it doesn’t change. it stays on the front defog setting. How do i fix this?
My switches for circulate air / take in outside air seem to work since there’s a big change in sound when i click either.
(p.s. the green/orange lights for these buttons light up when i click them, but don’t stay on… is this a big issue)
The “Mode Control Motor” is not working, either it is defective, [most likely] the “Heater Control Panel” is defective, [less likely] or possibly the wiring between them or a grounding issue.
Start with the “MCM”, it is easy to test, looking at the plug where it is plugged into the motor, it is an 8 pin plug with 7 leads…
A green that changes to black, [ground]
A yellow/blue, [defrost].
A yellow, [heat/defrost].
A blue/white, [heat].
A green/white, [bi-level].
A yellow/red, [vent].
A black/yellow, [12V+].
Using jumper leads, supply 12V+ to the black/yellow lead/terminal and a ground to the green lead, [that turns black at the connection] then using a 3rd jumper, supply a ground to each of the other leads, [one at a time] motor should move, if not, replace the motor.
If it does turn, remove the ground jumper from the green lead and ground the others, [one at a time], motor should move, if not, repair ground, [the green is common with the black ground lead at the “HCP”, if one is bad, both may be.
If it does turn, ground is not the problem, remove the 12V+ jumper to the black/yellow lead and ground the other leads, [one at a time], motor should move, if not, check fuse 17 - 7.5A, [hot in run] in under dash fuse box, test for power at the fuse, [both test tips], using a meter or 12V test light, [ign. switch must be in run position] if there is power at the fuse, find the connection problem between fuse box and MCM.
If motor runs without the ground jumper to green and without a 12V+ jumper to the black/yellow, but still grounding the other leads, the problem is at the HCP or wiring, that can be tested by supplying a ground to the same leads, [except green, black at HCP], if motor moves, problem is at the HCP, or wiring to it, check for 12V+ on the black/yellow and a ground on the black, if good, replace the control head.
You can start your testing at the HCP end, it makes no diff. 94
Found another 15A was blown, i believe it was Cooling Fan, i forget the fuse number. Put that and the 15A in fuse 20 and my car started fine.
fuses (including 40A) did not fix my blower problem, so time to find friends who know more about electrical stuff to help me test my MCM. will get back at you after i have tested this stuff. btw if its a bad motor where do i get one? tnx again fcm! you the man