Relay Question

[1996QShip]

I have a 92 active Q. And I've been having difficulty with my AC. So I kinda got my ac running for about 10 mins. I've been suspecting mu ac relay to be faulty. So earlier today I exchanged the ac and the cruise control relays to test it. My ac worked for about 5 mins. then I blew the cabin ac fuse. I then drove the car to check if the cc was working. And it was. But the cc light did not come on in the dashboard. So I'm wondering if the two relays are the same or not. I know they have different part numbers. But I wonder if they're the same functioning capacity?
Thank you in advance

[maxnix]

Check the posts on rehabilitating the motor and replacing the Darlington Bridge.

[goody90q45]

...... So I'm wondering if the two relays are the same or not. I know they have different part numbers. But I wonder if they're the same functioning capacity?.........

Tough to see without a magnifying glass but the large universal relays (blue, green, black, etc.) have the schematic for their function on the top surface of the relay cover. What are the 2 P/N's that you have/need? I've got a box full.

Check the posts on rehabilitating the motor and replacing the Darlington Bridge.

What Brian refers to is if the problem is the fan motor working only on high speed or not working at all then it could be a bad darlington resistor which is a component of the fan control amplifier.

What is the problem? No heat? No cooling? Fan not working?

[1996QShip]

Thanks for responding so quickly guys. Brian, I don't think it's my Darlington as the fan and blower range the whole spectrum in velocity. I also followed the HA portion ignite FSM. It resulted in a code 41. What lead to all this was my fan has been blowing ambient air for the past 9 months or so. So today I exchanged the cc relay with the AC relay. Ive deduced the AC relay is no good. And I'm speculating I screwed up my CC relay as well. So, Mike if you can help me I'd be very appreciative. The respective p/n are: 25230-c9980, 25230-.

[1996QShip]

Additionally, the relays are both blue. And Brian, the car had neither heat or ac. Help as Louisiana is heating up quickly. VERY QUICKLY!

[goody90q45]

The respective p/n are: 25230-c9980, 25230-.

The last 5 numbers of the 2nd relay are missing, or is it unreadable?

[1996QShip]

Can't figure em out. That's why I was hoping they're both the same.

[goody90q45]

I'm looking at 7 of them and except for what I think is a lot # above the P/N they look to be the same and the schematics on the tops are the same.

I have two other types of blue universal relays but the P/N's are different as well as the pin layout. You wouldn't have been able to swap these in.

Need a couple of the 25230-C9980 relays? Send me an email....msg7941atcomcastdotnet.

[1996QShip]

Email sent

[1996QShip]

So I replaced my ac relay and my ac fuse inside. And voila it began blowing ice cold air. After some sceptisism, then relief. I was soon pontificating in the many technical facits of the infiniti's ac system.... For about 10 mins....DAMMIT! It seems my ac worked perfectly in neutral for 15 mins atleast. I did the self diagnosis showing me code 41. The blower fan is operating at 75% full speed max. But it blows the relay and the fuse when I begin driving. I'm at a loss. Any ideas? ANYONE. Anyone PLEASE.

[Lokim]

Just for grins, try unplugging the A/C compressor clutch connector and see if the fuse still blows. You may have a short in that circuit, or your blower motor may be drawing too much current. Go down to the parts store w/ your DMM and check the resistance of a replacement motor and compare to the readings of the motor in your car. If your car's is higher (by several ohms or more) you're likely just drawing too much current.

[1996QShip]

What's a "DMM"? And can I eat it?

[Lokim]

Sorry, digital multimeter. I forget that not everyone's a technician.

[Q451990]

My Mom had an '88 Maxima that would blow fuses occasionally. It turned out that the brushes in the motor were worn to the point that they were almost popping out of their sleeve, so one would get cocked a little crooked, causing a short, and pop the fuse. You could put a new fuse in, get a few days, and then it would happen again. So I would certainly look in that direction.

If you have an "old school" automotive electrical rebuilding place in town, they may be able to clean your motor and replace the brushes - which I would consider superior to a parts store motor.

Heath

[1996QShip]

Thanks Heath. I cleaned my blower motor with some electronic cleaner. Then I put some dielectric grease on the moving parts. Replaced the relay and fuse. Now everything seems to work. There was alot of brown powder over everything on the motor and fan. Hopefully this last for the summer. I can find anybody to replace the brushes as I'm sure they're very worn and doing exactly what you think. Also my drain from the evaporator is clogging off at times. Any idea if they make a drain snake type thing for cars?

[qship96]

That "brown powder" is actually the brushes as they wear.....replace before you lose fan in hot summer!

[Q451990]

I can tell you what not to do to clean out the drain... don't jab a screw driver in there. I had a truck with a badly leaking evaporator when I bought it. When I pulled it it had a perfect imprint of a flat blade screw driver in it with a hole on one edge. I like to spray compressed air in there to loosen everything, but I think the only real solution is to take everything apart to clean it. You might also try a pipe cleaner...

Heath

[1996QShip]

Used compressed air from the bottom which didn't help. I then used a wiper blade without any wire pieces. And that worked the best. Also the blower motor was blowing kinda slow. So I cleaned it very well. And that's working too. Looks like a fully functional ac as summer approaches thanks to my NICO friends

[Infinitiguy19]

Just make sure the relays have the same diagram of the pin layout when swapping them.
http://www.the12volt.com/