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Old 08-08-2007, 10:50 AM #61
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Mission accomplished, relay saved by Rando, no sparks..flames...just a nice steady A/C light. My $1.00 diode fit nicely without extra wire extensions and it lays covered with shrinkable spagetti along side the heater and MCR relays just as you said. Thank you sir for your fantastic assistance !
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Old 11-05-2007, 11:23 AM #62
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Well, my '03 4Runner made it to 96k miles before the A/C light started blinking yesterday. I tried to switch the A/C off and back on and it didn't work. I then turned it off for a few minutes, waited, then turned it back on and it worked all afternoon after that. I'm thinking about just swapping the relay with the foglight relay and just run with it. I almost *never* use the useless foglights, so I figure that'll give me another 50-90k miles before I have another relay start to go bad. At that point I can decide if I feel like buying the updated part number or not.

Any thoughts?

I don't really feel like rigging up the diode. Has anybody with the updated part number had the blinking A/C light problem at all? Is that new relay truly a permanent fix?
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Old 11-05-2007, 11:44 AM #63
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Quote:
Originally posted by RickyCRX
Well, my '03 4Runner made it to 96k miles before the A/C light started blinking yesterday. I tried to switch the A/C off and back on and it didn't work. I then turned it off for a few minutes, waited, then turned it back on and it worked all afternoon after that. I'm thinking about just swapping the relay with the foglight relay and just run with it. I almost *never* use the useless foglights, so I figure that'll give me another 50-90k miles before I have another relay start to go bad. At that point I can decide if I feel like buying the updated part number or not.

Any thoughts?

I don't really feel like rigging up the diode. Has anybody with the updated part number had the blinking A/C light problem at all? Is that new relay truly a permanent fix?
I've had mine in for about 10k with no repeat of the problem. Of course, the first relay lasted about 35k before it started to fail, so who knows how long the replacement relay will last?
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Old 11-05-2007, 12:09 PM #64
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Quote:
Originally posted by TechWrench
Nice detective work. I'm not used to seeing mechanical relays sealed like that, Thats why I thought it might be a SSR. I guess it is to keep them clean given the environment they work in. Though some of the other relays in the box aren't sealed, in any case. Those contacts are, with out a doubt, burnt. I'm hoping the fog light relay holds out until the new relay is available again. I think the original A/C relay lasted 3 years, so I hope we have some time before the next one fries.
I think the sealed relays contain nitrogen to reduce arcing, but with no diode shunt it will fail anyway.
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Old 11-10-2007, 01:04 PM #65
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Same issue here. It's been occurring off/on by itself over the last year. Thanks to all that helped identify and especially the one that provided that awesome solution.
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Old 11-25-2007, 08:43 PM #66
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Once again T4r.org comes through. The worst part of this entire problem was trying to search for 'blinking AC" when the forum doesn't allow 2 letter search terms. A search for 'blinking button' brought this thread to the top. ;)

I do have one slight addition to the excellent information already posted though...

I did the 12V outlet mod a while back and put the relay in the glove box just in case I ever needed it. Well you guessed it, it was yet the same relay. I plugged it in and cold air is in the house again.

My '03 doesn't have fog lights and in turn it didn't have the relay there for them either. I got to thinking and checked the one in the glove box and got lucky. I figure I have another 60-70k miles to get the diode installed. Hopefully.

Thanks again everyone...
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Old 11-27-2007, 02:21 AM #67
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Thumbs up

Hudos to Toyota of Dallas as their replacement relay fixed this defect that 1) was out of warranty and 2) isn't covered under the extended warranty and 3) was over $100 cheaper than in my back yard!

Part # 90987-02028 for $45.56. Up here in Ripeoff Country the stealer wanted over $160 bills for the exact same relay!! Canadian Stealers should wave flags that have us fools bent over with them stickin' it to us. Bast.ards! :xnuts:
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Old 01-12-2008, 02:16 AM #68
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I'm having problems with my AC. It only feels like the fan is on vs. the AC. However...the light doesn't blink. I've checked my relay, and...frankly I saw 5 with the 90987-02022 code. Could my AC problem be with the Relay being bad even though it doesn't blink?
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Old 01-12-2008, 03:05 AM #69
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Quote:
Originally posted by simple
I'm having problems with my AC. It only feels like the fan is on vs. the AC. However...the light doesn't blink. I've checked my relay, and...frankly I saw 5 with the 90987-02022 code. Could my AC problem be with the Relay being bad even though it doesn't blink?
I guess you could swap one of the other relays (fog lights) and give it a try.
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Old 01-12-2008, 03:17 AM #70
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Quote:
Originally posted by yabedude
I guess you could swap one of the other relays (fog lights) and give it a try.
Well Hello Captain Obvious. I just read this whole thread and I can't believe I didn't think of that!!!

However, with that being said...isn't that the same relay therefore not fixing the problem? Why does the same part work in all those other relays, but not the magnetic clutch? Anyway, I will definitely try that tomorrow and take my car for a long drive and see how it works. Thanks!
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Old 01-12-2008, 04:27 AM #71
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Presumably, the (old model) relay will die a slow death as an AC relay due to the power surge when the AC powers off (or is that on). That level of voltage isn't present in other devices. So if you do swap them and it works, I'd swap the relay back and buy a newer model replacement relay cause you'll eventually destroy the swapped one too.
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Old 01-12-2008, 04:39 AM #72
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I just had the same problem on my 03 today.

Swapped out the old relay for a new one and viola, No HEAT!!!

The Mechanic said the Horn Relay can be used as a replacement while you go and get the new A/C one. The Horn and A/C relays are apparently the same part.

Just no horning anyone! Yelling does the same trick though
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Old 01-24-2008, 01:09 PM #73
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NEVERMIND! SOLD!

Thanks...


If anyone needs one of these relays, let me know! I have an extra brand new, never used, sitting on the shelf in my garage. I'll sell it for $20 plus shipping.



Thanks,

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Old 05-11-2008, 11:55 PM #74
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You Guys Rock

Mine started Blinking on Friday. I was bummed all weekend as I was expecting to have to shell out some cash to get the A/C fixed. I decided to search, found this, swapped out the Fog Light relay and I have A/C. Going to the dealer tomorrow to get a new one. Guys thanks again!!
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Old 05-25-2008, 05:14 PM #75
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Thank goodness for this thread, I thought I was going to have to go to the dealer.

This past winter my light started to flash and since I didn't need the a/c I just turned it off. About a month ago I tried it again and it was working, until today.

Did a quick search here and found the problem was easy to diagnose and even fix. For now I banged the relay against the ground and its working again but I just ordered the newer relay from Partznet so hopefully I'll have the permanent fix soon.
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