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Old 07-12-2012, 04:11 PM #31
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A/C light flashing

This was very good information. Thanks! I simply removed the relay and put it back in and the AC now works again. I will of course order a new relay as a backup.
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Old 12-19-2012, 07:02 PM #32
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Really appreciated the pic to go along with the explanation... My a/c light began blinking three days ago... The guys in this forum saved me a "grip"! I went to Napa, got the a/c Clutch control Relay, used their pliers, and got out of there in 3 mins! All for the sensational price of $16.57. Thanks a mil!
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Old 03-30-2013, 05:11 PM #33
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Talking Thank you so much....

I followed your instruction step by step. proves that some things still work when you bang them, reminds me of my parents old tube tv.

I remove the relay banged it on the ground put it back in and voila... AC works.

This forum is freaking awesome......


2004 V8 SR5 Sports 105K KMs
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Old 05-05-2013, 05:19 PM #34
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so I have had the blinking a/c light in my 2003 and this thread helped a lot. Switched the grey relay (MG CLT) with the front fog light really, a/c works but my fog lights also work... is this normal?? any suggestions of why this happens and will it cause more problems?
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Old 03-21-2014, 02:36 PM #35
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Blinking Light 2003 4runner a/c problem

Read a thread about how to fix the a/c problem by changing the relay. Worked like a charm!!!! The relay cost a total of $25.00. It would have cot me an arm and a leg at the dealer. Picked up the relay, Which is OE Denso part at a place called Bap Geon. They ordered it for me and I had it within a couple of hours. A/C running great and you know i need it here in Houston with the summer heat coming up quickly.
Thanks for the help and saving me tons.
Henry
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Old 03-21-2014, 09:39 PM #36
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Blinking ac light

Mine did the same at 130k....you can use the relay for the rear dc outlet and switch it with the defective ac relay to get instant air...I don't use the rear dc port so it"s not much of an issue....great info here ..now i know whick updated part to get for the ac fix !!
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Old 07-10-2014, 09:38 AM #37
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This worked for me. I replaced the relay for $25 and my AC is working just fine. Thanks so much for a detailed post.
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Old 08-02-2014, 05:03 PM #38
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Smile 2003 Toyota 4-Runner A/C Light Blinking

2003 Toyota 4-Runner A/C light started blinking and the a/c was blowing hot air. Happened suddenly but previously worked great. Only have 55,000 miles on car. After reading this website, with most of the check points being the MG CLT relay (90987-02022--updated part 90987-02028), this old blonde (me) got brave and found it on my vehicle. With some assistance, bought a relay, replaced it, and the vehicle works excellent again. This is the only thing that has happen to this vehicle. Only have dealership change oil & filter. Our motto is if it works--don't fix it--so we skip the maintenance checks. With your assistance I have saved lots of money. No telling what the Toyota Dealership would have charged us. THANKS EVERYONE for the suggestions & part numbers.
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Old 08-03-2014, 11:10 AM #39
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I Have a Digi-Key Z2001-ND replacement relay FS. I ordered as a spare in 01/2010 when I replaced the Mag Clutch Relay in my 04. Replacement was in my 04 when I traded it last month, over 4 years. Never an issue again.

$6 Shipped USPS First Class in padded envelope or $12 Shipped in USPS Small Flat-Rate Box. payment via Paypal.

I paid $8.27 in 2010, These go for over $9.50 ea before shipping and tax now.

Extra tab is already removed on this relay so it is plug and play when you get it. No fitment issues due to larger size in fuse/relay box. New relay is black old is white in pic.

Thanks for looking. PM Me.
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A/C Light Blinking on 2003 LTD-img_5537-jpg 
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08 4x4 Salsa Red SE V-6 Daystar 2.5/1.5", 265/70 Revo 2s, SpiderTrax. Traded-in on 09/14/11 W/55k miles for 08 Sequoia 5.7L
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Old 09-13-2014, 04:42 PM #40
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Thumbs up Worked like a charm...

I joined this forum specifically to say, "Thank you." Great information. Saved me tons of time and money.
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Old 10-10-2014, 05:49 PM #41
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I may be facing the same issue, but sadly when I test my relay with a volt meter, it works. Apply 12V across the silver leads and continuity across the brass leads. Cycled it a few times, and worked every time. Guess I have to chase things down a bit. Don't have many options on my vehicle such as inverter, so can't easily swap around in the relay block to field test. Other thoughts are welcome.
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Old 10-10-2014, 06:15 PM #42
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Ha! Always confirm tests. So when I set up my rig to test the relay, I had my voltmeter using some old alligator clips that I thought were sketchy. Energizing the relay with a 12V DC bench source, the switch side of the relay went from 1 (open) to 140mV/ohm Figured it was the dicey leads I was using. This is the black relay, btw -- not the beige ones.

For kicks, I swapped out the relay for the front defog in my test rig. Ooooh, 11.4mV/ohm. So popping in the second relay, A/C works fine.

Just goes to show even testing needs to be double-checked.

Bad DNA
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Old 10-10-2014, 07:04 PM #43
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As you can see from my time-stamps, I was motivated to solve this quickly. A trip to Autozone here locally, their part #35874 for $13.99, the identical relay to the one I pulled. Installed it and A/C is once again happy. Thanks for the group think on this -- very nice to have resolution. Now off to replace the failed backlight lamp on the clock side of the instrument center panel.
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Old 03-13-2015, 06:34 PM #44
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Iowa4Runner you are awesome! Thank you so much for sharing your experience for the rest of us on the Forum. I replaced the relay with the new part number, gray casing, and there is a cold air blowing up again on my 2003 4Runner. It cost me $ 82 at the dealer.
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Old 07-17-2015, 01:21 PM #45
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Smile AC Not working and swapping relays

Great idea gentlemen, worked on my 2003 T4R swapped the Dome relay which was the same model # 90987-02022 as the MG-CLT relay and the air conditioning has been working fine. Did not require any clutch adjustment or freon download. Will be replacing the one relay that I know is now bad, however , the dome lights are working with no issues. Thanks for your support!
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