Take it out. Tap it on a solid surface a few times and stick it back in. If it works it is the relay, no matter what part number you have.

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04 4x2 Black SR5 V-6, PP 5W-20 Engine, M1 75W-90 Rearend, OEM V-8 Oil Filter, K&N FIPK, NGK Iridium IX Plugs, Scion T1807 HU w/ AUX input cable, Toyota All-Weather mats, Valor Exhaust Tip, Front Windows 35%, Silverstars.

08 4x4 Salsa Red SE V-6, PP 5W-20, OEM V-8 Oil Filter, K&N Air Filter, Optima 34R Redtop, Toyota All-Weather Mats, Valor Exhaust tip, Front Windows 35%, Silverstars & MTECs, Carbon filter removed, Daystar 2.5/1.5" Lift, 265/70 Revo 2s, SpiderTrax.

The a/c light is blinking on my 2003 4runner as well. I just called the dealership and was informed that if I do need to replace the magnetic relay switch, the repairs would cost up to $1100 since it's no longer under warranty . That seems quite unreasonable! Are they serious??

Check out this thread. Order the relay mentioned on page 6 from Digikey. I ordered 2. Less than $15 shipped. Arrived in less than a week. I broke off the center of 3 pins. It works perfect!!! Sure beats $1100!!! You can also try the tap on a hard surface trick. Mine lasted over 10 months longer that way. If it works it is the relay only. If it doesn't still replace the relay. You will only be out less than $10.

A/C light flashing??

See pic with pin broken off.

Attached Images

 

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04 4x2 Black SR5 V-6, PP 5W-20 Engine, M1 75W-90 Rearend, OEM V-8 Oil Filter, K&N FIPK, NGK Iridium IX Plugs, Scion T1807 HU w/ AUX input cable, Toyota All-Weather mats, Valor Exhaust Tip, Front Windows 35%, Silverstars.

08 4x4 Salsa Red SE V-6, PP 5W-20, OEM V-8 Oil Filter, K&N Air Filter, Optima 34R Redtop, Toyota All-Weather Mats, Valor Exhaust tip, Front Windows 35%, Silverstars & MTECs, Carbon filter removed, Daystar 2.5/1.5" Lift, 265/70 Revo 2s, SpiderTrax.