Trying to learn about relays

Hi, I’m new to the site. I need help trying to learn about relays. I have real bad dyslexia all my life and very hard to learn something. Even writing this I will leave out few words and spelling, spell checker has melt down trying to figure what I’m trying to spell, that just a small part of my dyslexia.

So here it goes. On this site I have readied the stuff about relays and on how to test them using the numbers on the bottom of the relay, like 30 with 87. My car relays have no numbers on the bottoms.

I have a 2003 Pontica Vibe 1.8 all wheel drive, 175.000 miles on it. The a/c was acting up, when the car was cold the a/c would work, but the car got hot from driving and shut off the car and start it up after 15 minutes the a/c would not work. You hear the rpms go up and fan comes when you push the a/c button on, but no clutch spinning, I check the allen nut on the clutch face and it is tight. This went on for a week. Now when you press the a/c button nothings works. No higher rpms, fan doesn’t turn on, and no clutch spinning, when the car is cold.

What I have readied on this site that relays can get hot and cause problems, and I’m pretty sure it a relay problem.

The fan does come on for water temperature. I have a test meter, with cheat sheets.

Relays.

FAN No.1, Toyota Denso, 90084-98031 TN 156700-1027 12v on the back 8.D-20 4 prong

FAN No. 2, Toyota Denso, 90084-98032 TN 156700- 1062 12v on the back 9.D-5 5 prong

M/G CLT, Toyota Denso, 90987-02022 15600-2470 12v 4 prong

None of these have numbers by the prongs.

How can I test the relays.

How can I check for power to a/c clutch.

How can I hot wire with the relays out to see if the clutch come on and if the fan come on and rpms go up.

I need the a/c to work, I have a bad heart and it hot and humid, I have no money to have it check out and fix. Any help will be great.

Thanks for your help. The battery test was good, only 6 months old. Alternator check fine. When this first started with a/c, I took it to garage and the freon was tested fine and no leaks. But the car was hot and they said there was no power to the clutch and wanted $550 to fix it. Can’t afford it but the next day when the car was cold the ac work find, and that went on for over a week. When the car was hot only the fan would turn on and rpms went up and no clutch, but I lost that now even when the car is cold now. The fan will come on when the water temperature get hot.

I check all the fuses twice and replace them anyway, and there was no crash damage to the car ever.

Thanks for your help, will try your suggests.

Thanks for the help. My wife is very sick and I haven’t had a chance to try your suggests yet, I will try tomorrow.

So now when you turn the AC on from the control head you don't get the A/C or HighSpeed fan or engine RPM increase regardless of engine temperature? That’s correct.

I have manul control knob and turn to the coldness setting.

Thank-you very much for your help. I will let you know what happens.

There was only one black & white wire running to top of the compressor to a connecter that I can’t reach. Is this power or ground. Is there away to jump the compressor in the junction box.