I have a 99 Z28. AC won't work. Compressor clutch not engage. I jumped the relay out and it works. Relay is good. Is the only thing going to the relay the console controls? They seem to be working, turn it to hot and it gets hot. Any help?
by 
tass316
ANSWERS: 2
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sounds like you are low on freon, you also have a high pressure limit & low pressure cutout switch - do NOT run with them bypassed very dangerous. any shop or most stores and test this for you
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Ok Dude, here's the deal on Relays. The switch turns on the Electro-magnet & closes the "High Power Contacts" ONLY!!! U still need a heavy "Power Wire" to supply one of the 2 "Contacts". This "Power Source" is then connected to the "Clutch" when the "Dash Switch" activates the "Relay Contacts". If U get "Power at the "Clutch", this is all working correctly. The Relay has 2 parts & one part can work & not the other! Remember the "Points" often "Burn" & U get no "Power" out of it. Check to see if U have "Power In" to "Switching Contacts"(not just "Relay Coil")& then "Power Out" to clutch. The "Power In" is often controlled by another "Sensor" used for "Low Freon" to keep U from "Burning things up, & it may be this that is not giving U "Power In". Look this all up on the "Wiring Diagram". John
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