When you turn on the A/C compressor, does the radiator fan kick on automatically? To test the radiator fan which plug from to relay do you connect directly to a 12V source? Left, right or middle? What number goes to what battery terminal? (+ or -) Read this on another form post and wanted some clarification.
https://volvoforums.com/forum/volvo-...n-relay-14822/

 

Yes, radiator fan should turn on when a/c is on.

No, you do not connect a 12v to the relay to test the fan. That is a two speed fan relay, you connect to either 2 - in or 1 - in to a ground, that would turn the fan on high speed or low speed.

30 is the 12v source , 2 - out and 1 - out both goes to the fan for high or slow speed.

I'm not sure which wire is which speed.

If you want to bypass the relay, undo the red/green plug, get a thick 10 gauge wire and use it to connect from a 12 v source to either red/green wire that connects to the fan.

 

The radiator fan does not kick on when the A/C Compressor is on. The A/C still blows cold consistently. Would that point to a bad relay? Step by step directions to manually test the fan? (Tools available, continuity tester, basic multimeter, gator clams & wires)

 

Testing procedure already given, those two test the relay and fan motor.

 

Engine Cooling Fan Control Switch Relay Module for Volvo C70 S70 V70 S90 V90 | eBay

https://www.rockauto.com/en/moreinfo...851&cc=1433981

In case it is just the relay, these would both be valid replacements, correct? 2.4L Base sedan (I have only a very rough understanding of what I'm doing)

 

Yes, relay is on top of the radiator.

 

When I was replacing the coolant and thermostat, I noticed a second relay under the splash guard on the drivers side in front of the right wheel, near the radiator petcock. It was also labeled as a fan relay. Any input as to the purpose of this? A/C relay or something different?

 

Doesn't sounds like a factory setup, but then it would help to know what we're working on here since a 1996 C30 does not exist.

 

1996 850 Base model Sedan (wouldn't let me set it to anything else and the garage bugs out on me)

 

Pictures would help. Have you tested the relay in your links yet?

 

Fixed the garage post (had to delete and re-upload) I'm awaiting delivery for a multimeter to make testing the relay easier & more accurate.