big_jay239b16A

I have a 95 civic with a b16 swap my cooling fan wont turn on. replaced the relay in it, the fuses are fine. the radiator and fan are new. Any ideas on what i should do?

Former User

Jump the unplugged fan switch connector. Turn key to ON(II). Does fan run?

big_jay239b16A

fan turns on when i jump it to the battery. Im guessing that the coolant isn't flowing correctly.

Former User

Your answer is nice, but it's doesn't address my question.

big_jay239b16A

no the fan does not turn on when I jump it the way you said to.

Former User

Oh, I get it. You ask questions and also answer them.

Test the fuse and relay.

big_jay239b16A

Fuse is good and I Just bought a new relay.

Former User

Voltage test both fan fuses. I assume you know which fuses to test as you have already concluded they're good.

Test whether both sides of the relay get voltage.

Test whether voltage reaches the Yel/Grn wire terminal of the fan switch connector.

Post the results.

big_jay239b16A

Yes I do know. OK ill let you know in a bit.

big_jay239b16A

Okay the relay relay is reading 11.38-11.40. But the connector doesn't read anything. Not the fan sensor, but the side that it connects into.

Former User

2 of the 4 terminals in the relay socket of the hood fuse box should have battery voltage with the key in ON(II). Apparently only one does?

Which 2 fuses have you tested for voltage? Click the Test Fuses link in my signature.

Does the connector for fan switch get voltage on the wire I mentioned?

big_jay239b16A

Okay when i tested the connector I didn't get a reading at all? The left side of the relay is the side that doesn't read. the right side does. The wires you mentioned are they in the bigger sized connector that's shown in the diagram? or are you talking about the connector that plugs into the fan?

Former User

Was the key in ON(II) for this^ voltage test? If so, one of the two fan relay fuses may be blown.

big_jay239b16A

Yes the the key was on for the testing. And were are the fan relay fuses located?

big_jay239b16A

I thought that the there was only the two power supplies for the fan? the relay and the fuse?

Former User

A relay is just a switch that generally (not always) uses two power sources via two fuses, in this case dash fuse 13 and hood fuse 33.

big_jay239b16A

Oay well its not the fuse under the dash.