1996 Accord EX 4 Cyl. Engine overheating as radiator fan doesn't come on. Condenser fan works.
Fuse good. Swapped relays no diff. Powered fan straight from battery and it works fine. Upper rad hose gets hot after engine warms up. Jumpered the cable that plugs into the temp sensor and when I turn on AC both fans run. Thus I think it is temp sensor but my friend says there is a switch on the rad and the engine and one is bad. I can't find any switch on the rad and have no manual. Am I right that it is temp sensor or is it a fan switch and if so can I test the switch and where is it? Thanks!

 

Temp sensor it is. I don't think your buddy knows what he's talking about. There's no sensor on the radiator. You indirectly tested the whole circuit, and it worked. That only tells you one thing, and it is the temp sensor.

 

Thanks, just realized I put this as an Accord but it is a Civic, (bro'n'law's car) ... but I am expecting all is the same.
It was supposed to be a switch on the bottom of the rad and I know some cars have 'em but doubted myself as wondered why my jumpering temp sender had anything to do with AC circuit closure.
Thanks!