[Shrewz92]

Originally Posted by mpumas

I re-checked the drawings and switch B is located on the upper hose housing where the hose that comes from the radiator connects to the engine. They all input into the coooling fan timing unit. . Switch A should close at 184F and switch B should close at 226F. So if switch B is shorted or closed at a temp lower then 226F or the temp is above 226F, it would cause both fans to run. I would pull the switch B plug and see what happens. You can also pull the sensor and temperature test it. Or check the wiring. The blu (switch A) and/or wht/grn (switch B) may be shorted to ground. If the temp switches and wiring are good, then the problem may be with the cooling timer unit.

Thanks. So, to understand locations correctly: Switch A would be down low on radiator bottom, switch B would be up top close to the thermostat. Where'll I find that cooling fan timing unit? Is it in an accessible location? I'm not familiar with what it looks like, nor where it is. Two nights ago, after the suggestion of pulling the plugs, I pulled the plug on the switch B, but the fans continued to run. I didn't know location of Switch A. I've not taken a multi-tester to the wiring nor the switches. Would simple continuity tester work on testing the circuitry?