Cooler fans wont stay on. OVERHEATS HELP

[dunemaster28]

My issue is my fans wont turn on. I replaced the relays in the fuse box that did not work. I took the relay cap off the low fan relay and noticed it wasnt closing the connection all the way. Im read that this happens when there is not enough power to close the switch? So this means i might have an exposed wire somewhere grounding out? Does anyone have any insight to this? Or does anyone know what color the wire is from the fuse box so maybe i can try and trace this wire down and find the issue. So far i havent been able to find much. Thank you

[rjgti]

check the temp sesor

[dunemaster28]

Temp sensor is good ran a computer check on it.

[rjgti]

what voltage is at the fan

[dunemaster28]

If I remember correctly the voltage wasn't making it to the fans to turn on because the relay wasn't getting enough power to close the relay itself. But when I closed the relay manually with a test meter the fans turned on obviously cuz I closed the relays manually. Does that mean the relay isn't getting enough power to close and turn the fans on?

[rjgti]

I would then look at the 12v control line, it should always be 12v, not sure if it is the ecm or bcm that supply the gnd for that relay for your truck. I will look for the schematic for your truck

Edited July 21, 2016 by rjgti

[xranger90]

Run down the wire to see any exposed wiring that is connecting to ground. A buddy here had the same issue due to a stick managed to peel a wire.