Car overheating, fans not coming on
#1
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Car overheating, fans not coming on
So I got home from the store last night and heard a loud gurgling from the engine bay after shutting my car off. I looked at the gauge and it was overheated (probably boiled off 8-12oz of coolant). I promptly put a box fan over the engine on high to cool down the engine, the car idles fine so I don't think I broke anything however I noticed my cooling fans aren't coming on. At the moment I have both stock fans wired in parallel, starting the A/C fan when the driver-side cooling fan comes on.
I pulled the Diagnostic box and bridged Ground and TFAN to test the relay, and it clicked no issue. The fans didn't come on, however. I applied power to the fans and they both spun up. Beyond this I didn't have much time to troubleshoot, however these were working fine just the other day.
Any suggestions? Could it be the multi-wire sensor on the back by the tstat? I already replaced the single-lead cluster gauge sensor.
Sensor in question:
I pulled the Diagnostic box and bridged Ground and TFAN to test the relay, and it clicked no issue. The fans didn't come on, however. I applied power to the fans and they both spun up. Beyond this I didn't have much time to troubleshoot, however these were working fine just the other day.
Any suggestions? Could it be the multi-wire sensor on the back by the tstat? I already replaced the single-lead cluster gauge sensor.
Sensor in question:
#4
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ECU reports a valid temperature reading, Relay clicks when I ground TFAN and the fuse is intact. Fans run when given direct power.. I'm at a loss. I even tried dropping my fan turn on temp to 100*F to see if they would click on. Nothing.
#5
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Update (requested via PM) - Issue was a bad ground under the brake booster. Cleaned all of the spade connectors and re-mounted it to the stud under the fender lip on the fender wall where there is a box mounted (strap will share this boxes bracket mounting stud) behind the intake snorkel shown in this picture.
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