I wanted to try and get some other opinions on what could be going on with my cooling fans...
Two weeks ago I was driving the car and I barely noticed the temp gage skyrocketing in time to pull over and spray coolant all over the place and overheat like crazy. After cooling down and re-filling I realized that my fans were not coming on (dual electric LT1 stock fans). I also noticed that the fan relay socket was melted slightly.
This past weekend I replaced the wiring down near the fans and the connectors that plug into the fans (previously my wiring had not been weatherproof as I had forgone the proper connectors. Some of the terminals had burning evident, however both fans still work great with power.
I replaced the relay, checked that my power and ground wires were properly connected and healthy, and tested everything out. No luck.
The PCM would not ground the relay no matter what temp the sensor provided, with the temp sensor unplugged, with the ALDL pins jumped, etc.
(for reference, i have both fans on one relay set to come on at around 200 F off of the low temp pin A11 red pcm connector)
So thinking I was clever I reflashed my PCM to control the fans from pin A12, the secondary fan pin for high temp/speed. Now, the fans come on with ignition power, AKA the PCM is constantly grounding that pin.
My best guess is that during whatever current/voltage event melted my relay socket, I managed to fry the circuit in my PCM that handles pins A11 and A12, and they are now permanently open (A11) and grounded (A12).
Any other ideas? As it sits now my fans run as soon as the key is turned, which beats no fans, but still isn't ideal. I am considering installing a manual switch to control the relay.
~Steven
Two weeks ago I was driving the car and I barely noticed the temp gage skyrocketing in time to pull over and spray coolant all over the place and overheat like crazy. After cooling down and re-filling I realized that my fans were not coming on (dual electric LT1 stock fans). I also noticed that the fan relay socket was melted slightly.
This past weekend I replaced the wiring down near the fans and the connectors that plug into the fans (previously my wiring had not been weatherproof as I had forgone the proper connectors. Some of the terminals had burning evident, however both fans still work great with power.
I replaced the relay, checked that my power and ground wires were properly connected and healthy, and tested everything out. No luck.
The PCM would not ground the relay no matter what temp the sensor provided, with the temp sensor unplugged, with the ALDL pins jumped, etc.
(for reference, i have both fans on one relay set to come on at around 200 F off of the low temp pin A11 red pcm connector)
So thinking I was clever I reflashed my PCM to control the fans from pin A12, the secondary fan pin for high temp/speed. Now, the fans come on with ignition power, AKA the PCM is constantly grounding that pin.
My best guess is that during whatever current/voltage event melted my relay socket, I managed to fry the circuit in my PCM that handles pins A11 and A12, and they are now permanently open (A11) and grounded (A12).
Any other ideas? As it sits now my fans run as soon as the key is turned, which beats no fans, but still isn't ideal. I am considering installing a manual switch to control the relay.
~Steven