Whenever it rains the engine light comes on my Dodge Grand Caravan and
sometimes the radiator fans continue to run after I turn off the engine.
They (2 fans) will run until the battery is dead. It never happens when it
is not raining. I swapped a couple of the relays around and the problem did
not show up again. Yet a couple of days ago the engine lite came back on
coming back to Dallas from East Texas in heavy rain. This time the radiator
fans did not continue to spin and run down the battery when I turned the
engine off, yet by the time I got home it was not raining. I took the Van to
AutoZone and they read the computer code for me. They did not know what it
means. In a previous post I was told it was the radiator relay under the
aircleaner box but I cannot see any relays underneath there. All the relays
appear to be beside the battery and a few under the dash, yet there is
nothing labeled radiator fans in the bank of relays. Searching
https://www.rockauto.com I did find some relays that almost look like the
ones in the relay bank next to the battery. But what caught my attention
was the one that looks like:
it is labeled "engine cooling fan relay":
I am wondering if this is mounted on the chassis somewhere, maybe under the
air filter box as I was told earlier. I have 2 questions:
1. Does the "engine cooling fan relay" mount on the chassis and if so where
is it located, can I see it without removing the air filter box.
2. What does the code below indicate is wrong.
This is what the Autozone ticket says:
TroubleCode OBDII (Alpha) P code
P1491 Secondary Switch Solenoid Circuit Mulfunction
Any ideas? Thanks in Advance...
john (dot) behneman (at) gmail (dot) com
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