Question about 1997 Chrysler Town & Country
All fuses check ok. turn on a/c and the fan that controls the air flow to the condersor doesnt come on either
It has a switch(two wires coming out) or sender(on wire coming out) near the thermostat housing when the coolant reaches a certain temperature the sender grounds itself and this turns on the relays for the fan. How to check with a continuity tester when the engine is cold disconnect the connector right at the sender then put a test lead on a ground near the sender and the other lead at the end of the sender it should read OL(overload) or open when the engine is hot the reading should be zero (circuit is closed) or viceversa depending on the type of relay because some relays are normally open and some are normally closed. With the switch do same measurement except that you don't connect one end of the test lead to the ground remember the switch has two wire one lead in wire and the other test lead in the other should read open(or no measurement) when cold and zero when hot meaning circuit is closed
Posted on Jul 24, 2009
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Posted on Jan 02, 2017
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Trouble Code: P1491 You PCM does not sense current to radiator fan when it turns it on. Is the fan coming on or not? Usually not when you have this code. Problem can be with the fuse, relay, wiring or fan itself. First check the fuse. If good, next try swapping the relay with another one in the engine compartment relay box, such as the horn relay.
Let the car warm up and see if the fan will come on. If yes, get a new relay. If not, either use a test light to see if there is voltage at the fan connector when the engine is on and hot, or else test the fan motor by hotwiring it to the battery. If none of this works, please get back to me for how to troubleshoot the wiring.
Radiator Fan Control Relay Circuit Malfunction
Radiator fan control relay circuit is open or shorted to ground Radiator fan control relay circuit is open (test power to IGN) Radiator fan control relay is damaged or has failed PCM has failed
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