Just bought the car so starting from square one, the owner said everything was working fine before. The fan wouldn't start either by the temp sensor or the overide switch, jumpered the relay and the fan motor runs. Power at circuit breaker and terminal 87 at the relay, replaced the relay to be safe. Put a ground to the trigger wire at the relay and fan now runs when you turn on the toggle switch and shuts off. Still can't get the fan to operate off the sensor, gets up to 210 and not engaging. Tried grounding out the sensor terminal to the body of the sensor, no luck. Looking for idea's to fix the problem.
ground out the sensor wire to chassis, fan should come on, id not, the wire is broken between sensor & relay. What temp sensor do you have?? The one on the 52 is a 200 Deg. but doesn't kick in till around 215 or higher [by the guage]
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I can only please one person a day, Today is not your day!!Tomorrow doesn't look good either !!!!
Ran a new sensor wire from the trigger wire on the relay and grounded out, no fan. Thinking the sensor didn't have continuity, also ran a ground from the sensor lug to ground. Sensor should be on at 185, so at 210 it should be on.
Would you post how the trigger wire to relay is wired and where the ground side of the trigger wire goes. Does your sensor have one or two lugs?
Mine are wired as follows, the main power is through fuses from the battery, to the relay then to the fan + and then the fan - to a good ground. The trigger is from the ign to the relay coil and then to the sensor. One fan has a switch in parallel with the sensor that goes to ground. Hope this helps.
If the fan is working when you use the switch, then i would say that the relay is working, so "Me thinks" maybe the sensor is "KUFUT" ????? I used the same grnd. wire for switch & sensor, just wired in a bypass grnd. so switch would kick in the fan!!!
-- Edited by dualquadpete on Thursday 11th of October 2012 05:48:45 PM
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I can only please one person a day, Today is not your day!!Tomorrow doesn't look good either !!!!
Henry, Sensor is a single lug so I'm assuming ground is made when the switch closes.Relay is wired with hot lead to #30, sensor trigger off #85 back to the sensor in the head, switched power to #86 comes direct from the fuse panel, actually has a separate circuit for the cooling fan, when the circuit on the relay is energized #87 is powered up to fan
Problem solved, PO used the switched 12v to the relay(coil activation) for the toggle switch, rather than the ground from the sensor. Rewired the way you suggested Pete and works perfect now. Thanks, Don
Problem solved, PO used the switched 12v to the relay(coil activation) for the toggle switch, rather than the ground from the sensor. Rewired the way you suggested Pete and works perfect now. Thanks, Don
I;ll look for the "cheque" or "money order" in the "MAIL" I Know it might take some time to get here, but I'll keep "looking" Glad it helped you Pete
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I can only please one person a day, Today is not your day!!Tomorrow doesn't look good either !!!!
