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1995 Ford Contour, The cooling fan only work when

Sent to Car Experts June 15 2006 at 3:05 PM
   

1995 Ford Contour, The cooling fan only work when the A/C is on, I did change the sensor for the fan also my A/C does not work very well when I stop at a light due to RPM seems to go way down, I don't know how to bring up the RPM other then step on the gas to bring it up, which is dangerous.
Please help, Thanks, Mike Jorgensen

 

Optional Information:
1995 Ford contour 2.1 L

Already Tried:
replaced sensor/p>

Customer (name blocked for privacy)
Status:  Closed   Value: $15
Info Request
June 15 2006 at 4:24 PM (1 hour and 19 minutes and 46 seconds later)
         
REPLIED to Info RequestCheck Mark
How many fans does yours have? Do you have an automatic or manal transmission? Are you sure you changed the coolant sensor for the computer or the sending unit for the temp. gauge or light?
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32dmadden -- Auto Repair Shop Owner -- 97% Positive Feedback on 430 Car Accepts
A.S.E. Certified Master Technician 32 yrs. Auto Repair Experience
Reply
June 15 2006 at 6:52 PM (2 hours and 27 minutes and 21 seconds later)
         
Reply to 32dmadden's Post: I have one fan

the book says engine coolant temp ECT sensor is what I changed if there is another I don't know about it

automatic tran.
Customer (name blocked for privacy)
Answer
June 15 2006 at 9:19 PM (2 hours and 27 minutes and 15 seconds later)
         
ACCEPTEDCheck Mark

Ok That was the correct sensor. The reason it works with A/C on is it has a seperate high speed relay that the a/c controls. Go to the cooling fan relay. The green /yellow wire comes from the relay & go to the fan. that's pin 5 on the relay. The red wire comes out of auxiliary fusebox and goes to pin 3 at the relay. The green/blue wire comes from the computer and goes to pin 1. It should have 12v with the key on. The black wire comes from ground and goes to pin 7 at the relay. The black /blue wire comes from the computer and goes to pin 6 at the relay. It provides a ground to complete the control circuit. When the temp. sensor reaches around 107C the computer completes circuit to ground at pin 6 Check all the voltages at the relay. Pin 1 12v key on, Pin 7 goes to ground, pin 6 goes to ground when temp. is over 107C. Pin 5 12v, pin 3 12v when fan commanded on. A simple test is jump pin 6 to ground at the relay. THE FAN SHOULD COME ON. Hope this helps out. Please accept my answer if you are satisfied Thanks 32dmadden

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32dmadden -- Auto Repair Shop Owner -- 97% Positive Feedback on 430 Car Accepts
A.S.E. Certified Master Technician 32 yrs. Auto Repair Experience
Reply
June 16 2006 at 10:56 AM (13 hours and 37 minutes and 17 seconds later)
         
Reply to 32dmadden's Post: This was a good answer and it helped me fix my problem I found some bare wires at the sensor and the relay seemed to be loose, anyway it works now, but gauge reads abit hi when the fan comes on.

Thank you, I have accepted the answer and if you can help me through the problem I mentioned in the original text it will be worth another $15

Mike
Customer (name blocked for privacy)
Answer
June 16 2006 at 4:42 PM (5 hours and 45 minutes and 39 seconds later)
         
ACCEPTEDCheck Mark
For the low RPM I would try a fuel system cleaning. This includes the throttle body, fuel injectors, fuel filter(if it hasn't been replaced lately). Also the idle air control motor & system need to be checked out. And cleaned. And of course the ignition (plugs, wires, coils, module). Most of the time the ignition problems will give a missing condition, but some times it just won't spark at all leaving a dead or not running cyl. Sometimes just at idle, as RPMs rise it will start firing again. Check and make sure you don't have a dead cyl. at idle. Well that's all I can think of now. Let me know if you need any thing else. Thanks 32dmadden
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32dmadden -- Auto Repair Shop Owner -- 97% Positive Feedback on 430 Car Accepts
A.S.E. Certified Master Technician 32 yrs. Auto Repair Experience
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