i have changed the water pump thermastat,heat sencer,heat sending unit

Asked by Jun 02, 2015 at 07:53 AM about the 1997 Ford Thunderbird LX

Question type: Maintenance & Repair

could you please send me a link for a electrical diagram and a lable for fuses under hood it has just one relay ive changed every sencer on the cooling systym and the electric fan will not come on ive got the fan direct to battery and it still overheats

2 Answers

38,285

If you have the cooling fan on at all times and it still over heats, you have a bigger problem. I would go to the auto store and buy a block tester. It's just a plastic tube with a chemical that you add. This way you can rule out a bad head gasket. Plenty of videos on youtube on how to do the block test. Is you system pressurizing? Are your hoses hard when hot? If not, replace radiator cap. Next I would buy an air bleed kit to make sure that there isn't a large air pocket in the system. If it still overheats, your radiator must be plugged with rust. You have pretty much changed out everything else.

5,085

This is not a link to a wiring diagram, but I think you have more than an electrical problem. Since you say the fan is running all the time, I think you have cooling problems. The car is 18 years old. There is a good chance that you need to have your radiator rodded out (overhauled) and flush the block until clean water comes out. Then when done with both of those install a new thermostat, refill the radiator with the proper ratio antifreeze. Get your fan to work properly and that should take care of the problem.

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