My wipers and heater fuse blows as soon as I change it only 1998 ford escort
This would mean you have a short in either the wiring or the heater fan or wiper motor. If you have a multi-tester you can disconnect the negative battery terminal and use the OHMs function to test the wires going to the wiper motor or the heater blower. Only 1 wire in each plug connector should be grounded to the car body, not both. If the positive wire is connected to the car body it is a short.
Another way to check at the expense of a few fuses is to leave the power connected and disconnect the wiper motor connector, and insert a fuse in the holder and see if it breaks. If it does not break then it is in the wiper motor or wiring. By unplugging the wiper motor connector you have eliminated the path to the short.
You can do this test as easily by starting with the heater blower. Unplug the connector and then put in a fuse in the holder and if it does not break, the problem is either in the blower motor or the wiring to the blower motor. By unplugging the blower fan you have eliminated the path to the short.
Now you do not have to sacrifice a fuse each time if the multi-tester is set for 12volts instead of OHMs and you use the leads on the clips that hold the fuse. But multi-testers usually do not have alligator clips and you would need to
hold the test leads to the fuse holder.
On some models there is a blower motor resistor between the power source and the heater blower. Usually they do not short like you are experiencing. You could have a wiper switch malfunction in the steering column, which could also go away each time you disconnect the wiper motor.
Hope this helps
Mar 04, 2018 |
Ford Cars & Trucks