Question about Ford Focus
This can be due to a stuck Relay. The Dealer has machine which fits the harness plugs and checks whether electric current is flowing when it should be shut off.
Sometimes you can do a basic test yourself. A multitester is used to monitor whether everything is shut off. It is tricky because you can burn out the tester if you have it set for Ohms and get Voltage instead.
There are several "stay alive" circuits and unless the Antitheft, Brain, and clock are unplugged you will show current Voltage with the key off. Disconnecting both battery cables from the battery will allow you to safely measure connections.
What you are trying to do with the Ohmmeter is find where the Negative and Positive cables intersect. With the "stay alive" items disconnected, ALL Negative wires are separate from ALL Positive wires, KEY OFF.
Your short is the remaining item that is making a connection. Under these conditions, temporarily removing a relay, or a fuse, one by one, will break the connection and reveal the problem wire or the wire leading to the bad part.
Do not mix up the fuses. Hopefully you will only have 1 problem.
Posted on May 02, 2013
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Posted on Jan 02, 2017
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