Checked all fuses, and relays, all are working correctly. have power going to switches. but windows dont work and interior lights dont work.
All the things you mentioned are controlled by a central computer control module commonly called the BCM (body control module). When a problem occurs you must have the dealer or a shop with the right type of system scanner read the BSM and have it do an "Active " test, it (BCM) then will operate the windows and other things it controls and return a fault code for what it sees wrong in the systems it controls, This test is essential to have a starting point to diagnose the problems you have.
SOURCE: power windows went out
The power window system operates under the control of the accessory delay relay. For early build vehicles, the GEM will energize the relay to provide power to the power window system. For late build vehicles, the ICM(instrument cluster module) will energize the relay to provide power to the power window system.
Now it does not state the build date cut off in shop manual. So if it is an early build Fuse No.6(60amp) in Battery junction box feeds a circuit breaker that mounts under the hood on the fender apron at the firewall on driver's side(wire colors will be BK/WH and YE/LG).Then it feeds the switch side of the accessory delay relay in the Central junction box. Fuse 17(15amp) in the central junction box feeds the switch side of this relay.
The late build system is the same except instead of the circuit breaker on the left fender apron it uses fuse no. 47(30amp) in the battery junction box.
Now you can go to this website and pick owner guide on left task bar,input your vehicle info and pick get owner guide. Then pick the 6th owner guide printing and go to page 210 for the accessory delay relay location. You will see all the fuse information starts on page 207 thur 216.
SOURCE: 2001 Mercury Mountaineer keeps blowing the PCM power diode (fuse #19)
Check all of the battery terminals and cables and check the wires on the starter/selonoid, start from the battery and follow the cable out and check all conections , clean and tighten them and if it still does it the starter/selonoid is bad and needs replacement...
SOURCE: 2002 mercury mountaineer 4.0 starter relay location
The power distribution box is
located in the engine compartment.
The power distribution box contains
high-current fuses that protect your
vehicle’s main electrical systems
from overloads.
The starter relay is in position #56 of that box.
SOURCE: 02 mountaineer, none of the windows go down
you could check the belt for the windows inside the door or see if it is jambed!!
SOURCE: None of my power windows on 1998 Mercury
If you checked the fuses and they are fine, try this. With the key on and the window button down or up, open and close the door holding in the up or down position. If the window moves, there is a wire(s) are broken in the wire harness that goes from the door jam to the door. This is a common problem that we find with window and door operating problems. You may find 1 bad or broken wire, or 4-5 broken wires. Let us know if this help you find a repair, for this concern. Craig
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