Fiero power window express down mod correction.
After several attempts to complete he window express down mod as listed in the newsletter and not being able to get it to work, I decided to find out what was going on. I found that the Ford uses a power window switch that grounds both window wires when it is in the off position while the Fiero leaves these wires open. After some head scratching I figured out how to make everything work using two 5 prong relays I bought at Bumper to Bumper Auto for 5 bucks each. I have added a diagram to show the new wiring for the express module and the relays.
Notice that the wire from the window motor up terminal (Brown) and from terminal 4 (yellow wire) on the express relay go to the normally closed terminal on relay one
The wire from the window motor down terminal (Blue) goes to on the express relay terminal 1 (red wire)
Express relay terminal 5 (black wire) goes to the normally closed terminal on relay two
The wires from the switch up (Brown) go to the normally open and to one of the coil terminals on relay one
The wires from the switch down (Blue) go to the normally open and to one of the coil terminals on relay two
The common terminal goes to ground and to the other coil terminal on both relays one and two.
The wire from terminal 3 on the express relay goes to power with key on
Fiero power window express down mod
A little information about the module used for this mod:
To the best of my knowledge and experience in the junkyard, these modules were only used in generation 2
Taurus/Sable and Explorer vehicles. They can be found inside the driver door skin, mounted underneath the armrest
support. The Ford part number for the module is: F2DB-14B118-AB. I have heard that the dealer price for these
modules is around $50, but if you grab a handful of them and tell the junkyard guy that they’re just window relays,
you’ll get better treatment. If you’re cutting it out of a junkyard car, of course you want to get as much of the harness
wiring as possible.
And now for the installation information:
There are five wires coming off of the express down module. They are as follows:
1 Motor side of down wire (red)
2 Switch side of down wire (white/black)
3 – +12V (blue/black)
4 Up wire (yellow)
5 Ground (black)
If you remove the module from the harness connector, you will be able to see the numbers stamped into the plastic.
For the switch to which you want to connect the module, use a meter or test light to identify:
- Keyed +12V wire
- Ground wire
- The wire that goes to +12V when you press up
- The wire that goes to +12V when you press down
Here are the connections that must now be made:
Use an inline spice to connect module #3 to the keyed +12V source.
Use an inline splice to connect module #4 to the up wire
Use an inline splice to connect module #5 to the ground
Cut the down wire, leaving you enough room to butt splice each end. Connect module #1 to the electric motor side of
this wire. Connect module #2 to the switch side of this wire.
At this point, all of the electrical connections have been made. All that is left to you is to reassemble everything and
fasten the module so that it doesn’t rattle.