Theory behind the FEM and REM - Ford Forum - Enthusiast Forums for Ford Owners


Windstar/Aerostar The beginning of the minivan for Ford.

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Old 05-14-2018, 06:12 PM
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Default Theory behind the FEM and REM

On my 1999 Windstar, I've been curious to know what is the main purpose of the FEM and REM and how they work in relation to the wiring system in this minivan. I had a 1998 Windstar cargo van and I never had the electrical problems with it like I'm having with the 1999.

Also, has anyone ever heard of anyone building or designing some way to bypass these units to eliminate one source of electrical issues with these vans?
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Old 05-15-2018, 03:52 AM
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The general idea was to eliminate yards of wiring and expense at the time of build. So now the expense is on the customer. Certain functions have been designated to the modules instead of the usual hard wiring.
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Old 05-15-2018, 10:25 PM
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If that is so, has anyone experimented with finding a way to bypass those modules?

And hanky, what functions are controlled or monitored by them?
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Old 05-16-2018, 02:53 PM
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If you have a concern I could tell you which module controls that because the list is somewhat long.
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