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The relays are coded as follows:
Relay location
Description
1
Interior lamps
2
Open
3
Roof marker lamps
4
Battery saver
Engine compartment relay module
The engine compartment relay module is located in one of two places
depending on which type of engine your vehicle is equipped with:
•
Gasoline engine: driver side of the engine compartment above the
brake master cylinder.
•
Diesel engine: passenger side of the engine compartment behind the
power distribution box.
Have a certified technician or your dealer service this module, if
required.
The relays are coded as follows:
Relay location
Description
1
Trailer tow left turn
2
A/C control
3
PCM back-up lamp
4
Trailer tow right turn
2004 Econoline
(eco)
Owners Guide (post-2002-fmt)
USA English
(fus)
Roadside Emergencies
150