There are a few fuses for the trailer tow adapter.
1st, is theodd location on the 97-98, engine mini fuse panel has a 20 A fuse forthe stop / turn lamps. Have seen it covered in tape from the factory onsome 97-98 MY trucks.
This is on page 142 in the owners 1997 manual, all the revisions for the 1998 owners manual I have seen do not include this fuse box for some reason.
Download a PDF version from Ford, for the 1997 MY at :
https://www.fleet.ford.com/maintenance/owners_manuals/default.asp
This is a picture of the Power Distribution Box, additional relay box and engine mini fuse panel with the covers off. The 20A in the upper right panel with the red base, is the trailer stop/turn fuse.
The others :
1. Power Distribution Panel / engine compartment fuse panel
Fuse #1 - Trailer tow back-up and tail lamps
Fuse #16 - Trailer tow battery charge and stop/turn lamps
Fuse #28 - Trailer tow electronic brake
2. Instrument Panel Fuses ( cab fuse panel by hood release )
#23 - trailer tow battery charge relay
now solved. was fuse 21 in engine fuse block.
Thanks, found the fuse under the hood. Was only labeled 'Horn' in the manual so wasn't very clear.
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