Question about Cars & Trucks
Posted by Anonymous on
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Posted on Jan 02, 2017
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 :
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
Posted on Nov 12, 2009
Testimonial: "Thank you, thank you, thank you it was the 20 amp fuse. The lights now work! "
This is a common problem on 97-00 MY trucks, regardless of the trim level ( XL, XLT, Lariat ).
If you install the fog lamp fuse in the BJB ( aka Battery Junction Box, Engine Compartment fuse panel ) Fuse # 9 ( 15 A fuse ) and jumper the normally open contacts in the fog lamp relay socket ( see diagram below ) the fog lamps should illuminate ( to confirm what you have doing on ).
The problem usually is the main headlamp switch to the BJB is not in place ( this is the yellow wire from the main headlamp switch connector to the relay socket pin #1 ).
One easy route is to make an aux lighting relay & harness, or purchase one online. With this, you can cut the factory ends and attach them to the harness you purchased. There is an air inlet next to where the steering wheel column runs through the firewall. This would give you an easy route to the fog lamp switch. The fog lamp switch, you can buy the factory one, and change the yellow wire from the connector to your added relay, or just add a switch for this function.
This will give you an idea of what the DIY relay and harness would look like.
Hope this helps, more than confuses at this point
Posted on Nov 13, 2009
check to see if you have corrosion in the fuse box or the GEM module, by removing the fuse box completely, disconnect the battery, take out the two screws and two 8mm bolts that hold the fuse box in, it will take some maneuvering to get it positioned right to disconnect the two wiring harnesses from the fuse box, they are bolted through the middle. Once removed, take the GEM module off the back of the fuse box and look for what would be something like the same corrosion you would see on your battery posts, usually one of these components is corroded and causing the problem, my buddy got a replacement fuse box for his from a wrecking yard for only 15 dollars, with all the fuses and relays. If you have this corrosion, then you probably have a windshield leak at the lower left hand corner of the windshield, it lets water drip onto the fuse box and GEM module. Hope this helps, let me know
Posted on Dec 07, 2009
Testimonial: "Mr. Guru, It was the GEM module. Thank you for helping with my problem. "
It is in the owners manual
If you did not get an owners manual with your truck ( purchased used ), you can download one from Ford :
For the 1998 MY truck, I suggest also downloading the 1997 MY owners manual. On page 142 of the 1997 owners manual is a picture of the mini engine fuse panel, which has 2 fuses in it. Every revision of the 1998 owners manual that I have seen, does not include this info, for some reason.
Also, the aux relay box is documented poorly here is a layout of what is in it, and the engine mini fuse panel showing the PCM KAM ( Keep Alive Memory ) and the trailer tow parking lamp fuse.
Might want to do a save as on this, so you have it, in case you need it.
Posted on Dec 11, 2009
Did you check the fuel inertia switch in the passenger side kick panel ?
The fuel pump is powered :
the fuse to the fuel pump relay.
The fuel pump relay to the fuel inertia switch
The fuel inertia switch to the fuel pump itself.
At the fuel inertia switch in the kick panel, power from the relay is the Dark Green w/ Yellow stripe wire and the pink w/ black stripe wire is the power. from the fuel inertia switch to the fuel pump.
If you jumper the fuel pump relay, you should hear it run. If not pull the fuel pump relay, and check the pins in the relay socket, pin 30 should be the power from the fuse.
If you have power at pin #30, jumper the relay socket as shown with the red line above, and check the dark green w/ yellow stripe wire at the fuel inertia switch for power.
Press the button on the top of the fuel inertia switch, and check for power leaving the fuel inertia switch on the pink w/ black stripe wire.
This is tests good, check for power at the fuel pump, same pink w/ black stripe wire.
Fuel inertia switch info is in the owners manual, If you did not get an owners manual with your truck ( purchased used ), you can download one from Ford :
Posted on Jan 03, 2010
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