My 1998 F150 has a factory wired harness for the tail lights but I am getting no brake lights or turn signals at rear plug. I do have tail lights and a good ground. I have checked all the fuses under the dash and under the hood on the left side. In the fuse box under the hood there are some weird little black things that I think are diodes.
Help me figure this one out and I will be

 

Check fuse F2 (20 A) in the mini-box under the hood.

 

Where is the mini-box under the hood? I have a large box located on the inner fender on the drivers side near the master cylinder and a piggy back relay box attached to it. I must not be seeing the mini-box.

 

[sarcasm] It's the one that's not in your owner's manual. Thanks, Ford! [/sarcasm]

Couldn't resist taking that swipe at them.

It's back in the corner under the hood spring, on the inner fender close to the firewall.

Two fuses: A 5A for the PCM KAM and a 20A for the trailer BRAKE /TURN SIGNALS.

Steve

 

11 year old truck with no telling how many owners. I bought the truck with a bad motor from a bank after it was filed in bankruptcy. I did not get an owners manual with it. Thanks for the information.

 

You can download a copy from www.fleet.ford.com under maintenance.

My point was that Ford failed to document it in the 98's manual.

Steve

 

Download the 1998 Owners manual, so you have it. If you want the info on the mini fuse panel, also download the 1997 manual.

Here is the page from the 1997 owners manual :



Here is a picture of where it is at ( cover removed, cover might still be covered in tape ):

 

SSCULLY, you've got class! You're a teacher (not a smartass, like some in forums like these)!

- Jack

 

Jack,

Thanks for the compliment, but I have my moments also.
I have been known to be a smart @ss more then once myself.

I like to think it is not unless provoked though...?

Steve

 

With your help I now have my problem fixed. I appreciate everybodys help and the link to the owners manual. I worked on this for over 4 hours tracing wires and checking fuses but never saw that mini-fuse box.

 

 

another trailer light problem fixed by checking the under hood fuse box

 

The internet is MAGIC. I've been chasing this exact same problem ('98 F-150) for the better part of today. I even had to go out a purchase a new test light while fiddling with the trailer plug. I had checked all of the fuses in the big box under the hood. I had NO idea about the little box.
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Many, many thanks to SSCULLY!!!
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All of this two years after the original post.

 

Now three years later this post saved the day. I struggled to solve this problem for two days.Thanks to those who are smarter them me. http://images.ibsrv.net/ibsrv/res/sr...ilies/bows.gif

 

Man you guys are great,
my trailer lights have been out or over a year, and the xxxxing dealer couldn"t
tell me where that fuse was ???????
I read this thread and went right out and fixed them the ole lady thinks I m nuts thanks loads,