Go Back   Ford Truck Enthusiasts Forums > Bronco > 1978 - 1996 Big Bronco
Sign in using an external account
Register Forgot Password?


1978 - 1996 Big Bronco SPONSORED BY:

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #16  
Old 08-19-2011, 05:34 PM
ErrorS ErrorS is offline
Posting Guru
 
Join Date: Jan 2005
Posts: 1,749
ErrorS is starting off with a positive reputation.
I'm gonna get that harness in the future, though if I do that I'll definitely wanna go with relays.

guess what, now my dome light switch isn't working (when you turn it all the way) unless you wiggle it. Looks like this BWD is going back.

I'm extremely frustrated right now.
__________________
1990 - Bronco. 351W. E40OD

Run codes first, ask questions later.
Reply With Quote
  #17  
Old 08-24-2011, 09:48 PM
FourXFord2's Avatar
FourXFord2 FourXFord2 is offline
Elder User
 
Join Date: Sep 2010
Location: Small acerage in Nebraska
Posts: 555
FourXFord2 has a good reputation on FTE.FourXFord2 has a good reputation on FTE.
Keep going Errors, sounds like you about have the gremlin nailed down. Sorting through a wiring harness with almost a hundred wires in it take lots of patience! I have experienced the dimmer switch problem, driving down the highway at 60 mph and headlights go out. not fun. I had a problem with the potetiometer or that spring looking thing at the front of the switch once. I replaced it with a used OEM I had kept and havent had another problem yet.
Reply With Quote
  #18  
Old 02-17-2013, 03:14 AM
Batman23 Batman23 is offline
New User
 
Join Date: Feb 2013
Posts: 3
Batman23 is starting off with a positive reputation.
Quote:
Originally Posted by ErrorS View Post
Well, apparently all I was doing with the switch working halfway out was 'shorting' the switch and giving power to the dome/taillights from the headlight power feed, so a badly built switch just confused me.
I found that there are multiple power supply wires, a seperate one for dome and/tail lights and it was shorted.

See, common sense says I shouldn't get power to tail or dome if there was a short or blown fuse, which is why this was so annoying to troubleshoot. It shouldn't 'sometimes' work or only work under certain conditions.. but because of the weird switch design, I could make them work if I had the stupid switch out halfway.

If anyone runs into this, Tan/White to the switch powers the dash lights and taillights. I found out that it wasn't supplying any power at all.. shorted a wire and blew a fuse in the old switch. At least, I think, haven't replaced the fuse or checked the wire yet.

Sorta glad I went through this though, apparently the Autozone switches only last a few months, this BWD is definitely a better switch AND it was a few bucks cheaper.
Well, I am glad I found this thread and this post. I am having the same exact problems with my 1989 F250. I thought it was odd that I could only get both headlights and taillights working if I carefully placed the switch at 1 1/2 position. A fraction either way and I lost one end. The shorting between the headlight terminal and the taillight terminal makes sense.

I have had my truck since 1998. I drive it very little in reality, pull boats, snow machines and haul stuff. I have had no problems with lights until about a year ago and Boom! same exact symptoms as the OP. I figure no problem, change out the switch. I have a Motorcraft switch from a parts truck. Pop it in and… NO CHANGE!! I think maybe two bad switches so I order a new one, turns out to be a “Standard Motor Products” T-Series DS268T switch. I plug it in and same symptoms. I read some forum posts and find many issues related to the nine wire plug at the switch. I order a replacement and install it (cut, solder and heat shrink). Plug in the NEW switch and I can’t get it to “short” and make both lights (head & tail) come on. I plug in the second Motorcraft switch and I can get this one to “short”. I got lights! … sort of…

I read my wiring diagrams and look at the switch to come up with an idea. Nothing happening up there. I read some forum threads and I find this one. I have some questions about the above post:

My diagram shows that the Tan/white wire comes from 15Amp fuse position #4. I am seeing that the Brown wire goes to the marker lights and taillights. The Blue/red wire powers the instrument panel/dash lights. The Blue/red gets its power through the rotating dimmer wheel which is powered directly from the Brown wire. No power to Brown, no power to Blue/red. Are you saying that I am getting no power from Tan/white which in turn means no power to Brown? What was your fix?

What do you mean “blew a fuse in the old switch”. I see no indication that there is a fuse in the switch, only the fuse box. Do I need a new switch (which one, BWD?) or just replace that one wire?

Thanks for your post! Hope you are still around! Hope you have it all worked out!
Reply With Quote
  #19  
Old 02-17-2013, 03:15 AM
Batman23 Batman23 is offline
New User
 
Join Date: Feb 2013
Posts: 3
Batman23 is starting off with a positive reputation.
Quote:
Originally Posted by ErrorS View Post
I'm not sure which is dome light.. black/pink is one of them, don't know if its the feed wire or not though.
The Green/yellow is the incoming door switch for dome light and the Black/pink is the power to the Dome light.
Reply With Quote
Old 02-17-2013, 03:15 AM
 
 
 
Reply

Go Back   Ford Truck Enthusiasts Forums > Bronco > 1978 - 1996 Big Bronco

Tags
1990, autozone, f150, f250, ford, harness, headlamp, headlight, hot, light, replace, sw271, switch, truck, wiring

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Headlight Switch Connector Replacement, '92-on asavage Aerostar 4 05-07-2012 03:27 PM
1980 ford 7000 wiring diagram Ford7000 Large Truck 1 08-05-2011 07:15 PM
1988 F250 7.5L Headlight Issues MAX5834 1987 - 1996 F150 & Larger F-Series Trucks 11 04-22-2011 10:09 PM
Marker / Tail light problem djjoshuad 1978 - 1996 Big Bronco 2 09-07-2006 01:31 PM
Dash / Marker / Tail light problem - 93 bronco djjoshuad Electrical Systems/Wiring 3 09-04-2006 06:52 AM



All times are GMT -5. The time now is 03:55 PM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup