No brake lights on 1987 Ford L8000! - Ford Truck Enthusiasts Forums

Large Truck My truck is bigger than yours. The forum for 2+ ton trucks (all years), COE's, Louisville's, Big-Job's etc.

No brake lights on 1987 Ford L8000!

Thread Tools Search this Thread
Old 12-29-2011, 12:53 AM
87FordL8000 87FordL8000 is offline
New User
Thread Starter
Join Date: Dec 2011
Posts: 1
87FordL8000 is starting off with a positive reputation.
No brake lights on 1987 Ford L8000!

Hello all! I replaced the turn signal switch in this vehicle over a year ago (at the time, I had no brake lights or turn signals) and when I did, everything worked. Now, I have no brake lights, however, I do have functioning turn signals and hazard lights. My brake lights do not light up on the vehicle nor on the dash when the pedal is depressed.

I have tried a test light on the two brake switches on the firewall (I assume they are brake switches, they are kind of round and bulb type with a few wires coming out of them) and I don't have any power anywhere on either of them. When I connect the terminals together with a screwdriver, I don't have any brake lights either.

I know when we were trouble shooting this last year, the brake switches acted the same as they do now. It was then I replaced the turn signal switch and it all worked. Before I dump another $140 or so on a switch, I wanted to find out if there were any other avenues to go down to test. I have looked all over for a service manual for some sort of wiring diagram, but I have just come up empty.

I hope someone can help. Thank you!
Reply With Quote
Old 12-04-2012, 09:15 PM
crazyone crazyone is offline
New User
Join Date: Sep 2008
Posts: 6
crazyone is starting off with a positive reputation.
Was searching online and found used service manuals and wiring diagrams
I bought a set of wiring diagrams for 19.95. I am currently troublshooting the same problem. Both switches in engine bay tested good, but no power. Truck was overhauled in Feb 2012 Vendor has three different check points where they have to be verified to work before it can leave plant in Ohio. but it has been two other places since. One of them "borrowed" wiper control and caused a couple of other problems which I am also trying to figure out. Other than that it is a great truck. Do not know why Ford sold the line off.

Last edited by crazyone; 12-06-2012 at 12:49 PM. Reason: change content and add web address
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
New guy ! no turn signals Casper99 1997-2006 Expedition & Navigator 46 11-09-2016 07:58 PM
BRAKE LIGHTS littleredford69 Other; Brakes, Electrical, Hitches, Weight Distribution & CDL Discussion 4 02-27-2016 02:13 PM
Aftermarket turn signal problem. Please help! jhaas63 1948 - 1956 F1, F100 & Larger F-Series Trucks 8 01-03-2014 07:20 PM
1956 F100 Tail light/Brake light issue jy1956f100 1948 - 1956 F1, F100 & Larger F-Series Trucks 6 07-09-2012 01:28 AM
Swapping turn signal switch on 72 F100 kwanderi 1967 - 1972 F-100 & Larger F-Series Trucks 9 11-06-2004 07:53 PM

Go Back   Ford Truck Enthusiasts Forums >

1979, 1987, 8000, 86, brake, brakes, dash, flasher, ford, l8000, light, ln8000, require, signal, switch

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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

All times are GMT -5. The time now is 04:22 PM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.