74 f100 blinker problem

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Nov 14, 2010 | 08:48 AM

#16

LittleG

Freshman User

Joined: Jul 2007

Posts: 35

Likes: 1

Fluid level is ok . Here's a question ... What is the purpose of the wires that connect to the brake portioning valve? Could this have something to do with the problem. It appears everthing else works. I just added PS,PB and Auto trans to this truck and the only thing left to finish are these stubit blinkers.

Nov 14, 2010 | 12:09 PM

#17

Nathan Plemons

Elder User

Joined: Aug 2004

Posts: 796

Likes: 1

I wouldn't know for sure without looking at the wiring diagrams, but it would seem to me that those wires would have something to do with the "brake" indicator lamp on the left side of your gauge cluster. Not sure exactly what it monitors but it does light up momentarily when I start my car.

Nov 14, 2010 | 12:48 PM

#18

thatsrealnice

Laughing Gas

Joined: Oct 2009

Posts: 874

Likes: 56

From: Merlin, OR

Quote:

Originally Posted by LittleG

There's a brake fluid indicator switch that those wires connect to, and that switch indicates if the fluid distribution is off. A lot of times though, the switch that goes into the proportioning valve which those wires plug into are faulty. They're made of plastic, and leak, which makes the brake light come on in the cab. I doubt that is the problem with your turn signal issue. I was having some problems with mine, here's the link to the thread on my turn signal/brake issue.
https://www.ford-trucks.com/forums/9...t-problem.html