Brake light ?????
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Junior User
Joined: Feb 2005
Posts: 59
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From: Slater Iowa
Brake light ?????
I finished wiring up my 48 and all the lights are working.The problem I'm having is when I apply the brakes not only the tail lights work but the parking lights in front come on also. Any one have any ideas where I screwed up????????????
FTE Chapter Leader
Joined: Dec 2001
Posts: 3,636
Likes: 11
From: Crossville, Tn
Well that depends on where you wired the brake light switch to. Some of the old axillary signal kits had the brake lights wired into the switch. If that is the case, it sounds like you have the front and rear turn signals both running off the same lead. In other words left signal, front and rear off the same terminal and the same on the right. That is assuming that you have the parking light wired as turn signals also. If they are not, then you have the brake lights wired to the parking lights rather than the turn signals.
Post Fiend
Joined: May 2008
Posts: 7,641
Likes: 21
From: Poway, Ca.
Do you have turn signals?
Chances are you have a wire crossed at the truns signal switch. Or you have your parking lights wired off the signal switch (and not the headlight switch) and didn't convert to two wire two post sockets up front. The two post sockets take signal power from the signal switch and parking light power off the headlight switch!!!!!
If you didn't change the sockets, no workee rightee!
Here is a basic light and headlight switch wiring diagrams for the Bonus and Economy built trucks. The signal switch in the diagram is for a 7 wire "Everlasting" type. If you have a different switch let me know.
PS: "HOT BUS" is hot power supply that is always on (not turned on and off with the ignition switch) "SWITCHED BUS" is power in that is turned on and off with the ignition switch.
Chances are you have a wire crossed at the truns signal switch. Or you have your parking lights wired off the signal switch (and not the headlight switch) and didn't convert to two wire two post sockets up front. The two post sockets take signal power from the signal switch and parking light power off the headlight switch!!!!!
If you didn't change the sockets, no workee rightee!
Here is a basic light and headlight switch wiring diagrams for the Bonus and Economy built trucks. The signal switch in the diagram is for a 7 wire "Everlasting" type. If you have a different switch let me know.
PS: "HOT BUS" is hot power supply that is always on (not turned on and off with the ignition switch) "SWITCHED BUS" is power in that is turned on and off with the ignition switch.
Post Fiend
Joined: May 2008
Posts: 7,641
Likes: 21
From: Poway, Ca.
Not true. The parking lights are powered off an isolated circuit from the headlight switch and are not connected in any way to the running lights or brake lights except that they use a common ground. And power does not flow backwards up from ground. Please see the diagram above.
Fleet Owner
Joined: Dec 2000
Posts: 25,403
Likes: 5,409
From: Central PA
I'd keep it as it is. Now you have front brake lights! The people in front of you will know that you are slowing down. Who know, maybe the Auto manufacturers will use your ideas on the 2012's.
Post Fiend
Joined: May 2008
Posts: 7,641
Likes: 21
From: Poway, Ca.
Hey look at the bright side, you can drive around in reverse all the time and still be legal!
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