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Electric brake a stopping tool

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John

12-02-2001 17:23:29




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I pull my tractors with a 92 Chevy Silverado I have a electric brake controler. I have noticed when I apply the brake that the speedo jumps up about 4-5 mph. It only does it when the trailor is attached I have checked the grounds. I know the speedo is electric. But should it be back feeding through the system like that?? Has anyone else noticed this?? Should I ignore it?? Once I noticed it the first time it has worried me since. Any sugjestions would be great. Thanks

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Chad

12-06-2001 05:13:33




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 Re: Electric brake a stopping tool in reply to John, 12-02-2001 17:23:29  
You might check where your brake controller is tied into the stoplight switch. Instructions for my '96 said to tie into a connector above the parking brake and not to the stoplight connector white wire. The previous owner had done mine wrong and it was causing trouble with the cruise control etc...
FWIW
Chad



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Thurlow

12-04-2001 18:17:58




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 Re: Electric brake a stopping tool in reply to John, 12-02-2001 17:23:29  
On every electrical component (all lights, brakes) on farm trailers, I have learned to solder and heat-shrink each splice. Also run ground wire all the way back to the connector from each component. Before I started this, the ground would eventually fail (every time), causing all kinds of problems. Really bad on cattle trailers because of rust formed due to acid or whatever in manure.



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Ray,IN

12-02-2001 19:54:05




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 Re: Electric brake a stopping tool in reply to John, 12-02-2001 17:23:29  
Hope you don't mind if I guess. Do you have a ground wire run through your connector plug? Most trailers use the hitch ball for the ground connection. It's not the correct way to run the ground, but it's the most expedient. If your trailer connection plug does'nt have a ground wire for a direct system ground try a temporary one by running the trailer ground wire to a solid frame ground on the truck. A poor/loose ground will cause high impedience and feed back to instruments, or so I've been told. Anyway it's a cheap test, and if it corrects the problem you can wire the connection plug properly. Another possible cause is the trailer brake wires are reversed, usually this will blow the fuse/curcuit breaker. Good Luck!

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John

12-02-2001 21:25:33




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 Re: Re: Electric brake a stopping tool in reply to Ray,IN, 12-02-2001 19:54:05  
Thanks for posting. That was the first thing I thought also. I am useing the 4 prong plug. The white is the ground. I have it grounded to the frame on the truck side and on the hand winch on the trailor side. I even ran a extra ground to temperarly try and it done the same thing. It kind of worries me with the trucks computer. I sure don't want to mess that up. I was wondering if the magenets on the brakes could be generating electric and backfeeding the system. Maybe it needs a diode that lets electric flow one way but not the other like a valve. Any Ideas????? ?

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charlie

12-03-2001 15:08:30




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 Re: Re: Re: Electric brake a stopping tool in reply to John, 12-02-2001 21:25:33  
what wire on a 4 prong do you feed off the controller?all my trucks have 6 prong connectors and take 5 wires to make the system work.you use one for lights,two for turn signals,one for brakes,and one for ground.good luck



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John

12-03-2001 15:44:11




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 Re: Re: Re: Re: Electric brake a stopping tool in reply to charlie, 12-03-2001 15:08:30  
I guess I should have added in the post I use an extra single plug for the brake wire and I use the white wire in the 4 prong for the ground. Thanks for paying attention.



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Ray,IN

12-02-2001 23:18:31




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 Re: Re: Re: Electric brake a stopping tool in reply to John, 12-02-2001 21:25:33  
Try this link for answers to your problem. I'm sure no expert, that guess was my limit.



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Dusty

12-03-2001 16:54:34




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 Re: Re: Re: Re: Electric brake a stopping tool in reply to Ray,IN, 12-02-2001 23:18:31  
You should run the ground right fron the battery, it should be a #10, the same size from the controller. The 4 wire flat plug is not really heavy enough.

Good Luck,
Dusty



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