|
08-21-2006, 06:03 PM
|
#1
|
2 Rivet Member
Currently Looking...
Celaya, Gto.
, MEXICO
Join Date: Aug 2006
Posts: 24
|
help brakes
I have a question I put a DrawTite 2-4 Brake Electronic Brake Controller - Time Delayed and the trailer brakes doesn’t work,( I own an old travel trailer ´80, Bravo (brand), made in Ciudad Juarez Mex. about 29-30f. and 6000 lbs, two axel). I checked all wiring (7 pin connector), and every thing works fine, but no brakes. I have current in the connector (blue wire) and following the wire there are continuity till the brakes, but after the magnet also I have power (with a light tester), is that correct?, because I thought one wire goes to ground and the other comes with de current, wrigth?. With the other truck (82 Dodge 360) I used a Tekonsha hydraulic type, and the brakes works fine, now I change it for a 96 F250 PSD and I have the problem. I have read that unless you go more than 10-15 miles/hour (maybe this weekend I’ll try but in the meantime) , it will work, is that correct? or what is wrong? How can I test the electro-magnets and to know if they are fried?
Thanks for all the inputs.
|
|
|
08-21-2006, 06:24 PM
|
#2
|
418
2007 25' Safari FB SE
1958 22' Flying Cloud
1974 29' Ambassador
Yucca Valley
, California
Join Date: Jun 2002
Location: 1963 26' Overlander
Posts: 4,804
|
Quote:
Originally Posted by DOCTOR-MX
How can I test the electro-magnets and to know if they are fried?
Thanks for all the inputs.
|
Put 12V power straight to the magnets. You should hear a clunk and/or a hum from inside the brake drum.
Also, make sure your negative side is solid ( ground)
|
|
|
08-21-2006, 06:59 PM
|
#3
|
2 Rivet Member
Currently Looking...
Celaya, Gto.
, MEXICO
Join Date: Aug 2006
Posts: 24
|
Uwe, thanks for your answer, I already put 12V straight to the magnets and not any noise and with the axe in block, the wheel spins freely. I´m goning to check the ground. any other idea?
thanks again
|
|
|
08-21-2006, 07:22 PM
|
#4
|
418
2007 25' Safari FB SE
1958 22' Flying Cloud
1974 29' Ambassador
Yucca Valley
, California
Join Date: Jun 2002
Location: 1963 26' Overlander
Posts: 4,804
|
Quote:
Originally Posted by DOCTOR-MX
Uwe, thanks for your answer, I already put 12V straight to the magnets and not any noise and with the axe in block, the wheel spins freely. I´m goning to check the ground. any other idea?
thanks again
|
Time to pull the drums and inspect the wiring and magnets. You might try and read resistance for each individual magnet, and make sure you don't have a wiring break somewhere, or a corroded ground terminal, hard to say without actually being there....
Remember, it takes hot AND ground to make things work.
|
|
|
08-23-2006, 04:03 PM
|
#5
|
Rivet Master
1960 22' Safari
in the wilderness
, The great Mojave Desert
Join Date: Jun 2006
Posts: 4,077
|
Dr. Mx. Can you pull the drum and post some pictures of the brakes, wires etc?
__________________
I'd rather be boon docking in the desert.
WBCCI 3344 FCU
AIR# 13896
CA 4
Yes, we have courtesy parking for you. About an hour North of Los Angeles.
|
|
|
08-25-2006, 06:28 PM
|
#6
|
2 Rivet Member
Currently Looking...
Celaya, Gto.
, MEXICO
Join Date: Aug 2006
Posts: 24
|
pics
I will, but first I´m going to check the groun, but now it´s rainning a lot here in my town, so I have to wait to better weather. Thanks anyway.
|
|
|
08-30-2006, 04:59 PM
|
#7
|
2 Rivet Member
Currently Looking...
Celaya, Gto.
, MEXICO
Join Date: Aug 2006
Posts: 24
|
Another questions: I´m planning to work tomorrow with my trailer brakes, (if it doesn´t rain)
1.- The magnets has 2 wires, is one of them specific for hot (12V) and the other for ground, or it doesn´t matter which one you use? are there any mark (+ or -) on the magnet or an specific position (central or periferic or something like that)??
2.- The magnets have to show continuity between the wires with the tester?
Thnx for the inputs
|
|
|
08-30-2006, 05:18 PM
|
#8
|
418
2007 25' Safari FB SE
1958 22' Flying Cloud
1974 29' Ambassador
Yucca Valley
, California
Join Date: Jun 2002
Location: 1963 26' Overlander
Posts: 4,804
|
Quote:
Originally Posted by DOCTOR-MX
Another questions: I´m planning to work tomorrow with my trailer brakes, (if it doesn´t rain)
1.- The magnets has 2 wires, is one of them specific for hot (12V) and the other for ground, or it doesn´t matter which one you use? are there any mark (+ or -) on the magnet or an specific position (central or periferic or something like that)??
|
The wires coming off the magnets can be connected either way, as long as there is no short. Not speficic to + or -
Quote:
Originally Posted by DOCTOR-MX
2.- The magnets have to show continuity between the wires with the tester?
Thnx for the inputs
|
The magnet coil must show resistance. I do not know the actual value off hand, but there should be some Ohm reading on your meter, neither indefinite, nor "0".
|
|
|
09-01-2006, 06:43 PM
|
#9
|
2 Rivet Member
Currently Looking...
Celaya, Gto.
, MEXICO
Join Date: Aug 2006
Posts: 24
|
good news.
First thanks again uwe.
I worked all yesterday morning checking the wires under the TT, and I founded that the problem was the ground wire, in some part was interrupted. So I put a new one and every thing is working OK. I can hear the "buzz" of the magnets and the wheels blocks in both sides when foot or manual break action.
So in resume, as several of you mentioned and which I founded in the forum searching for electric brakes, the main problem is GROUND.
Maybe next week I´ll try it on the street.
Thank a lot to all of you and the wonderful AS forums.
My best regards. JOSE A.
|
|
|
09-01-2006, 06:46 PM
|
#10
|
2 Rivet Member
Currently Looking...
Celaya, Gto.
, MEXICO
Join Date: Aug 2006
Posts: 24
|
I read that the resistance is 3.2 ohms.of the magnets.
|
|
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|