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Parking Brake and RABS Lights on Code 4

Tiny
OBXAUTOMEDIC
  • MECHANIC
  • 1994 FORD AEROSTAR
  • 3.0L
  • 6 CYL
  • RWD
  • AUTOMATIC
  • 150,000 MILES
OK, Hi all,

Another problem having trouble correcting. Going through the code 4 testing all was checking out till got to number 5 were is says - Measure resistance between anti-lock electronic control module harness connector Pin 6 and chassis ground, there should be a reading of greater than 12 ohms well I get nothing and it says to find and repair the ground short along Circuit 535 (LB/R). Well check wiring and all appears to be good. So if anyone knows were to look for this ground short in the circuit please let me know.

Thank Gang

Mark
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Tuesday, January 20th, 2015 AT 7:27 PM

13 Replies

Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
U ARE PUTTING THE VOLT METER ON OHM'S SCALE RIGHT? THEN YOUR PUTTING 1 PROBE ON PIN 6 CONNECTOR ON THE MODULE AND A GOOD GROUND ON THE BODY OR METAL. U ARE GETTING A 0.00 READING?
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Tuesday, January 20th, 2015 AT 8:41 PM
Tiny
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Yes I had it set at the 200 ohms scale for all resistance tests.

Ok, sounds like your saying that I should have used pin 6 on the module itself and the testing according to says pin 6 on harness.
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Tuesday, January 20th, 2015 AT 9:10 PM
Tiny
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That should have said according to Mitchell1.
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Tuesday, January 20th, 2015 AT 9:12 PM
Tiny
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OK, So just went and check pin 6 from the control module to ground and still don't get any readings. Also I am not much on the wiring on vehicle I can do it just usually end up in some cases like this on to get it figured out. It is my personal vehicle.
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Thursday, January 22nd, 2015 AT 10:07 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
In pic check ground for pin6 harness wire to where I've pointed out to switch below master. If it shows zero on ohms then it' s good til there(harness) then check black wire to ground on fender or battery if that is good then I'd say it's the switch is bad. Just looking at the diagram.
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Friday, January 23rd, 2015 AT 12:28 PM
Tiny
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OK, Think I did that once or twice, have gone over it so many times. But will check it again once I get a day it's not raining.

Thanks Hmac300
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Friday, January 23rd, 2015 AT 4:54 PM
Tiny
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Sorry lost track of this question thks Hmac300
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Friday, January 23rd, 2015 AT 6:02 PM
Tiny
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OK, Do I leave the harnesses plugged in? For example Pin 6 test Unplugged from Module and ABS Hydrolic Assembly I get reading of 3ohm and according to it means good. Now with plugged into control unit and ground at hydrolic assembly I get over 18000ohms which according to is what I should get when pin 6 on module is grounded. And on the ground(blk/wht) wire I get 3ohms and once again according to Mitchell1. Says 3ohms or less is good. So I guess I am a little confused to whether or not the harnesses should be plugged in or not.
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Sunday, January 25th, 2015 AT 1:55 PM
Tiny
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Ooopps,

Should be 1800ohms and says if 12ohms or greater
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Sunday, January 25th, 2015 AT 1:58 PM
Tiny
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THERE IS ONLY ONE OHMS SCALE JUST REMOVE THE MODULE CONNECTOR AND MEASURE OHMS FROM PIN6 ON THE CONNECTOR TO GROUND KEY ON.
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Sunday, January 25th, 2015 AT 3:59 PM
Tiny
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OK, So I get 0 readings when checking harness pin 6 at module. So I'm taking it since that checks out good and the ground checks out good that the ABS Hydraulic Assembly is the culprit. Also here is a pic of my DVM and OHMS Scale and everything I read said to use the 200 ohms scale
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Monday, January 26th, 2015 AT 8:55 AM
Tiny
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OK, forgot to reduce image size.
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Monday, January 26th, 2015 AT 9:05 AM
Tiny
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OK, part finally can in and put it on and lights are off. Thanks for all your input and needs to correct the test procedure.

Thanks Again

Mark
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Thursday, February 5th, 2015 AT 12:32 PM

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