How to Test/Diagnose ABS system on a Semi Truck Trailer

Testing a Wabco System ABS for faults.
Found rear abs sensor bad.
ABS Light turns off and on after stopping.
ABS Brain possible malfunction.

search here for ABS Blink code sheet

[bindersbikesandstuff]

Nobody else noticed the new brakes with the leaking wheel seal?

[feeneysmechanical]

You can put your multimeter on ac voltage and watch the number's change. Or hook up a labscope. Like from snapon

[arceniovalenzuela]

Thank you for the advice on this system

[GODwilljudge]

That ring gear should be allot cleaner! That can also read faulty if it’s so dirty

[elebeu]

The meter should be set to AC voltage when spinning the wheel. The AC voltage reading will rise as the wheel is turned faster. Look for blips in the readings while the wheel is turning.

[jonathanstimpert]

I've had many sensors appear good, ohms around 1200, ohms drop while spinning wheel, voltage goes up when spinning a wheel. But sensor was still bad

[sts.]

2;38 check the too pins on ecu that cable unplugged from and should put out 5 amps and you know the computer is putting out to that sensor

[sts.]

i made a rod bout 6'' to reach in and tap that sensor to the tone ring with that wheel jack up spin it and if sensor is touching it will make a mark on ring if it dont tap it in till it does

[Tyrone-cdji]

New shoes and drums, nobody did a good visual check on the sensors then ?

[Gomezwill]

Could that wheel seal leaking turn the light on

[brkbrk]

I bought trailer Vanguard 2007 dry van. Someone bypassed the abs light so it looks like abs system is working. My question is which wire gives power to abs light ?

[oscarsegovia]

Got any info on how to troubleshoot abs light on the truck i have already clean the tone wheel replace new abs sensor check for voltage to the sensor and still getting fault code for that sensor

[paulhammond]

New shoes on the abs axle, drums been off was the sensor pushed out to meet the exciter ring ? And exciter ring looks awful

[brkbrk]

im back

is consistency and i still get the yellow light, new green cable that connects truck and trailer but i know that the truck is not issue cause i have other two trailer and i never get the abs light on This issue is driving me crazy. What could be the problem that triggers the abs light to come on ? Yellow light blinks 6 and repeats that for three times

[tylerseabook]

The sensor shouldn’t be touching the ring

[TheDriller]

how about you fix that weak seal . 😂😂😂. that will put you out of service and abs won't