ABS sensor installation

KATHY CLARY-YANCEY

MEMBER
2008 MERCEDES BENZ GL450
4.7L
V8
4WD
AUTOMATIC
170,000 MILES

I have replaces 3 speed sensors when I got to the front passenger side the connector plug as 2 wires one is speed sensor the other is brake pad wear sensor. Problem is, I can’t find the wire harness that has both wires connected to the same plug. Am I missing something?

5 Replies

JACOBANDNICKOLAS

MECHANIC
109,700 POSTS

Hi,

There isn't one plug for each. To the best of my knowledge, they are separate and the speed sensor connects at a small black box usually behind the strut assembly. I looked up the sensor wiring, and it shows it going to the control module.

Is that what you're asking?

Joe

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Monday, July 20th, 2020 AT 1:05 PM

KATHY CLARY-YANCEY

MEMBER
3 POSTS

I took a photo, one wire coming out of the black plug is the speed sensor wire the other is the brake pad wear wire, but I can’t find anything on the internet that looks like this.

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Monday, July 20th, 2020 AT 1:18 PM

JACOBANDNICKOLAS

MECHANIC
109,700 POSTS

What is on the opposite side of that plug? Is it the sensor?

Joe

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Monday, July 20th, 2020 AT 3:42 PM

KATHY CLARY-YANCEY

MEMBER
3 POSTS

One wire end hooks to the speed sensor the other wire end hooks to the brake ad wear sensor.

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Tuesday, July 21st, 2020 AT 12:22 PM

JACOBANDNICKOLAS

MECHANIC
109,700 POSTS

When you disconnected the original one, was it attached to the control arm assembly? Normally, they are attached and connected there. See the two pics I attached.

Joe

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