hi, on a 2003 4x4 blazer, can someone help me identify the ground that's screwed to the chassis a few inches under the ABS ground (under the airbox)? there is some kind of yellow plastic connector attached, which in my case is unplugged, but I can't find any loose connection.
I've looked through dozens of diagrams but couldn't find an answer.
thanks!

 

item 4? G117?

 

thanks but no, this diagram seems to be of the dashboard backside, whereas the abs module ground is directly under the airbox, between radiator and windshield washer fluid container.
Could it be that it belongs to the right front wheel abs sensor, or are these un-grounded?

 

Take a picture of it, that'll help.
When you said yellow I though of the Airbag Sensor.

 

This link is for an 04 but should be close

http://thebigtrader.net/ServiceManua...%20LOCATOR.pdf

or

1995+ Chevrolet Blazer and GMC Jimmy

 

thanks for the great link, Myheadache! still it's not a 100% clear to me what it is. maybe the battery fuse?
@rottidog: I'll take a pic on the weekend. If it's the airbag sensor I better not fiddle with it, I guess!

 

Ok, confirmed, it's the ground for the battery fuse. thanks for your help guys!

 

BTW, another way to prove my theory is plug the right horn back in and back probe the positive wire with a multimeter. I bet that you get low or no voltage when you activate the horn because the load cause a big voltage drop through the corroded location. If you unplug the horn and do it again you’ll get a higher voltage with no load. Current goes up under load and ohms law describes a voltage drop across the resistance of the corrosion.

George

 

Hey, uh, George... Think you posted in the wrong thread lol