abs light on

[Doc Moses]

deleted

 

[Msfitoy]

It stays on until you're in motion...at a certain speed it goes off...I think this is to indicate it's ok status mode...

 

[Kev250R]

It stays on until you're in motion...at a certain speed it goes off...I think this is to indicate it's ok status mode...

Correct, although I think it has more to do with the ABS computer needing to see some actual feedback from the sensors before going-off. Both of my KTM's behave the same way. By the time I reach the end of my comically-short driveway, they're off.

 

[Kev250R]

I own a 22 model, bought in October, it has maybe 300 miles on it. Yesterday, after installing a front/rear dash cam, I noticed my abs light was on, and stayed on. I checked voltage, which is 12.5; I drew the acc input for the unit from the black wire in the headlight harness. The dash cam unit also uses a lead from the positive battery terminal. Is it possible that by drawing power from that black acc line, I have somehow triggered the ABS response? Has anyone had any similar experience or issues?

If it's staying on while you're riding, then yes you have a problem. I think there is a way to read the ABS computer (count how many times the light flashes or something) and it'll give you a code.

In your case I think I would un-do your camera install, see if the problem goes away then either use battery-powered cams or connect directly to the battery.

 

[dmonkey]

I would check battery voltage (low voltage will fault the ABS), check the ABS fuses, and inspect the ABS pulse sensor on the front right fork leg that reads the front rotor pulser ring.
You can find a service manual in this thread which details the fuses as well as ABS Diagnostic Trouble Codes and various conditions that would fault the ABS:

Honda Trail 125 CT125 PDF Manual Downloads - Owners, Service, Parts Catalog

Owner's Manual: A booklet that is included with the purchase of a new Honda Trail 125. The Owner's Manual may be located inside the black toolbox located on the left side of the bike below the rear carrier rack. A hex key for opening the tool box can be found clipped to the top of the fuel tank...

hondatrail125.com

I'm also assuming you're running stock gearing. If not, changing sprocket tooth counts can fault the ABS.