1999 k2500 abs problem

dunebound69 · 02-27-2009, 09:46 AM

On my 1999 k2500 with the 7.4 my abs is coming activating on dry pavement. Seems to do it more often on turning/braking combo. I have check brake fluid and power steering fluid. My scanner dose not seem to bring up anything for abs. Actron 9150. Any info would be wonderful. The truck has 170000 miles.

03chevy · 02-27-2009, 09:48 AM

to get codes from your abs system you need a abs scanner

crabtruck · 02-27-2009, 11:08 AM

One thing to keep in mind is that an ABS light can show activation (use), not just failure.
I would suggest inspecting the brakes to see that the basics are good.
ABS activates when it sees a mismatch for wheel speeds/braking apply.

You didn't mention speed this happened at. One thing that can cause
low speed (< 5mph) light is rusty sensor mounting area. Somewhere
in another thread I was trying to remember the test value of those.
I put it here only because I remember it right now. If you unplug
those front wheel sensors and spin the wheel by hand, you should get
about 350mV AC across its wires. If 200-350, too big a gap between
sensor and the reluctor ring may exist due to crud. Clean & retest.

dunebound69 · 02-27-2009, 11:31 AM

I is happening at low speed. IE at a stop light, turning into the driveway. ABS light comes on goes out. Front brakes have about 30k on them but don't look bad yet. I don't go through brakes to fast, I don't go from gas to break. It is legal to coast up to a stop. (The other half at the house kills a set every 15k, I don't even like to ride with her). Thanks for the tips I will look at them this weekend with any luck.

leolkfrm · 02-27-2009, 01:33 PM

If it hasn't been done lately, you may want to consider flushing the lines with new fluid and change the rubber hoses on the front, abs may be sensing sluggish fluid flow

02-27-2009, 09:46 AM	#1
dunebound69 Full Member Join Date: Feb 2009 Posts: 10	1999 k2500 abs problem On my 1999 k2500 with the 7.4 my abs is coming activating on dry pavement. Seems to do it more often on turning/braking combo. I have check brake fluid and power steering fluid. My scanner dose not seem to bring up anything for abs. Actron 9150. Any info would be wonderful. The truck has 170000 miles.

02-27-2009, 09:48 AM	#2
03chevy Senior Member Join Date: Dec 2006 Location: jax,fl Posts: 1,186	to get codes from your abs system you need a abs scanner __________________ A dirty mind is a terrible thing to waste!

02-27-2009, 01:33 PM	#5
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 4,300	If it hasn't been done lately, you may want to consider flushing the lines with new fluid and change the rubber hoses on the front, abs may be sensing sluggish fluid flow __________________ 4 wheels move the body 2 wheels move the soul B.W.A.I

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02-27-2009, 11:08 AM	#3
crabtruck Senior Member Join Date: Jul 2007 Location: on your 9 Posts: 3,366	One thing to keep in mind is that an ABS light can show activation (use), not just failure. I would suggest inspecting the brakes to see that the basics are good. ABS activates when it sees a mismatch for wheel speeds/braking apply. You didn't mention speed this happened at. One thing that can cause low speed (< 5mph) light is rusty sensor mounting area. Somewhere in another thread I was trying to remember the test value of those. I put it here only because I remember it right now. If you unplug those front wheel sensors and spin the wheel by hand, you should get about 350mV AC across its wires. If 200-350, too big a gap between sensor and the reluctor ring may exist due to crud. Clean & retest.

02-27-2009, 11:31 AM	#4
dunebound69 Full Member Join Date: Feb 2009 Posts: 10	I is happening at low speed. IE at a stop light, turning into the driveway. ABS light comes on goes out. Front brakes have about 30k on them but don't look bad yet. I don't go through brakes to fast, I don't go from gas to break. It is legal to coast up to a stop. (The other half at the house kills a set every 15k, I don't even like to ride with her). Thanks for the tips I will look at them this weekend with any luck.