ABS Lights - S-10 Chevrolet Truck

if both the brake and abs light are on the float in the master cyl is stuck or sunk

Will check that today,Thanks. I had no trouble until I took the truck to the dealer, 27 miles away ,last year.I was having trouble with the dr. window making a popping sound at the top of travel. and the rt. seat belt would not reel out or in.They wanted $300.00 to fix both problems.Said no thanks just do the oil change.Got 1/2 way home and lights came on.Have bled the system several times,changed all brakes, still on. All levels are good. Will check the master cylinder again.Both ABS and brake light are on. Thanks again.

I once took a Chevy to the dealer for a "light sometimes on" problem. The owners manual instructed us to see the dealer for safety reasons. The dealer charged me $150 to, drum roll please, "PUT THE CAR ON THE COMPUTER!". The result was that the light did not come on when the car was hooked up to the computer and they told me to come back (probably for another $150) when the light came on again. One of the servicemen confided in me that the light often comes on without any problem.

In my opinion the Ford, Chrysler and Toyota dealers should send our local Chevy dealer a thank you card since he steered my business toward them.

Check the front for the ABS wires to the hub and rear (on the backside of the transmission) etc.. Repair; solder wires and clean connection then apply dielectric grease before re-assembly.

Check the vacuum lines, when you pop the hood its in the top right hand corner by the dash its three lines put together by a connector. Replace leaky hoses.

Check your ABS ground! It is a 12 or 10 gauge black wire that is easily found if you remove the air filter box and the wire bolts to the radiator support. Cut about 3 inches of the wire off, ***soldering*** a eyelet terminal and using a new self tapping metal screw into the radiator support. Add a 10 gauge ground wire that goes directly to the battery to the same self tapping screw.

Make sure you use dielectric grease to fight corrosion. The original wire location is in an area that may become compromised by water. Relocate it to an offset and higher location on the radiator support. Remember to always ALWAYS solder and double wall heat shrink the wiring whether it is located inside or outside to prevent corrosion. Don't forget to slip on the heat shrink prior to crimping on the connector!

Put black electrical tape over the lights.

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Some good advice and some funny advice!!!

wheel sensor

There is a chance that your wheel speed sensors are bad. When this happens to me, my ABS light, my Traction Control light, and my service vehicle light come on. Sometimes it is just like you said, it doesn't happen right away. My vehicle is a 2003 and it has 200,000 miles on it and I have had to replace wheel speed sensors twice and my lights are back on. Sometimes it only takes having one sensor go bad to set off the indicator lights.

It does only take one sensor to put the ABS error light on. (See handbook for details, it is sometimes the same light as for the handbrake on....)

Also, the ABS will not (normally) operate when the light is on. The light means that it is disabled (on all the cars I have driven with ABS!)

Its easy to test if its REALLY disabled or not (rainy day, clear road, no traffic and brake hard.)

If its disabled, you will not feel the pumping in the pedal!

It wouldn't hurt to go by a parts place and ask if they could attempt to read the OBD II codes. Two things may affect the feasability of this, though: 1) 2002 vehicles may not generate a code for ABS errors, 2) only more recent models of scanners can read ABS codes.

Wheel sensor issues often arise when unmatched tire sizes are used; front to rear or just mismatched etc..

Have not changed wheel size since truck was new, just started to do this after visit to dealer for oil change.He said it was not on when he checked it out.30 mile trip to dealer, came on about 1/2 way home.Some days stays off for long time.Other days on as soon as I start truck.

The clearance between wheel sensor and tone wheel is critical. Check the correct setting, then check yours. Another possibility is metallic dust on the magnetic sensor.

Where can I find clearance specs for the sensors? Is it listed in Chilton's?

The answer is in the factory manual. But, if you contact a business that sells the wheel sensors, they may have the specs you need. I am not sure of Chilton's. You might Google wheel sensor specs for the S-10 and see what shows up. Good luck.