any body know what speed sensors look like?

[CoastieCosta567]

hey guys, how does the rear speed sensors look like, i got code 24 and the cost to repair from isuzu is 1300 and each sensor is almost 400 bucks, do any of u guys have any clue what they look like and if its possible to clean and if they are broken where can i buy them for cheaper, like is there other GM product to sub it rather then go through the isuzu parts. and if possible how may i fix it my self and if u guys can send me a pic or something of what it may look like? thank you guys.

-CoastieCosta.

[ZEUS]

I will TRY to describe what they look like... there are sensors located at each wheel - I have seen them listed as ABS speed sensors. On the rear, the sensors are located just above the parking brake cable on the axle flange. There is a little black tube coming out of it which shields two wires - one black and one white. Each sensor is secured by one hex head bolt through a silver mount. You will have to clean up the area to see that the mount is silver though. Check junkyarddog.com and wait up to a week for someone to reply to your needs - if any junk yard in the nation has it and is registered with the service they will email you saying they have what you need. The Trooper uses the same sensors so search using that if you have no luck with the VX sensor search.

[CoastieCosta567]

thankou so much zues, i have tried everything and cleaned everything, but i didn't try cleaning those cuz i was told they where abs, so i never touched them, i will clean them and see if thats the problem cuz i do remmeber seeing them so dirty the back 1's and 1 of them had like gunk coming out of it. do u know how to take them off and how do u clean them safe so i wont mess them up if they are good? thank you again bro.

-CoastieCosta.

[ZEUS]

They are pretty difficult to get unseated as they are surrounded by rust. I would clean the area, remove the mounting bolt, and keep squirting penetrating oil around the mount for several days and then pull the tire off and then finally try to take the sensor off. Be careful not to pull the wires loose and be careful not to break the plastic housing when trying to remove it. The sensor itself might be dirty but I would bet the sensor is having trouble because of rust or dirt or something on the axle shaft so you might have to pull the shafts out to inspect and clean them. If you get to that point, you will see how the magnetic sensor reads wheel speed from blocky deviations on the axle shaft and why there may be a problem. As a precaution, keep the sensor from contacting metal while you are working on things. Good luck!

[CoastieCosta567]

thanks alot, i took 1 out and came out so easy, but for the second 1 i could get it out no matter what, but when i get it out and it don't work, how do i clean the shaft? or i mean how much would it cost me to have a mach.. do it for me? or i can do it my self? tnhank again Zeus.

-CoastieCosta.

[ZEUS]

Well I am just guessing here really... but if it has enough gunk and rust on it the shaft would just need some brake cleaner shot at it and then maybe some rust remover put on it. You shouldn't need a machinist to do anything, I don't think. To my understanding there is also a speed sensor at the transfer case - could that be the source of your error code?