has anyone had both the abs and parking break light come on simultaneously (sp) while driving down the road. i called a dealership and they said it may be a speed sensor. i also checked it with a scanner but no codes came up. any help or ideas are appreciated.

cade

 

i was told speed sensors or a bad abs brake module. both are very expensive and i dont drive the truck enough anymore to wory about it so i just deal with it...

when both lights are on your ABS system doesnt work

 

It's the ebcm(electronic brake control module) pull the fuse on it or it will drain your battery because the pump will stay running. It's actually very common, depending on your year and mileage your local dealer might be able to help you out under the goodwill program which allows the service manager with approval to replace out of warranty parts when there is a known problem with said part. It helps to have a good relationship with your local dealer.

 

mine has been doing this for about a year and half and its never drained. it stays parked weeks at a time now and cranks right up

 

Not all the time but most of the time if it's the ebcm the pump will remain running. Yours is probably a wheel speed sensor. I meant to include the question of do you hear the pump running? I've had mine replaced twice once at 38k and again at 46k. We used to replace several ebcm every week at dealer I was at. It's much more common than a speed sensor but both can cause the same lights on the dash. As for checking the code you need a tech2 with the ability to scan codes set by the abs system, not just the ecm.

 

thanks guys. i will check both out. my battery hasn't drained either and there are no signs of the pump staying on either.

 

I would imagine it would only run while your truck is running or actually moving so you might not hear it...

 

the speed sensors are dirty.

 

mine has been doing this for years.

all i did was pull the cluster and put some black eletrical tape behind the overlay. now i forget that it is even there.

 

if he did a search this topics been covered a few times, could be the ebcm, wheel speed sensors, abs sensors, or In my case the ground wires on the drives side cab mount were corroded, clean them up and all was fixed