Dash lights

[Hog_Fan]

New to the group and these problems have probably already been discussed…07 Tahoe (1) when you press washer the washer sprays and the wipers work but won’t stop spraying until you turn the truck off… (2) replaced the tire sensors in all 4 tires but on the dash still show no pressure in any of them like the dash it’s getting the information (3) stabilitrack and abs lights come and go and also p0121 code… any help would be appreciated

 

[mikez71]

Does it drive normally?

The BCM controls the washers/wipers when you hit the switch. Is it still wiping as well as washing?
If washer only, the relay for the washer is integrated into the underhood fuse box..

Tire sensors need programmed.. There is a remote control module that receives the signal.

 

[Joseph Garcia]

1. As @mikez71 stated above, check the relay to see if it is functioning correctly.

2. Make sure that you have the correct frequency used by the new sensors, as the frequency has changed over the years. Since they do need to be electronically initiated, you can purchase a programmer for the sensors on Amazon for less than $30.

3. If you have/acquire a quality bi-directional scanner, you could troubleshoot the codes and most likely get to the root cause. In the meantime, check all ground points in the engine bay and along the truck's frame underneath to ensure that they are all clean and tight.

 

[Hog_Fan]

Does it drive normally?

The BCM controls the washers/wipers when you hit the switch. Is it still wiping as well as washing?
If washer only, the relay for the washer is integrated into the underhood fuse box..

Tire sensors need programmed.. There is a remote control module that receives the signal.

Normally… wipers and washer work but won’t stop spraying until you turn the truck off

 

[mikez71]

Unfortunately the relay is integrated onto the PCB (acccording to the diagrams)
so you may need a whole new fuseblock. Also COULD be the BCM which is the computer that sends the signal to the relay.
But I'm thinking a sticking relay is more likely..

 

[Fless]

It might be helpful to disconnect the negative battery terminal, then pull the top of the underhood fusebox off. Check the wires for rodent damage and the connectors for corrosion. Use electronic cleaner on the connector terminals and reseat them.

It also wouldn't hurt to test for voltage drop between the battery and the body, and the engine, just to rule out a main ground issue.

 

[mikez71]

looks like p0121 is throttle body related. That could certainly activate the stabilitrac and abs, so I would start there. Either get a scanner to check throttle positions or inspect wiring to throttle body.