Hello all - this is my first post on the forums here, joined to hopefully get some help sorting out an issue.

We have a 2008 Suburban LTZ, have owned it for about 2 years / 30k miles (currently 120k). The intermittent wiper settings never worked properly. The spin-down function to just wipe once works, as well as the 2 constant (2 fastest) speeds. The intermittent settings have always had a mind of their own, sometimes not wiping at all, then randomly starting and wiping at varying intervals.

First i changed out the wiper switch on the column with an OEM part - no luck there. I have now changed out the wiper motor itself (actually the whole linkage/motor assembly, also OEM) and the issue persists.

I have read some about BCM failure and it causing some strange issues. I am hesitant to attempt that but it may be my next shot.

Has anyone else had any similar issues with their intermittent wiper settings?

I appreciate any help you have to offer. Thanks!

 

Dude, I had a similar issue with my 2022 Silverado LT. Turns out it was the wiper switch itself, was faulty and needed to be replaced - pretty pricey but solved the problem for good.

 

I appreciate the reply. I have already replaced the wiper switch, as well as the wiper motor. Not sure where to turn from here....

 

Here's the Wiper Switch Schematic
Check the switch by unplugging the connector and measure the resistance between terminals M & N.
I'd compare the old switch with the new one. No resistance change indicates a bad switch.
With the switch connected, measure the voltage between M(Tan/Blk) & N(Lt Blu) checking for a change at each speed setting.
If the voltages change then you may have a bad BCM.

 

My 1970 and 1971 VWs and my 1998 Frontier do not have intermittent wipers by factory design/choice, and they do fine.

 

I appreciate the help! I have a BCM ordered, I will reply back here once I confirm the fix. I have questioned the BCM failure or issues before - random door open warning popping up when driving, lock cycling randomly. Cruise control would sometime not engage, which was recently fixed with a break pedal switch.

Hopefully the BCM will do the trick!

 

It could be defined as a luxury option.....tell that to my wife!